Crystallization process of perovskite modified by adding lead acetate in precursor solution for better morphology and higher device efficiency
Crystallization process of perovskite modified by adding lead acetate in precursor solution for better morphology and higher device efficiency
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DOI：
10.1016/j.orgel.2017.01.022
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发表时间：
2017-04-01
影响因子：
3.2
通讯作者：
Song, Qun Liang
中科院分区：
文献类型：
--
作者：
Liu, De Bei;Wang, Gang;Song, Qun Liang
在本研究中，通过在空气中采用一步旋涂法制备钙钛矿太阳能电池，在基于氯化铅（PbCl₂）的前驱体中额外添加1%的醋酸铅（PbAc₂）进行改性，实现了15.20%的功率转换效率，这比未改性的纯PbCl₂前驱体所制备的参考电池的效率要高得多。钙钛矿薄膜质量提高且覆盖率增加是这种改进的原因。钙钛矿的成核速率和成核起始时间是钙钛矿结晶动力学的关键参数。通过向前驱体中添加1%的PbAc₂，钙钛矿晶体核的密度得到优化，从而获得了最佳的薄膜，进而实现了最高的器件性能。（C）2017爱思唯尔有限公司。保留所有权利。
The power conversion efficiency of 15.20% is achieved in this study for planar perovskite solar cells fabricated in air from one-step spin-coating lead chloride (PbCl2) based precursor modified by additional adding 1% lead acetate (PbAc2), much higher than the reference one from pure PbCl2 precursor without modification. A higher quality perovskite film with increased coverage is the reason for this improvement. The perovskite nucleation rate and start time of nucleation are key parameters of perovskite crystallization kinetics. By adding 1% PbAc2 to the precursor, the density of perovskite crystal nucleuses is optimized to achieve the best film and then the highest device performance. (C) 2017 Elsevier B.V. All rights reserved.