宽带隙钙钛矿太阳能电池是晶硅-钙钛矿叠层电池的主要组成部分。由于宽带隙钙钛矿材料存在缺陷密度大、相分离严重等问题,限制了宽带隙钙钛矿太阳能电池的发展。为改善这些问题,提出了一种预旋涂方法,即两步法制备钙钛矿薄膜,在碘化铅层表面均匀涂覆甲胺乙醇溶液(MES)+苯乙基碘化铵(PEAI)完成预旋涂工艺。通过预旋涂后,器件最佳效率为20.81%,优于未预旋涂器件(19.7%)及单一PEAI预旋涂处理器件(20.2%),同时也表现出优良的稳定性。

Wide band gap perovskite solar cell is the main component of crystalline silicon-perovskite laminated cell.Due to the problems of high defect density and serious phase separation in wide band gap perovskite materials,the development of wide band gap perovskite solar cells is limited.In order to improve these problems,a pre-spin coating method is proposed,that is,a perovskite thin film is prepared by two-step method,and methylamine ethanol solution (MES) and phenylethyl ammonium iodide (PEAI) are evenly coated on the surface of lead iodide layer to complete the pre-spin coating process.After pre-spin coating,the best efficiency of the device is 20.81%,which is better than that of the device without pre-spin coating (19.7%) and the device with single PEAI pre-spin coating (20.2%),and it also shows excellent stability.

谭理(1996-),男,硕士生,研究方向为钙钛矿太阳能电池,329357020@qq.com;李海进(1989-),男,博士,讲师,研究方向为钙钛矿太阳能电池,通讯联系人,haijinli@swpu.edu.cn。