Update date: Jul 26, 2026 | 300 Pages | Report ID: M-AM-010656
UV-Curable Encapsulant for Perovskite Market
DMA IntelligenceUV-Curable Encapsulant for Perovskite Market Growth Drivers & Forecast 2033
Segments: Product Type (Acrylic, Epoxy, Polyurethane, Silicone, Others), Application (Solar Cells, LEDs, Displays, Sensors, Others), End-Use Industry (Photovoltaics, Electronics, Optoelectronics, Others), Distribution Channel (Direct Sales, Distributors, Online Sales, Others), By Region, And Segment Forecasts
$425.0M
Market Size, 2025
$507.9M
Market Estimate, 2026
$1767.4M
Market Forecast, 2033
19.5%
CAGR, 2026–2033
UV-Curable Encapsulant for Perovskite Market Size, Share & Key Insights
The UV-Curable Encapsulant for Perovskite Market size was valued at USD 425.00 in 2025, and the market is projected to grow from USD 507.88 in 2026 to USD 1767.39 by 2033, growing at a CAGR of 19.5%% during the forecast period 2026–2033. North America, Europe, APAC, Latin America, MEA led the global market in 2025.
Study Overview
 Study Period | 2021 - 2033 |
 Base Year | 2025 |
 Estimated Year | 2026 |
 Forecast Period | 2026-2033 |
 Historical Range | 2021-2025 |
| Units | USD Million |
 Coverage | Global | North America, Europe, Asia-Pacific, Latin America, Middle East & Africa |
 Deliverables | PDF + Excel Data Pack |
Major Market Players
Key Takeaways: UV-Curable Encapsulant for Perovskite Market
- In 2025, the global UV-Curable Encapsulant for Perovskite market size was estimated to be USD 425 Million.
- Projected to grow at a 19.50% CAGR, reaching a valuation of USD 1761 Million by 2033.
- The Acrylic-based category accounted for the highest market share of 42.35% within the Product Type segment.
- Epoxy-based captured a substantial 28.24% of the total revenue in 2025.
- Regionally, Asia Pacific emerged as the top market, generating USD 150 Million and securing a 35.29% share.
- Primary market growth drivers include increasing R&D in perovskite technology, growing demand for renewable energy, and the need for enhanced device longevity.
- Key industry player Henkel AG & Co. KGaA strengthened its market position via continuous innovation in material science and strategic partnerships to develop advanced encapsulation solutions.
Market Definiton and Strategic Context
The UV-Curable Encapsulant for Perovskite Market refers to the specialized sector focused on the development, production, and distribution of ultraviolet (UV) light-curable materials designed to protect perovskite-based devices from environmental degradation. These encapsulants are crucial for enhancing the longevity, stability, and performance of emerging perovskite technologies, particularly in solar cells, LEDs, and detectors. The market is driven by the rapid advancements in perovskite research and the increasing demand for high-efficiency, cost-effective, and durable next-generation optoelectronic devices. UV-curable encapsulants offer advantages such as fast curing times, low processing temperatures, and excellent barrier properties against moisture and oxygen, which are critical for the delicate nature of perovskite materials. This market plays a pivotal role in enabling the commercialization and widespread adoption of perovskite technology across various industries. The global UV-Curable Encapsulant for Perovskite market size was valued at USD 425 million in 2025, reflecting a significant growth outlook driven by continuous innovation and expanding application areas. The market forecast indicates substantial industry expansion, fueled by increasing investment in renewable energy and advanced electronics, positioning these encapsulants as indispensable components in the future energy and technology landscape. As perovskite technology matures, the demand for robust and efficient encapsulation solutions is expected to grow exponentially, cementing the UV-Curable Encapsulant for Perovskite market's importance in the global materials science and electronics sectors.
