分别在钙钛矿前驱体中添加一系列的反溶剂乙酸乙酯（EA）和乙腈（ACN）,制备出不同形貌的CsPbBr3薄膜,探究薄膜质量与太阳电池性能的内在联系。结果表明,在大气制备环境中,反溶剂有助于CsPbBr3晶粒的生长,薄膜表面缺陷明显减少,太阳电池各性能参数（短路电流密度、开路电压以及填充因子）均有所提升,尤其是添加乙腈（V（PbBr2/DMF）∶V（ACN）=10∶1）后,光电转换效率（PCE）从3.16%提高到7.10%。
Abstract
In this paper, a series of antisolvent ethyl acetate （EA） and acetonitrile （ACN） were added to the perovskite precursor to prepare CsPbBr3 thin films with different morphologies, and the effect of thin film quality on the performance of perovskite solar cells was studied. Research results show that in the atmosphere preparation environment, the antisolvent can promote the growth of CsPbBr3 grain, the surface defects of the film are significantly reduced, and the short circuit current density, open circuit voltage and filling factor of the prepared FTO/TiO2/CsPbBr3/Carbon structure solar cells are improved. In particular, when acetonitrile （V（PbBr2/DMF）∶V（ACN） is 10∶1） was added, the solar cell photoelectric conversion efficiency （PCE） was increased from 3.16% to 7.10%.
关键词
钙钛矿太阳电池 /
太阳电池效率 /
薄膜制备 /
缺陷 /
反溶剂 /
CsPbBr3
Key words
perovskite solar cells /
solar cell efficiency /
film preparation /
defect /
antisolvent /
CsPbBr3
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基金
国家自然科学基金（21701041）; 太阳能高效利用湖北省协同创新中心开放研究基金(HBSKFQN2017001); 湖北工业大学博士启动基金（BSQD20170101）
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