摘要
钙钛矿太阳能电池器件由于其能量转化效率迅速提高、且易于制备、低温制作等优点,目前成为了研究热点。其中钙钛矿薄膜层的结晶质量对光吸收、载流子传输等性质有很大的影响,因此成为其工艺的关键之一。钙钛矿薄膜可通过一步溶液法沉积得到,且可在空气中制备,但其结晶质量通常较低。采用反溶剂工程,可改善结晶质量。本文中,我们通过研究前驱体中物料比、旋涂工艺参数、反溶剂加入条件等对薄膜质量的影响,得出影响薄膜形成的主要原因是溶液溶度变化引起的形核与生长过程。通过使用反溶剂乙酸乙酯在大气环境制备钙钛矿薄膜,得到了表面平整,结晶质量好的致密钙钛矿薄膜,相应太阳能电池器件的光电转化效率达13.94%。
;Perovskite solar cell devices have been widely studied due to theit advantages such 2as tapid improvement of energy conversion efficiency,easy preparation and low temperature fabrication.The crystal quality of perovskite film has 12 great influence on the properties of light absorption and carrier cransmission;thus,it becomes one of the key processes.Perovskite films can be deposited by one--step solution method and can be prepared in ait,but theit crystallization quality is usually low.The erystallization quality can be improved by using anti-solvent engineering.In this paper,we have studied the influence of material ratio in the precursor,spinning process parameters,and addition condition of anti--solvent on the film quality.The main reason for the influence of the film formation is the nucleation and growth process caused by the change of solution solubility.Perovskite thin films were prepared in atmospheric environment with ethyl acetate as an anti-solvent,and the compact perovskite thin films with smooth surface and good erystallization quality were obtained.The photoelectric conversion efficiency of corresponding solar cell devices reached 13.94%.
作者
彭博
严铮洸
王凯文
马林
杜一平
周迎春
PENG Bo;YAN Zhengguang;WANG Kaiwen;MA Lin;DU Yiping;ZHOU Yingchun(Institute of Microstructure and Properties of Advanced Materials,Beijing University of Technology,Beijing,100124 China;Beijing Key Laboratory of Microstructure and Property of Solids,Beijing University of Technology,Beijing,100124 China)
出处
《科技创新导报》
2020年第25期61-66,共6页
Science and Technology Innovation Herald
基金
国家自然基金面上项目(有机钙钛矿类材料的结晶和损伤的原子尺度原位研究,项目编号:11674015)
北京市自然基金面上项目(外场控制的纳米螺旋结构生长,项目编号:2172005)。
关键词
钙钛矿太阳能电池
反溶剂
薄膜
结晶
Perovskite solar cell
Anti-solvent
Film
Crytallization
