低压气相辅助溶液法制备无铅铋基钙钛矿太阳电池的研究  

LEAD-FREE BISMUTH BASED PEROVSKITE SOLAR CELLS OBTAINED BY LOW-PRESSURE VAPOR ASSISTED SOLUTION PROCESS

作　　者：赵晨旭 许佳[1] 陈晶[1] 李吉红 戴松元[1,2] 姚建曦[1,3] Zhao Chenxu;Xu Jia;Chen Jing;Li Jihong;Dai Songyuan;Yao Jianxi(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China;Beijing Key Laboratory of Novel Film Solar Cell,North China Electric Power University,Beijing 102206,China;Beijing Key Laboratory of Energy Safety and Clean Utilization,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,北京102206 [2]华北电力大学新型薄膜太阳电池北京市重点实验室,北京102206 [3]华北电力大学能源的安全与清洁利用北京市重点实验室,北京102206

出　　处：《太阳能学报》2021年第5期234-239,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51772095)。

摘　　要：采用低压气相辅助溶液法制备MA_(3)Bi_(2)I_(9)钙钛矿太阳电池,制备了晶粒大小为300 nm,表面致密且粗糙低的MA_(3)Bi_(2)I_(9)钙钛矿薄膜,其吸收边位置在598 nm,光学吸收带隙为2.07 eV。还通过对一步溶液法、两步溶液法和低压气相辅助溶液法3种方法制备的MA_(3)Bi_(2)I_(9)钙钛矿太阳电池进行对比发现,与其他2种方法制备的钙钛矿薄膜呈现二维片状晶体结构不同,通过低压气相辅助溶液法制备的MA_(3)Bi_(2)I_(9)钙钛矿薄膜更为致密,晶粒大小均匀。通过研究发现,该薄膜均匀的表面形貌有效抑制了薄膜内部载流子的复合,载流子瞬态荧光寿命由7.17 ns提升至8.81 ns,制备的钙钛矿太阳电池效率为0.178%,比一步溶液法和两步溶液法制备的太阳电池效率提升了2倍。In this paper,MA_(3)Bi_(2)I_(9)solar cells are prepared by low-pressure vapor assisted solution process(LP-VASP).Through this process,films with grain sizes of 300 nm and low roughness are acquired,and the absorption edge position is at 598 nm with optical absorption band gap of 2.07 eV.In addition,compared with the films prepared by one-step solution process or two-step solution process,the MA_(3)Bi_(2)I_(9)perovskite films prepared by LP-VASP possess compact,large-grained surfaces which are different from the films prepared by the other two methods.It is found that the films prepared by LP-VASP effectively inhibit the carriers recombination,and the carrier internal fluorescence lifetime of the films is increased from 7.17 ns to 8.81 ns.The best efficiency is 0.178%,which is twice the efficiencies of the solar cells prepared by the other two methods.

关 键 词：铋化物 钙钛矿太阳电池 吸收 低压气相辅助溶液法 

分 类 号：TM914.4[电气工程—电力电子与电力传动]