基于混蒸工艺具有能带梯度的钙钛矿太阳能电池制备方法
By adjusting the ratio of PbI2 to SnI2 through a co-evaporation process, an inorganic lead-tin perovskite thin film with a band gradient was prepared, which solved the problem of low efficiency in all-inorganic lead-tin mixed perovskite solar cells and improved the photoelectric conversion efficiency and light absorption efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- UNIV OF ELECTRONICS SCI & TECH OF CHINA
- Filing Date
- 2023-03-17
- Publication Date
- 2026-07-17
AI Technical Summary
The low efficiency of all-inorganic lead-tin hybrid perovskite solar cells is mainly due to the excessively fast crystallization rate of tin-based perovskite, which leads to asynchronous crystallization of Pb and Sn perovskite. The low solubility of CsI in DMF and DMSO limits the film thickness, and the absorption spectrum of perovskite with a single Sn to Pb ratio is too narrow.
An inorganic lead-tin perovskite thin film with a band gradient was prepared on a conductive substrate by adjusting the ratio of PbI2 to SnI2 through a co-evaporation process, eliminating the hole transport layer and forming a CsPbI3/CsPb0.7Sn0.3I3/CsPb0.3Sn0.7I3/CsSnI3 structure. Metal electrodes were then prepared by spin coating and thermal evaporation.
This method improves the photoelectric conversion efficiency of inorganic lead-tin hybrid perovskite solar cells, broadens the absorption spectrum, enhances the open-circuit voltage and light absorption efficiency of the device, and simplifies the process flow.
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Figure CN116322080B_ABST