在空穴传输层Spiro-OMeTAD和Ag电极之间引入三氧化钼（MoO3）空穴修饰层,并研究其对空气中刮涂的钙钛矿太阳电池光伏性能的影响,结合导电性测试、稳态光致发光光谱和水接触角测试等探究其影响机制。实验和测试结果表明MoO3可提升空穴传输能力和减小界面电阻,同时对下方的Spiro-OMeTAD及钙钛矿起到保护作用,可减缓空气中水氧侵蚀。基于MoO3界面修饰层的在空气中刮涂制备的钙钛矿太阳电池光电转换效率由15.14%提升至18.30%,尤其是填充因子的平均值由60%提升至76%,电池稳定性得到改善,未封装电池在400 h后仍保持初始效率的90%。
Abstract
In this study, the influence of introducing MoO3 hole modification layer between hole transport layer Spiro-OMeTAD and Ag electrode on the photovoltaic performance of the blade-coated perovskite solar cell device was investigated. The mechanism was examined through a series of tests encompassing electrical conductivity measurement, steady-state photoluminescence spectra, contact angle with water, etc. The results of experiments and tests indicate that MoO3 can effectively improve hole transport capability and reduce interfacial resistance while protecting the underlying Spiro-OMeTAD and perovskite layers from water and oxygen degradation in the air. Based on MoO3 interface modification layers, the blade-coated perovskite solar cell device's photovoltaic conversion efficiency increases from 15.14% to 18.30%, especially the average fill factor rises from 60% to 76%. At the same time, the stability of devices is also improved, with the unpackaged device still maintaining 90% of it initial efficiency after 400 hours.
关键词
钙钛矿太阳电池 /
三氧化钼 /
热蒸镀 /
界面修饰 /
空穴传输 /
稳定性
Key words
perovskite solar cells /
molybdenum oxide /
thermal vapor deposition coating /
interface modification /
hole transport /
stability
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