Hydrazinium Salt as Additive To Improve Film Morphology and Carrier Lifetime for High-Efficiency Planar-Heterojunction Perovskite Solar Cells via One-Step Method
Hydrazinium Salt as Additive To Improve Film Morphology and Carrier Lifetime for High-Efficiency Planar-Heterojunction Perovskite Solar Cells via One-Step Method
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肼盐作为添加剂通过一步法改善高效平面异质结钙钛矿太阳能电池的薄膜形态和载流子寿命
DOI：
10.1021/acsami.7b11168
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发表时间：
2017
影响因子：
9.5
通讯作者：
Wei Huang
中科院分区：
文献类型：
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作者：
Xin Zhang;Sijian Yuan;Haizhou Lu;Huotian Zhang;Pengfei Wang;Xiaolei Cui;Yin Zhang;Qi Liu;Jiao Wang;Yiqiang Zhan;Zhengyi Sun;Wei Huang
一步溶液法是制备有机-无机金属卤化物钙钛矿薄膜最简单的方法，但由于薄膜形貌普遍较差，在平面异质结太阳能电池中应用效果不佳。本研究表明，在前驱体溶液中加入氯化肼可以制备出覆盖率更高、结晶度更好的钙钛矿薄膜。光吸收能力和载流子寿命均有显著提高。在最佳添加比下，倒置PHJ钙钛矿太阳能电池的平均功率转换效率（PCE）提高了70%，冠军器件的PCE达到了令人满意的12.66%。这些结果表明，N2H5Cl是一种有前途的添加剂，可以通过一步法制造高效钙钛矿太阳能电池，这可能是未来商业太阳能电池工业的兴趣。
One-step solution process is the simplest method to fabricate organic–inorganic metal halide perovskite thin films, which however does not work well when employed in the planar-heterojunction (PHJ) solar cells due to the generally poor film morphology. Here we show that hydrazinium chloride can be used as an additive in the precursor solution to produce perovskite films featuring higher coverage and better crystallinity. The light absorption ability and charge carrier lifetime are both significantly improved accordingly. Under the optimal additive ratio, the average power conversion efficiency (PCE) of the inverted PHJ perovskite solar cells greatly increases by as much as 70%, and the champion device shows a satisfying PCE of 12.66%. These results suggest that N2H5Cl is a promising additive for fabricating high-efficiency perovskite solar cells via one-step method, which could be of interest in the future commercial solar cell industry.