物理学报2024，Vol.73Issue(15)：224-234,11.DOI:10.7498/aps.73.20240561
丙胺盐酸盐辅助结合气淬法制备高效宽带隙钙钛矿太阳电池
Preparation of wide-bandgap perovskite thin films by propylamine hydrochloride assisted gas quenching method
摘要
Abstract
Perovskite is a material with excellent photovoltaic properties,and the efficiency of perovskite solar cells has increased rapidly in recent years.By utilizing the adjustable bandgap characteristics of perovskite materials,wide-bandgap perovskite solar cells can be combined with narrow-bandgap solar cells to make tandem solar cells.Tandem devices can improve the utilization of the solar spectra and achieve higher power conversion efficiency.An important prerequisite for preparing efficient photovoltaic devices is to fabricate high-quality perovskite active layers.Antisolvent-assisted spin-coating is currently a commonly used method for preparing high-quality perovskite films in the laboratory.However,the low solubility of inorganic cesium and bromine salts in the preparation of wide-bandgap perovskite thin films leads to a fast crystallization rate,poor crystallization quality and a large number of defects,seriously reducing the photovoltaic performance of the devices.In addition,the antisolvent has a narrow working window,which is not conducive to the preparation of large-area perovskite films.In this work,a mild gas quenching process is used to assist the spin-coating method in preparing wide-bandgap perovskite films,and propylamine hydrochloride is introduced as an additive to improve the crystallization quality and uniformity of large-area preparation of perovskite film.The interaction between the propylamine cation and the perovskite component produces a two-dimensional perovskite phase.Two-dimensional phase is used as the growth template for perovskite composition in order to reduce the formation energy of α-phase perovskite,which is beneficial to uniform nucleation and preferential orientation growth of perovskite,the increase of grain size and the decrease of grain boundaries within the film.The improvement of the crystalline quality of the perovskite film can reduce the defect density inside the film and suppress the non-radiative recombination of the photogenerated carriers.The perovskite solar cell with a bandgap of 1.68 eV,prepared by using this strategy,achieves a power conversion efficiency of 21.48%.In addition,the 8 cm×8 cm wide-bandgap perovskite films prepared by this method exhibit good uniformity.This work provides a strategy for developing the process of efficient and large-area perovskite photovoltaic devices.关键词
宽带隙钙钛矿/气淬法/丙胺盐酸盐/结晶Key words
wide-bandgap perovskite/gas quenching/propylamine hydrochloride/crystallization引用本文复制引用
杨静,韩晓静,刘冬雪,石标,王鹏阳,许盛之,赵颖,张晓丹..丙胺盐酸盐辅助结合气淬法制备高效宽带隙钙钛矿太阳电池[J].物理学报,2024,73(15):224-234,11.基金项目
中国长江三峡集团有限公司科研项目(批准号:202103571)、国家自然科学基金(批准号:62274099)和国家自然科学基金联合基金重点项目(批准号:U21A2072)资助的课题.Project supported by the Scientific Research Project of China Three Gorges Corporation(Grant No.202103571),the National Natural Science Foundation of China(Grant No.62274099),and the Key Program of the Joint Funds of the National Natural Science Foundation of China(Grant No.U21A2072). （批准号:202103571）
