摘要：为改善薄膜表面形貌,减少界面复合的发生,提高短路电流密度,从而提高电池的光电转换效率,采用无毒的乙酸乙酯与异丙醇双组分反溶剂实现钙钛矿薄膜的绿色制备,进而通过掺杂碳量子点实现对薄膜形貌的控制;并对钙钛矿薄膜进行光吸收、XRD、瞬态荧光光谱、IPCE等测试。结果表明:双组分反溶剂可提高薄膜的光吸收度并且提高钙钛矿薄膜的纯净度;碳量子点的加入改善界面载流子的传输,提升电池的短路电流密度;使用混合反溶剂法获得16. 3%的光电转换效率,碳量子点掺杂对电池的光电转换效率提升18. 2%。
Abstract: In order to improve the surface morphology of the film，reduce the occurrence of interfacial carrier recombination，increase the short-circuit current density，and improve the PCE of the solar cells，the non-toxic EA and IPA two-component anti-solvent were used to achieve the green preparation of the perovskite film．Furthermore，the morphology of the film was controlled by doping carbon quantum dots．The perovskite film was tested by light absorption，XＲD，TＲPL and IPCE．The results show that the two-component anti-solvent can improve the light absorption of the film and improve the purity of the perovskite film．The addition of carbon quantum dots improves the transport of interface carriers and the short-circuit current density of the solar cells．A PCE of 16．3% is obtained by mixed anti-solvent method，and the PCE of the carbon quantum dots doped device is increased to 18．2% ．
Keywords: perovskite solar cell; green anti-solvent; carbon quantum dot
