Current photovoltaic paint systems achieve power conversion efficiencies between 5-12%, with significant variations in performance across different formulations and environmental conditions. These systems must balance multiple competing requirements: optical absorption across the solar spectrum, charge carrier transport through the paint matrix, and maintaining conventional paint properties like adhesion and durability.

The fundamental challenge lies in developing paint formulations that can effectively harvest solar energy while meeting the practical requirements of conventional architectural coatings.

This page brings together solutions from recent research—including quantum dot-based conversion layers, nanostructured semiconductor synthesis via sol-gel methods, multi-layer coating architectures, and flexible thin-film technologies. These and other approaches focus on improving both power conversion efficiency and real-world applicability across different surface types and environmental conditions.

1. Binder-Free Solar Paint with Nanostructured Semiconductor Synthesis via Sol-Gel Method

RAJEEV GANDHI MEMORIAL COLLEGE OF ENGINEERING AND TECHNOLOGY, 2025

Binder-free solar paint using sol-gel method for photovoltaic applications. The paint synthesizes nanostructured semiconductor materials through sol-gel processing, eliminating the need for conventional binders that compromise charge transport and electrical conductivity. This approach enables enhanced light absorption and charge carrier mobility, achieving improved energy conversion efficiency in solar cells. The sol-gel method ensures uniform particle distribution, strong adhesion to various surfaces, and long-term stability.

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2. Paint-Integrable Solar Additive Composition with Carbon-Silicon-Aluminum-Copper Matrix

JOSEPH LAGRANDEUR, 2024

Solar additive composition for paints that enables energy harvesting through solar radiation absorption. The composition comprises a solid mixture of carbon, silicon, aluminum, copper, and organic solvent, which is mixed and processed to create a dry powder that can be incorporated into water-based paints. When applied to a surface, the powder absorbs solar radiation and converts it into electrical energy. The composition can be formulated with various additives, including wetting agents, dispersing agents, and thickening agents, to enhance its performance.

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3. Quantum Dot-Based Photovoltaic Backplane with Cadmium Zinc Selenium Sulfur@Zinc Sulfide Light Conversion Coating

JIANGSU JOLYWOOD NEW MATERIAL TECHNOLOGY CO LTD, Jiangsu Zhonglai New Material Technology Co., Ltd., 2023

Quantum dot-based photovoltaic backplane and double-sided photovoltaic module that enhances backside efficiency through a novel quantum dot light conversion transparent coating. The backplane consists of a fluorocarbon transparent coating, a transparent functional film, and a quantum dot light conversion transparent coating, with the quantum dot material being cadmium zinc selenium sulfur@zinc sulfide functionalized with mercapto and carboxyl groups. This transparent coating, when applied to the backside of the photovoltaic cell, enables efficient conversion of ultraviolet light into visible light, thereby significantly improving the backside efficiency of the photovoltaic module. The transparent coating maintains high transmittance values across the visible spectrum, ensuring optimal light utilization.

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4. Building Coating with Integrated Photovoltaic Material for Electricity Generation

MAURO DE MORAIS, RICARDO VERONEZE LOPES, 2022

A building coating that generates electricity through the photovoltaic effect, enabling buildings to produce their own renewable energy while covering surfaces. The coating, comprising a photovoltaic material integrated into a specialized paint formulation, converts sunlight into electrical energy when exposed to sunlight. This innovative coating addresses the traditional limitations of photovoltaic panels by integrating them into building surfaces, enabling buildings to generate their own electricity while covering walls and roofs.

5. Multi-Layer Solar Coating with Light-Collecting, Electronic Transition, and Light-Absorbing Layers

HUIMIN LUO, 2021

A solar coating composition, solar coating, preparation method, and power storage device with high photoelectric conversion rate. The solar coating has three layers - a light-collecting layer, an electronic transition layer, and a light-absorbing layer. The light-collecting layer absorbs sunlight and reduces reflection. The electronic transition layer absorbs light and generates electrons. The light-absorbing layer absorbs more light and returns energy to the electronic transition layer. This coordinated absorption improves conversion rate compared to single layer coatings.

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6. Photovoltaic Coating with Silicone Resin Matrix and Nanoparticle Composite for Enhanced Optical and Electrical Properties

HEFEI HUAGAI PHOTOVOLTAIC TECH CO LTD, 2018

Photovoltaic coating for improving solar energy conversion through enhanced optical and electrical properties. The coating comprises a silicone resin matrix, silica sol, polyethylene terephthalate, graphene, titanium dioxide nanoparticles, and metal nanoparticles. The coating formulation balances water content with the specific weight ratio of these components to achieve optimal optical and electrical performance. The coating is prepared through a controlled polymerization process that incorporates a photopolymerization catalyst and polyisocyanate. The resulting coating exhibits superior optical transparency, electrical conductivity, and durability compared to conventional solar coatings.

7. Solar Power Generation Paint with Dual-Component System for Enhanced Charge Carrier Transport

ZIBO VOCATIONAL INST, 2018

Solar power generation paint with enhanced photoelectric conversion efficiency through a novel dual-component system. The paint comprises a conductive coating and a working coating, where the conductive coating provides electrical conductivity and the working coating facilitates charge separation. The combination of these components enables improved charge carrier transport and collection, leading to increased conversion efficiency in solar cells.

