Organic-inorganic hybrid solar cells offer remarkable power conversion efficiencies above 25%, but their widespread adoption faces a critical hurdle: moisture sensitivity. When exposed to relative humidity above 50%, these devices typically show degradation within hours, with performance dropping significantly as water molecules trigger decomposition of the active layer materials.

The fundamental challenge lies in developing encapsulation strategies that maintain optical transparency and electrical conductivity while providing robust protection against moisture ingress.

This page brings together solutions from recent research—including parylene composite encapsulation layers, quasi-two-dimensional fluorinated structures, and multi-layer protective architectures with integrated barrier films. These and other approaches focus on practical methods to achieve both high efficiency and long-term stability under real-world environmental conditions.

1. Perovskite Solar Cell with Parylene Composite Encapsulation and Tunneling Interconnect Layer

SHANGHAI ELECTRIC GROUP HENGXI PHOTOVOLTAIC TECH NANTONG CO LTD, 2024

A perovskite solar cell structure and method that enables stable operation of perovskite solar cells through a novel encapsulation approach. The cell structure comprises a battery body with a base layer, a perovskite layer, and a tunneling interconnect layer, while the encapsulation film is a parylene composite layer. The encapsulation film is applied over the perovskite layer and serves as a barrier against environmental degradation, while maintaining optical transparency. The encapsulation film is specifically designed to accommodate the perovskite layer's unique properties and prevent water and oxygen-induced degradation.

CN117812922A-patent-drawing

2. Method for Fabricating Perovskite Solar Cells with One-Dimensional Multi-Layer Structure

CONTEMPORARY AMPEREX TECHNOLOGY CO LTD, 2023

A method for creating perovskite solar cells with enhanced stability through the controlled formation of one-dimensional perovskite layers. The method employs a novel three-layer approach where a lead-based perovskite layer is followed by a protective lead pyridine-2-carboxylate layer, and finally a third layer of lead pyridine-2-carboxylate. This multi-layer structure prevents ion migration and degradation through light, while maintaining optimal charge transport properties. The protective layer is specifically designed to prevent water and oxygen ingress, ensuring long-term device performance.

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3. Perovskite Solar Cell with 2-Hydrazinobenzothiazole Doped Light-Absorbing Layer and Layered Electrode Structure

HEBEI UNIVERSITY OF TECHNOLOGY, 2023

A novel perovskite solar cell with enhanced stability through multifunctional additive engineering. The cell incorporates a perovskite light-absorbing layer containing 2-hydrazinobenzothiazole (2-HBT) as a doping agent, which improves humidity stability and prevents moisture-related degradation. The cell structure comprises a bottom electrode, hole transport layer, modification layer, perovskite light-absorbing layer, electron transport layer, buffer layer, and pair electrode. The 2-HBT doping level is controlled between 0.01-10wt% in the perovskite active layer. The cell's performance includes enhanced open-circuit voltage, short-circuit current density, fill factor, and photoelectric conversion efficiency compared to conventional perovskite solar cells.

4. Perovskite Solar Cell with Fluorinated Aromatic Compound-Based Hole Transport Layer

DAEGU CATHOLIC UNIVERSITY INDUSTRY ACADEMIC COOPERATION FOUNDATION, 2020

Perovskite solar cells with enhanced water resistance and hole transport properties through a novel hole transport layer composition. The cell features a hole transport layer comprising a hole transport agent and an aromatic compound with 6 or more fluorine atoms, which provides superior water resistance while maintaining high hole transport efficiency. The aromatic compound enhances hole transport characteristics through its fluorine-containing molecular structure. The cell architecture includes a transparent electrode, a photoactive layer, and a hole transport layer, with the hole transport layer forming a barrier against moisture and oxygen exposure.

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5. Perovskite Solar Cell with Hydrophobic Titanium Dioxide/Polysiloxane Coating for Enhanced Stability

XIAN ZHISHENG RUIXIN SEMICONDUCTOR TECH CO LTD, 2020

A perovskite solar cell anti-perovskite decomposition structure that enhances device stability through a hydrophobic titanium dioxide/polysiloxane coating. The coating protects the perovskite film from moisture and oxygen exposure while maintaining its optical properties, particularly in visible light. The titanium dioxide layer, with its high light transmittance and matching conduction band energy levels with fullerene, facilitates electron transport and transmission. The polysiloxane layer enhances water transport, preventing perovskite decomposition and improving device durability.