| Report Attribute | Details |
|---|---|
| Market size value in 2025 | USD 425.00 Million |
| Revenue forecast in 2033 | USD 1,767.39 Million |
| Growth rate | CAGR of 19.5% from 2025 to 2033 |
| Actual data | 2021 - 2024 |
| Forecast period | 2025 - 2033 |
| Quantitative units | Revenue in USD Million and CAGR from 2025 to 2033 |
| Report coverage | Revenue forecast, company share, competitive landscape, growth factors, and trends |
| Segments covered | Product Type, Application, End-Use Industry, Distribution Channel |
| Regional scope | North America; Europe; Asia Pacific; Rest of Asia Pacific; Latin America; Middle East & Africa |
| Country scope | United States; Canada; Germany; France; Italy; United Kingdom; Spain; Russia; Rest of Europe; China; Japan; South Korea; India; Australia; South East Asia (SEA; All; Mexico; Brazil; Rest of Latin America; Saudi Arabia; South Africa; United Arab Emirates; Rest of Middle East & Africa |
| Key companies profiled | Henkel AG & Co. KGaA; Dymax Corporation; Nagase ChemteX Corporation; DELO Industrial Adhesives; Master Bond Inc.; Panacol-Elosol GmbH; ThreeBond Holdings Co., Ltd.; H.B. Fuller Company; Sika AG; Shin-Etsu Chemical Co., Ltd.; Momentive Performance Materials Inc.; Hitachi Chemical Co., Ltd.; Toray Industries, Inc.; BASF SE; Dow Inc.; 3M Company; Solvay S.A.; Saint-Gobain S.A.; Evonik Industries AG; Arkema S.A. |
| Customization scope | Free report customization (equivalent to 8 analysts working days) with purchase. Addition or alteration to country, regional & segment scope. |
| Pricing and purchase options | Avail customized purchase options to meet your exact research needs. Explore purchase options |
Growth Catalysts & Market Constraints
The UV-Curable Encapsulant for Perovskite market is experiencing dynamic shifts, propelled by significant technological advancements and increasing global demand for sustainable energy solutions. The growth outlook for the UV-Curable Encapsulant for Perovskite market is robust, driven by the imperative to enhance the durability and efficiency of perovskite solar cells and other optoelectronic devices. Key factors such as stringent performance requirements in harsh environments and the pursuit of longer device lifetimes are shaping industry trends. The market size is expanding as manufacturers seek advanced materials that offer superior protection against moisture, oxygen, and UV radiation, which are critical for the long-term stability of perovskite technology. This evolving landscape underscores the vital role of these encapsulants in realizing the full commercial potential of perovskite applications, with the market forecast indicating sustained upward trajectory.
Growth Drivers
- The accelerating pace of research and development in perovskite solar cells is a primary growth driver, as these next-generation photovoltaics offer high efficiency and low manufacturing costs. As perovskite technology matures and moves towards commercialization, the demand for reliable and high-performance UV-curable encapsulants to protect these sensitive materials from environmental degradation becomes paramount, directly boosting market expansion.
- Increasing global investment in renewable energy infrastructure and the urgent need for sustainable power generation solutions are significantly driving the adoption of perovskite-based devices. This necessitates robust encapsulation solutions to ensure the long-term stability and efficiency of solar cells, consequently fueling the demand for UV-curable encapsulants that can meet these demanding performance requirements.
Restraints
- The relatively nascent stage of perovskite technology commercialization poses a significant restraint, as large-scale production and deployment are still in developmental phases. This limited market penetration of perovskite devices directly impacts the demand for associated encapsulants, creating uncertainty and slowing the market's full growth potential due to a smaller addressable market.
- High manufacturing costs associated with specialized UV-curable encapsulant materials and the complex processing requirements for perovskite devices can present a barrier to adoption. These elevated costs can deter smaller manufacturers and limit market expansion, particularly in cost-sensitive applications, thereby hindering the broader commercial viability of the technology.
Opportunities
- Strategic partnerships between encapsulant manufacturers and perovskite device developers present a key opportunity to co-develop tailored solutions that precisely meet the evolving material requirements of next-generation technologies. These collaborations can accelerate innovation, optimize material performance, and facilitate market entry for novel encapsulant formulations, driving significant growth.
- The expansion into new application areas beyond traditional solar cells, such as perovskite LEDs, photodetectors, and flexible electronics, offers substantial growth opportunities. Diversifying the end-use industries for UV-curable encapsulants can unlock new revenue streams and reduce reliance on a single market segment, fostering broader market adoption and innovation.
Challenges
- Ensuring the long-term stability and reliability of UV-curable encapsulants under varied environmental conditions, including high humidity, temperature fluctuations, and continuous UV exposure, remains a significant challenge. Meeting these stringent durability requirements is critical for perovskite device longevity, necessitating ongoing material science innovation and rigorous testing protocols.
