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Large Orientation Angle Buried Substrate Enables Efficient Flexible Perovskite Solar Cells and Modules
Xinyu Tong1,2, Lisha Xie1, Jun Li1
1Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.
Advanced Materials (Deerfield Beach, Fla.)
|July 25, 2024
Summary
Researchers developed a new buried substrate, A-4PADCB, to improve flexible perovskite solar cells (f-PSCs). This innovation enhances contact, leading to higher power conversion efficiency and stability for portable solar applications.
Area of Science:
- Materials Science
- Renewable Energy
- Nanotechnology
Background:
- Flexible perovskite solar cells (f-PSCs) offer portability and efficiency but are limited by poor contact between perovskite layers and flexible substrates.
- Improving the interface quality of the buried substrate is crucial for enhancing the overall performance and stability of f-PSCs.
Purpose of the Study:
- To introduce a novel asymmetric π-extended self-assembled monolayer (SAM), A-4PADCB, as a buried substrate for efficient inverted f-PSCs.
- To investigate the effect of A-4PADCB on perovskite film growth, interface properties, and the performance of flexible solar devices.
Main Methods:
- Synthesis and characterization of the asymmetric SAM, A-4PADCB.
- Fabrication of inverted f-PSCs and flexible perovskite solar modules using A-4PADCB as the buried substrate.
- Performance evaluation including power conversion efficiency (PCE), stability tests (light, thermal, mechanical), and interface analysis.
Main Results:
- A-4PADCB demonstrated a significant orientation angle, improving contact potential distribution and SAM/perovskite interface quality.
- Optimized perovskite films with low defect density and slight tensile stress were achieved.
- Small-area f-PSCs reached PCEs up to 25.05%, and large-area modules achieved 20.64% (certified 19.51%).
- A-4PADCB-based f-PSCs exhibited enhanced operational stability under various stress conditions.
Conclusions:
- The designed A-4PADCB buried substrate effectively regulates perovskite growth and enhances interface properties.
- This strategy significantly boosts the efficiency and stability of flexible perovskite solar cells and modules.
- The findings present a promising pathway for the commercialization of large-area flexible perovskite photovoltaics.
