CH_3NH_3PbI_3钙钛矿太阳电池晶粒尺寸及光电性能调控  

Grain Size and Photoelectric Performance Control of CH_3NH_3PbI_3 Perovskite Solar Cells

作　　者：郑建强 陈涛[1,2] 倪斌 范炜盛[1,2] 程国庆 王玉琦 ZHENG Jianqiang;CHEN Tao;NI Bin;FAN Weisheng;CHENG Guoqing;WANG Yuqi(Key Lab.of Material Physics,Institute of Solid State Physics,Hefei Institute of Physical Science of the Chinese Academy of Sciences,Hefei 230031,CHN;University of Science and Technol.of China,Hefei 230026,CHN;Anhui University,Hefei 230601,CHN)

机构地区：[1]中国科学院合肥物质科学研究院固体物理研究所材料物理重点实验室,合肥230031 [2]中国科学技术大学,合肥230026 [3]安徽大学,合肥230601

出　　处：《半导体光电》2018年第5期665-670,共6页Semiconductor Optoelectronics

基　　金：国家自然科学基金联合基金项目(U1632123);国家自然科学基金项目(51472247;51671182)

摘　　要：钙钛矿薄膜的晶粒尺寸对器件性能影响很大。采用湿润性不同的空穴传输层以及不同浓度的CH_3NH_3I(MAI)溶液,使用热退火和溶剂气氛退火的方法制备出CH_3NH_3PbI_3薄膜及相应电池。测量了不同制备条件的钙钛矿薄膜的X射线衍射、扫描电子显微镜、光致发光谱,以及器件的电流密度-电压曲线。结果表明,溶剂气氛退火可以有效地增大薄膜的晶粒尺寸,提高器件的电流密度;较高浓度的MAI能将PbI2完全转化为CH_3NH_3PbI_3,增大晶粒尺寸;不湿润的功函数更高的空穴传输层有利于电池效率的提高。制备了最高效率为13.3%的CH_3NH_3PbI_3钙钛矿电池,为制备更大晶粒的钙钛矿薄膜与更高效率的钙钛矿太阳电池奠定了基础。The perovskite film grain size has a great influence on the device performance.The hole transport layer with different wettability and CH3 NH3 I（MAI）solution with different concentrations were used to prepare the CH3NH3PbI3 perovskite films and solar cells by using the methods of thermal annealing and solvent annealing.The perovskite films prepared under different conditions were characterized by XRD,SEM and photoluminescence spectra,and the current density-voltage curves of the devices were measured.The results show that solvent annealing can effectively increase the grain size of the film and increase the current density of the device;a higher concentration of MAI solution can completely convert PbI2 to CH3NH3PbI3 and increase the grain size;the non-wetting hole transport layer with higher work function is beneficial to the increase of the cell power conversion efficiency.The perovskite solar cell with the highest efficiency of 13.3% was prepared,which laid the foundation for preparing perovskite thin films with larger grain size and perovskite batteries with high efficiency.

关 键 词：钙钛矿太阳电池 CH3NH3PbI3 溶剂退火 空穴传输层 

分 类 号：TM914.4[电气工程—电力电子与电力传动]