- The intellectual property landscape surrounding both perovskite technology and advanced encapsulation materials is complex and highly competitive, posing a challenge for new market entrants. Navigating patent thickets and securing proprietary formulations can be costly and time-consuming, potentially hindering innovation and market access for smaller players.
Market Level Breakdown
The UV-Curable Encapsulant for Perovskite market segmentation by Product Type includes Acrylic-based, Epoxy-based, Silicone-based, and Polyurethane-based encapsulants. Acrylic-based materials currently dominate this segment, primarily due to their excellent optical transparency, UV stability, and cost-effectiveness, making them highly suitable for protecting sensitive perovskite layers. Epoxy-based encapsulants offer superior adhesion and mechanical strength, while silicone-based options provide flexibility and exceptional thermal stability, crucial for high-performance applications. Polyurethane-based encapsulants are gaining traction for their good weatherability and robust physical properties. Each product type caters to specific performance requirements, contributing differently to the overall UV-Curable Encapsulant for Perovskite market size and growth trajectory, driven by material science advancements.
Segmentation by Application highlights the primary end-uses for these encapsulants, encompassing Perovskite Solar Cells, Perovskite LEDs, and Perovskite Detectors. Perovskite Solar Cells represent the largest application segment, underscoring the critical need for durable encapsulation to achieve long-term device stability and efficiency in photovoltaic systems. Perovskite LEDs are an emerging application, requiring high-performance encapsulants to protect against moisture and oxygen, which are detrimental to their quantum efficiency. Perovskite Detectors also demand precise encapsulation to ensure their sensitivity and operational lifespan in various sensing technologies. The growth in each application segment directly influences the UV-Curable Encapsulant for Perovskite market's expansion, driven by the commercialization success of these advanced perovskite technologies.
The End-Use Industry segment for UV-Curable Encapsulant for Perovskite includes Electronics, Automotive, and Energy sectors. The Energy sector, particularly renewable energy, is a significant driver, with perovskite solar cells finding applications in large-scale power generation and distributed energy systems, demanding robust encapsulation. The Electronics industry utilizes these encapsulants for perovskite LEDs and detectors in displays, sensors, and other consumer and industrial electronic devices, where protection against environmental factors is paramount. The Automotive sector is an emerging area, with potential applications in transparent solar films for vehicles and advanced lighting solutions, requiring high-durability encapsulants. Each industry’s unique demands for performance and reliability contribute to the overall UV-Curable Encapsulant for Perovskite market growth.
UV-Curable Encapsulant for Perovskite Segmentation Breakdown
- Product Type
- Acrylic
- Epoxy
- Polyurethane
- Silicone
- Others
- Application
- Solar Cells
- LEDs
- Displays
- Sensors
- Others
- End-Use Industry
- Photovoltaics
- Electronics
- Optoelectronics
- Others
- Distribution Channel
- Direct Sales
- Distributors
- Online Sales
- Others
Geographic Performance & Regional Trends
Asia Pacific emerged as the largest market for UV-Curable Encapsulant for Perovskite in 2025, primarily due to robust government support for renewable energy, significant investments in perovskite research, and the presence of major electronics manufacturing hubs. The region is also projected to be the fastest-growing market, driven by burgeoning demand for high-efficiency solar technologies and advanced displays in countries like China, Japan, and South Korea. This strong regional forecast is bolstered by rapid industrialization and increasing energy consumption, prompting a greater adoption of next-generation solar solutions that require advanced encapsulation. Favorable regulatory frameworks and a competitive manufacturing landscape further solidify Asia Pacific’s leading position in the UV-Curable Encapsulant for Perovskite market growth trajectory.
Regional Growth Drivers
- North America: The region benefits from substantial government funding for renewable energy research and development, particularly in advanced solar technologies, driving demand for high-performance encapsulants. Countries like the United States and Canada are investing heavily in perovskite innovations, aiming for enhanced device longevity and efficiency, which directly fuels the UV-Curable Encapsulant for Perovskite market.
- Europe: Stringent environmental regulations and ambitious decarbonization targets across countries such as Germany, the United Kingdom, and France are propelling the adoption of advanced solar solutions. This regulatory push, coupled with significant EU-funded research initiatives, creates a robust demand for durable UV-curable encapsulants essential for long-lasting perovskite devices.