6. Perovskite Solar Cell with Integrated Transparent Protective Layer

XIAN ZHISHENG RUIXIN SEMICONDUCTOR TECH CO LTD, 2020

Perovskite solar cell with a transparent protective layer that enhances device durability and efficiency. The cell incorporates a transparent protective layer to prevent damage from environmental factors like oxygen and moisture. This layer is integrated into the perovskite material structure, providing a protective barrier against degradation while maintaining the solar cell's optical and electrical performance.

7. Solar Cell with Lateral Protective Layer on Perovskite Structure

SEKISUI CHEMICAL CO LTD, 2020

Solar cell with enhanced durability against moisture-induced degradation of the photoelectric conversion layer. The cell comprises a cathode, anode, and perovskite layer between them, with a protective layer applied to the perovskite layer's lateral surface. This lateral layer prevents moisture ingress from the perovskite layer's surface, thereby protecting the perovskite layer from degradation. The protective layer is formed on the perovskite layer's lateral surface and covers the perovskite layer's surface. This dual-layer approach provides comprehensive protection against moisture ingress, enabling the perovskite layer to maintain its performance and integrity.

8. Perovskite Solar Cell with Hydrophobic Interface Layer Between Perovskite and Transport Layers

WUHAN UNIVERSITY OF TECHNOLOGY, Wuhan University of Technology, 2020

A stable perovskite solar cell with improved durability and long-term performance. The cell features a novel interface layer that prevents water absorption and degradation of the perovskite material. This hydrophobic layer is strategically positioned between the perovskite and transport layers, creating a hydrophobic barrier that shields the perovskite from water exposure. The cell's architecture combines a conductive substrate with a hydrophobic perovskite layer, a hole-transporting layer, and a metal counter electrode. The hydrophobic interface layer enhances the cell's stability and durability, enabling high-photovoltaic efficiency and long-term operation in ambient conditions.

9. Perovskite Solar Cell with Dislocation Oxide Layer Between Hole Transport Layer and Electrode

XIAN JIAOTONG-LIVERPOOL UNIVERSITY, 2019

High-stability perovskite solar cell structure that enhances the performance of perovskite solar cells through improved moisture barrier protection. The cell architecture incorporates a substrate with an electron transport layer, a perovskite layer, a hole transport layer, and an electrode, with a dislocation oxide layer positioned between the hole transport layer and the electrode. This configuration creates a moisture-resistant barrier between the perovskite layer and the electrode, while maintaining the perovskite's structural integrity and thermal stability.

10. Organic-Inorganic Composite Solar Cells with Direct Perovskite-Transparent Electrode Interface and Integrated Hole Transport Layer

LG CHEMICAL LTD, 2019

Organic-inorganic composite solar cells with enhanced stability and efficiency, particularly suitable for low-light applications. The cells employ a perovskite-based photoactive layer that directly interfaces with a transparent conductive electrode, while a hole transport layer is integrated between the electrode and the perovskite layer. This configuration enables superior performance under low-light conditions compared to conventional solar cells, while maintaining the benefits of perovskite materials. The manufacturing process involves forming a transparent conductive electrode, creating the perovskite photoactive layer directly on the electrode, and then integrating a hole transport layer between the electrode and the perovskite layer.

KR20190101741A-patent-drawing

11. Perovskite Solar Cell with Specialized Precursor-Formed Protective Layer for Enhanced Stability

VALIANT CO LTD, 2019

A perovskite solar cell with enhanced stability and durability through a novel protective layer. The cell incorporates a protective layer that prevents degradation of the perovskite material and metal electrode during environmental exposure, while maintaining optimal photoelectric performance. The protective layer is achieved through the preparation of specialized precursors that form a stable, water-resistant barrier between the perovskite and electrode interfaces. This innovative approach addresses the stability issues associated with perovskite solar cells and enables their commercialization.

CN110190193A-patent-drawing

12. Perovskite Solar Cell with Organic-Inorganic Hybrid Structure

Hunan Normal University, HUNAN NORMAL UNIVERSITY, 2018

A perovskite solar cell with enhanced stability and efficiency through a novel organic-inorganic hybrid structure. The cell comprises a perovskite material with a specific organic-inorganic hybrid composition that combines the benefits of both materials. This hybrid structure enables improved thermal stability and resistance to environmental degradation, resulting in a highly efficient and durable perovskite solar cell.

13. Solar Cell with Three-Layer Organic-Inorganic Hybrid Structure Incorporating Base Layer for Lattice Stabilization

LG CHEM LTD, 2018

Organic-inorganic hybrid solar cell with enhanced stability and high efficiency through a novel architecture. The cell features a three-layer structure comprising a base layer, a perovskite layer, and a hole transport layer. The base layer serves as a binder between the perovskite layer and the hole transport layer, preventing lattice spacing changes during temperature transitions. This structural design ensures device stability and maintains optimal performance characteristics despite phase transitions in the perovskite layer.