8. Powder Coating Process for Photovoltaic Layer Formation on Conductive Substrate

PISON STREAM SOLUTIONS LLC, 2018

A powder coating process for generating electricity through photovoltaic conversion. The process employs a conductive substrate as an electrode, with a photovoltaic layer containing absorption or reflective pigments on the light-absorbing side. The photovoltaic layer is overcoated with a protective layer. The process achieves up to 24-hour energy generation through a proprietary blend of absorption and photoactive pigments in a conductive resin matrix.

9. Photovoltaic Paint with Dual-Layer Lanthanum Oxide Resin and Zinc-Indium Primer for Semiconductor Junction Formation

SANDRA SALOME CASILLAS BOLANOS, SANDRA SALOME CASILLAS BOLAÑOS, 2017

Photovoltaic paint for surfaces that generates direct current through concentrated sunlight. The paint consists of two layers: a positive layer containing a resin with La2O3 and a negative layer comprising a zinc-indium-based primer. This combination enables efficient photovoltaic conversion by creating a semiconductor junction between the two layers. The paint can be applied to various surfaces, including glass, metal, and concrete, and provides a stable and reliable means of generating DC power through concentrated sunlight.

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10. Photovoltaic Coating with Composite Water-Repellent and Corrosion-Resistant Composition

GUANGXI NANNING SHENGQIAN TECH DEV CO LTD, 2016

Solar photovoltaic coating with enhanced performance and durability through a novel composition that addresses common challenges in solar photovoltaic coatings. The coating combines advanced materials with improved weather resistance, mechanical properties, and photoelectric conversion efficiency. Specifically, the coating features a composition that combines water-repellent properties with corrosion-resistant elements, enhances mechanical strength, and improves the overall conversion efficiency of solar photovoltaic cells.

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11. Photovoltaic Coating with Enhanced Durability and Conversion Efficiency via Unique Composition

GUANGXI NANNING SHENGQIAN TECH DEV CO LTD, 2016

Eco-friendly solar photovoltaic coating for improved energy conversion efficiency. The coating achieves superior performance through its unique composition, featuring enhanced durability and photovoltaic conversion capabilities. The coating's water, acid, corrosion, and aging resistance properties enable reliable operation across diverse environmental conditions while maintaining high power conversion efficiency.

12. Photovoltaic Coating with Surface Modification for Enhanced Energy Conversion and Durability

GUANGXI NANNING SHENGQIAN TECHNOLOGY DEVELOPMENT CO LTD, 2016

A new environmentally friendly solar photovoltaic coating that enhances solar energy conversion efficiency through advanced surface modification. The coating achieves superior performance by incorporating a novel surface treatment that addresses traditional coating limitations such as weather resistance, mechanical durability, and high-photovoltaic-efficiency conversion. The coating enables high-efficiency solar panels with improved durability and enhanced conversion rates, making it suitable for large-scale solar installations.

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13. Water-Based Light-Curable Coating with Conductive and Semiconductor Materials for Photovoltaic Conversion

成都新柯力化工科技有限公司, Chengdu New-Keli Chemical Engineering Sci Technic Co., Ltd., 2016

A water-based, light-curable photovoltaic conversion coating for building-integrated photovoltaics (BIPV) that enhances energy efficiency through improved photovoltaic performance. The coating comprises a water-based resin matrix with conductive materials, semiconductor materials, and light-reflecting components. The resin matrix enables fast curing, environmental protection, and easy promotion, while the semiconductor materials enhance photovoltaic conversion rates. The coating also incorporates a reflective component to capture and reuse solar energy. The system addresses common challenges in BIPV, including poor conductivity, electron migration, and high internal resistance, while achieving high conversion rates and efficiency.

CN104134714B-patent-drawing

14. Coating Liquid Comprising Semiconductor Nanocrystal and Heat-Disappearing Particle Composite for Porous Electrode Formation

RICOH CO LTD, 2016

Coating liquid for forming a porous semiconductor electrode that enables efficient dye-sensitized solar cell production. The coating liquid comprises a composite of semiconductor nanocrystal particles and heat-disappearing particles, which are combined in a specific ratio. The composite particles form a uniform pore structure in the electrode film, with the heat-disappearing particles creating a uniform pore size distribution. This uniform pore structure ensures consistent dye filling and electrolyte penetration, while maintaining optimal surface area and pore diameter.

15. Photoactive Coating with Layered Conductive Material Forming PN Junction for Electricity Generation

Chengdu Xinkeli Chemical Technology Co., Ltd., Chengdu New-Keli Chemical Engineering Sci Technic Co., Ltd., 2016

Solar paint that can be applied to surfaces to convert sunlight into electricity. The paint contains a mixture of conductive materials and surfactants. When applied, the paint forms a thin film coating on the surface. The conductive materials separate into two layers, with one layer containing an N-type semiconductor and the other layer containing a P-type semiconductor. This creates a PN junction that generates an electrical current when exposed to light. The paint enables simple and low-cost production of solar cells by eliminating the need for expensive materials and manufacturing processes used in conventional solar cells.

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16. Thin-Film Solar Cells with Nanoconical Absorber Layer Structures and Transparent Conductive Coating

ROBERT BOSCH GMBH, 2015

Thin-film solar cells that achieve higher efficiencies than conventional modules through innovative nanostructured architectures. The cells incorporate nanoconical structures within the absorber layer, which enhance light absorption by creating a tapered interface between the absorber and substrate. A transparent conductive coating is applied on top of the nanoconical structures, while a conductive layer is positioned on the substrate's second surface. This configuration enables superior light absorption and reduced parasitic absorption compared to conventional superstrate configurations. The nanoconical structures are fabricated using advanced nanolithography techniques, allowing precise control over their dimensions and arrangement.

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