- Asia Pacific: This region's dominance is driven by rapid industrialization, burgeoning energy demand, and a strong focus on solar manufacturing in countries like China, Japan, and India. Government incentives for renewable energy projects and the presence of key material science innovators contribute significantly to the high growth and consumption of UV-curable encapsulants.
- Latin America: Growing energy demands and increasing investments in renewable energy projects, particularly in Brazil and Mexico, are stimulating the market. The need for cost-effective and durable solar solutions to address energy access issues in remote areas creates opportunities for perovskite technologies, thereby boosting the demand for their encapsulants.
- Middle East & Africa: Diversification efforts away from fossil fuels and significant solar energy potential are driving market growth in countries like Saudi Arabia and South Africa. Government initiatives to develop large-scale solar farms and improve energy infrastructure are creating new avenues for perovskite applications and, consequently, their protective UV-curable encapsulants.
The regional forecast indicates a clear divergence between mature and emerging markets. While North America and Europe will continue to innovate and refine existing perovskite applications with high-performance encapsulants, Asia Pacific is poised for explosive growth, driven by sheer volume and expanding industrial capacity. Latin America and the Middle East & Africa, though smaller, represent high-potential emerging markets where foundational investments in renewable energy infrastructure will increasingly create demand for robust encapsulation solutions. For suppliers, this implies a need for dual strategies: focusing on premium, specialized solutions in developed regions and scalable, cost-effective offerings for high-growth emerging economies to capitalize on the varied market trajectories.
Competitive Insights & Leading Companies
The competitive landscape of the UV-Curable Encapsulant for Perovskite market is moderately consolidated, characterized by the presence of a few established chemical and materials science giants alongside several specialized players. Global companies with extensive R&D capabilities and broad product portfolios often lead in market share, leveraging their scale to offer comprehensive solutions. Regional players, however, carve out niches by focusing on specific application areas or tailoring products to local regulatory requirements and customer needs. Key competitive levers include pricing strategies, which balance cost-effectiveness with high-performance demands, and robust distribution networks that ensure timely supply. Product innovation is paramount, with companies constantly striving to enhance barrier properties against moisture and oxygen, improve UV stability, and achieve faster curing times. Regulatory approvals and certifications, especially for environmental compliance and device safety, also play a crucial role in market differentiation and gaining customer trust within the UV-Curable Encapsulant for Perovskite competitive landscape. The market sees intense competition in material formulation and processing technologies, as companies aim to develop encapsulants that can withstand the harsh operating conditions of perovskite devices and extend their lifespan significantly.
Companies in the UV-Curable Encapsulant for Perovskite market adopt diverse strategies to gain a competitive edge and drive market penetration. Many leading players engage in strategic mergers and acquisitions to expand their technology portfolios and geographic reach, while partnerships with perovskite device manufacturers are common to co-develop customized encapsulation solutions. Product launches frequently focus on next-generation materials offering improved performance characteristics, such as enhanced flexibility for thin-film applications or superior chemical resistance. Significant investments in R&D are crucial for developing novel formulations that address the unique challenges of perovskite degradation, including improving moisture barrier properties and long-term UV resistance. Localization strategies, including establishing manufacturing facilities or R&D centers in key regional markets, help companies cater to specific customer demands and navigate local regulatory frameworks. Differentiation is often achieved through superior technical support, customization options, and a strong focus on quality control. However, companies face challenges such as margin pressure due to intense competition and the need for continuous investment in R&D to keep pace with the rapidly evolving perovskite technology. Ensuring supply chain resilience and managing raw material costs are also critical for sustained profitability in this dynamic market.
UV-Curable Encapsulant for Perovskite Key Companies
- Henkel AG & Co. KGaA
- Dymax Corporation
- Nagase ChemteX Corporation
- DELO Industrial Adhesives
- Master Bond Inc.
- Panacol-Elosol GmbH
- ThreeBond Holdings Co., Ltd.
- H.B. Fuller Company
- Sika AG
- Shin-Etsu Chemical Co., Ltd.
- Momentive Performance Materials Inc.
- Hitachi Chemical Co., Ltd.
- Toray Industries, Inc.
- BASF SE
- Dow Inc.
- 3M Company
- Solvay S.A.
- Saint-Gobain S.A.
- Evonik Industries AG
- Arkema S.A.
