一种基于钙钛矿吸光层的光伏器件及其制备方法
By using a barrier sheet to cover the ammonium salt solution during the perovskite annealing process, the problem of easy decomposition of perovskite films was solved, the performance and stability of photovoltaic devices were improved, and high photoelectric conversion efficiency was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WUHAN UNIV
- Filing Date
- 2022-11-28
- Publication Date
- 2026-07-17
AI Technical Summary
Perovskite thin films are prone to decomposition during the preparation process, resulting in poor performance of photovoltaic devices. Furthermore, existing methods are insufficient to effectively suppress this decomposition, which affects the stability and efficiency of the devices.
By using a surface-coated barrier film, the volatilization of ammonium salt is prevented during the perovskite annealing process. A high-quality perovskite light-absorbing layer film is formed by spin-coating PbI2 and ammonium salt solution and covering it with the barrier film for annealing.
It effectively suppressed the decomposition of perovskite, improved crystallinity, reduced defect state density, and changed conductivity, thereby improving the performance and stability of photovoltaic devices, with a wider bandgap and a lower probability of deep-level defects.
Smart Images
Figure CN115915879B_ABST