EP3306691A1-patent-drawing

14. Flexible Solar Cell with Integrated Barrier Layer Sealing Photoelectric and Insulating Layers

SEKISUI CHEMICAL CO LTD, 2018

Flexible solar cell with enhanced durability through a novel barrier layer configuration. The solar cell comprises a flexible base material, an insulating layer, an electrode, a photoelectric conversion layer containing an organic-inorganic perovskite compound, a counter electrode, and a barrier layer. The barrier layer seals both the photoelectric conversion layer and the insulating layer, preventing moisture ingress and ensuring the perovskite conversion layer remains intact. This barrier layer configuration enables the solar cell to maintain its electrical performance even when the photoelectric conversion layer contains organic-inorganic perovskite compounds, which are known to degrade in conventional solar cells.

WO2018052032A1-patent-drawing

15. Solar Cell with Organic-Inorganic Perovskite Photoelectric Conversion Layer and Inorganic Moisture Barrier

SEKISUI CHEMICAL CO LTD, 2017

Solar cell with enhanced durability and photoelectric conversion efficiency through the use of an organic-inorganic perovskite compound as the photoelectric conversion layer. The solar cell features a laminate structure comprising an electrode, counter electrode, and photoelectric conversion layer, with the counter electrode covered by an inorganic layer. The photoelectric conversion layer incorporates the perovskite compound, which exhibits superior performance characteristics compared to conventional inorganic materials. The inorganic layer provides a dense barrier against moisture and encapsulation degradation, while the encapsulation resin maintains the structural integrity of the solar cell.

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16. Solar Cell with Perovskite Conversion Layer and (Meth)acrylic Resin Encapsulation

SEKISUI CHEMICAL CO LTD, 2017

Solar cell with enhanced performance through improved encapsulation and thermal stability. The cell features a laminate with an electrode, counter electrode, and photoelectric conversion layer between them, with the conversion layer comprising an organic-inorganic perovskite compound. The laminate is encapsulated with a (meth)acrylic resin having a C atom/0 atom ratio of 4 or more, which prevents degradation of the perovskite during encapsulation. The encapsulated laminate is then covered with an inorganic layer, providing enhanced durability and thermal resistance.

17. Hybrid Perovskite Solar Cell with Multi-Layer Structure Including Alumina and Metal Electrodes

HAIAN CHANGZHOU UNIVERSITY HIGH-TECH TECHNOLOGY RESEARCH AND DEVELOPMENT CENTER, 2016

A waterproof organic/inorganic hybrid perovskite solar cell that maintains high efficiency even in humid environments. The cell features a glass substrate with a dense layer of alumina and metal electrode layer, followed by a perovskite layer, dense layer, hole transport layer, and metal electrode layer. This multi-layer architecture prevents water and moisture from reaching the perovskite material, while maintaining its photovoltaic performance.

18. Hybrid Perovskite Solar Cells with Dense TiO2 and Alumina Layers for Humidity Resistance

HAIAN CHANGZHOU UNIVERSITY HIGH-TECH TECHNOLOGY RESEARCH AND DEVELOPMENT CENTER, 2016

Waterproof organic/inorganic hybrid perovskite solar cells that maintain high efficiency in humid environments. The method involves a multi-step process to create a dense TiO2 layer on the substrate, followed by a perovskite layer deposition process. The perovskite layer is prepared through a controlled spin-coating process with specific molar mass ratios and processing conditions. The dense TiO2 layer prevents water and CH4 from reaching the perovskite material, while the perovskite layer itself maintains its photoelectric performance. The dense TiO2 layer is then followed by an alumina dense layer for enhanced durability.

CN105470394A-patent-drawing

19. Photovoltaic Cells with Composite Interfacial Layers and Perovskite Active Layers Featuring Sub-Layered Architecture

HUNT ENERGY ENTPR LLC, 2015

Photovoltaic cells and other electronic devices that enhance solar energy conversion through novel material architectures. The invention introduces composite interfacial layers and perovskite active layers that combine superior properties from each component. The composite interfacial layers, comprising interfacial material, mesoporous material, and charge transport material, provide enhanced surface contact and electrical conductivity. The perovskite active layers, incorporating charge transport materials, liquid electrolytes, and photoactive materials, enable efficient charge separation and carrier transport. The composite interfacial layers and perovskite active layers are arranged in sub-layers to achieve high contact surface areas, while maintaining optimal device performance.

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