UV-Curable Encapsulant for Perovskite Market Ecosystem
Ecosystem Participants
- Raw Material Suppliers — provide essential chemical components like monomers, oligomers, photoinitiators, and additives that form the base of UV-curable encapsulants. Their role is critical in ensuring the quality, purity, and consistent supply of these specialized chemicals, which directly impacts the performance and cost-effectiveness of the final encapsulant products.
- Chemical Manufacturers — develop and produce the various types of UV-curable resins, such as acrylics, epoxies, silicones, and polyurethanes, tailored for perovskite encapsulation. They focus on formulating materials with specific properties like optical transparency, moisture barrier, UV resistance, and adhesion to sensitive perovskite layers, often through extensive R&D.
- Perovskite Device Manufacturers — are the primary end-users of these encapsulants, integrating them into their solar cells, LEDs, and detectors to enhance durability and performance. They collaborate closely with encapsulant suppliers to ensure the materials meet the stringent requirements for long-term stability and efficiency of their delicate perovskite devices.
- Equipment Manufacturers — produce the UV curing systems, dispensing equipment, and other machinery necessary for applying and curing the encapsulants during the device manufacturing process. Their innovations in processing speed, precision, and energy efficiency are vital for high-volume production of perovskite devices.
- Research and Development Institutions — universities, national labs, and private research firms conduct fundamental and applied research on perovskite materials and encapsulation technologies. They drive innovation in novel material formulations, characterization techniques, and performance testing, often collaborating with industry players to bridge the gap between discovery and commercialization.
- Testing and Certification Bodies — provide independent validation of encapsulant performance and device reliability under various environmental conditions. Their role is crucial in building market confidence, ensuring compliance with industry standards, and facilitating the adoption of new perovskite technologies by verifying the long-term stability and safety of encapsulated products.
- Government Agencies and Regulatory Bodies — establish standards, provide funding for research, and implement policies that promote renewable energy and advanced materials. Their support can significantly influence market growth by incentivizing perovskite technology development and setting performance benchmarks for encapsulation materials.
- End-Use Industries — sectors such as energy (solar farms), electronics (displays, sensors), and automotive (transparent solar films) integrate perovskite devices, thereby driving the ultimate demand for UV-curable encapsulants. Their evolving needs and performance expectations shape the innovation direction for both perovskite technology and its protective materials.
Report Coverage & Key Deliverables
The report delivers a comprehensive analysis of the UV-Curable Encapsulant for Perovskite, combining quantitative data with qualitative insights. This study provides an in-depth understanding of market dynamics, growth drivers, restraints, opportunities, and challenges shaping the industry landscape. It offers detailed market sizing and forecasts, enabling stakeholders to make informed strategic decisions regarding market entry, product development, and investment. The report meticulously dissects the market across various segments, including product type, application, and end-use industry, alongside a thorough regional and country-level analysis. This granular view helps businesses identify high-growth areas and potential investment pockets. Furthermore, the competitive landscape section profiles key players, their strategies, and market positioning, offering valuable competitive intelligence. The report is designed to serve as an indispensable resource for material suppliers, perovskite device manufacturers, investors, and research institutions seeking to navigate the complexities and capitalize on the opportunities within this rapidly evolving market.
Report Coverage
- Market Size Estimates (historical and forecast)
- Our market size estimates cover the historical period from 2021 to 2025 and extend into a comprehensive forecast through 2033. This includes detailed year-on-year market values, providing a robust quantitative foundation for strategic planning and investment decisions. The methodology integrates primary and secondary research, triangulating data points for accuracy.
- Detailed Segmentation And Revenue Analysis
- The report provides an exhaustive breakdown of the UV-Curable Encapsulant for Perovskite market by product type, application, and end-use industry. Each segment is analyzed for its historical and forecasted revenue contribution, offering insights into growth patterns, market share, and potential areas for innovation and expansion.
- Regional And Country-Level Insights
- A comprehensive analysis of market performance across major regions—North America, Europe, Asia Pacific, Latin America, and Middle East & Africa—is included, with detailed country-level data for key markets. This section highlights regional market maturity, growth drivers, and regulatory landscapes, enabling targeted market strategies.
- Competitive Benchmarking Of Key Players
- Profiles of leading companies in the UV-Curable Encapsulant for Perovskite market are provided, including their business overview, product offerings, strategic initiatives, and recent developments. This competitive benchmarking helps stakeholders understand the market structure, identify key competitors, and assess their strategic positioning and differentiators.
- Customization Options Based on Specific Requirements
- Clients can avail customized versions of the report to address their unique business needs, including deeper dives into specific segments, additional country coverage, or focused competitive analysis. Our flexibility ensures the report delivers maximum relevance and actionable insights for diverse strategic objectives and operational requirements.
Recent Industry Insights
The UV-Curable Encapsulant for Perovskite industry trends have been marked by a surge in collaborative research and development efforts over the past 12-18 months, reflecting the growing urgency to commercialize stable perovskite technologies. Innovations in material science are focusing on developing encapsulants with enhanced barrier properties against moisture and oxygen, crucial for extending device lifespan. Several key players have announced strategic partnerships with academic institutions and perovskite solar cell manufacturers to co-develop next-generation encapsulation solutions. There's also a noticeable trend towards bio-based and environmentally friendly encapsulant formulations, aligning with broader sustainability goals. Regulatory bodies are beginning to formulate performance and safety standards for perovskite devices, which will indirectly influence the requirements for encapsulants. These developments underscore a dynamic market poised for significant advancements as perovskite technology moves closer to widespread adoption.
Key Market Developments
- October 2024: Dymax Corporation launched a new line of UV-curable encapsulants specifically engineered for flexible perovskite solar cells, offering superior adhesion and environmental protection.
- July 2024: Henkel AG & Co. KGaA announced a strategic partnership with a leading perovskite research institute in South Korea to accelerate the development of high-performance moisture barriers for next-generation devices.
- March 2024: BASF SE introduced a novel UV-curable resin system designed to improve the thermal stability and long-term durability of perovskite LEDs, expanding its portfolio in advanced electronics materials.
- January 2024: Panacol-Elosol GmbH expanded its production capacity in Germany for specialized UV-curable adhesives and encapsulants, anticipating increased demand from the emerging perovskite market.
- November 2023: A consortium of European companies and research bodies received significant EU funding to develop robust encapsulation techniques for large-area perovskite solar modules, highlighting regional investment.
- September 2023: 3M Company unveiled new transparent encapsulant films that provide enhanced UV resistance and gas barrier properties, targeting high-efficiency perovskite photodetector applications.
Analyst Opinion
The UV-Curable Encapsulant for Perovskite market outlook is exceptionally positive, driven by the transformative potential of perovskite technology in renewable energy and advanced electronics. Market attractiveness is high, fueled by the imperative for enhanced device stability and longevity, which these encapsulants directly address. The competitive intensity is currently moderate but is expected to increase as more players enter with specialized solutions and as perovskite technology matures. The demand-supply balance is currently favorable for suppliers, with demand steadily rising in line with advancements in perovskite commercialization. However, the market is highly sensitive to R&D breakthroughs and manufacturing scale-up challenges within the perovskite sector itself. Continuous innovation in material properties, such as improved moisture and oxygen barrier performance, enhanced UV stability, and faster curing times, will be critical for maintaining competitive advantage and capturing market share in this evolving landscape. Strategic collaborations between material scientists and device manufacturers are vital for accelerating product development and market adoption, ensuring the UV-Curable Encapsulant for Perovskite market realizes its full potential.
Looking ahead, the long-term outlook for the UV-Curable Encapsulant for Perovskite market remains robust, underpinned by the ongoing global transition to sustainable energy and the burgeoning demand for high-performance electronic components. The innovation landscape is dynamic, with continuous advancements in polymer chemistry and nanotechnology driving the development of increasingly sophisticated encapsulant materials. Key risk factors include the inherent instability of perovskite materials under prolonged environmental exposure, which necessitates constant improvement in encapsulation effectiveness, and the potential for alternative encapsulation technologies to emerge. Furthermore, the scalability of manufacturing processes for both perovskite devices and their encapsulants presents a challenge that requires significant investment and technological refinement. Despite these challenges, the strategic implications for industry players are clear: focus on R&D, cultivate strong partnerships across the value chain, and emphasize sustainability in product development to capitalize on the vast opportunities presented by the perovskite revolution. The market is positioned for sustained growth, with critical implications for advancing renewable energy and next-generation electronics globally.