High Efficiency over 20% of Perovskite Solar Cells by Spray Coating via a Simple Process
High Efficiency over 20% of Perovskite Solar Cells by Spray Coating via a Simple Process
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DOI：
10.1021/acsaem.0c01129
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发表时间：
2020-10-26
影响因子：
6.4
通讯作者：
Zhang, Jianjun
中科院分区：
文献类型：
--
作者：
Cai, Hongkun;Liang, Xiaojuan;Zhang, Jianjun
钙钛矿太阳能电池（PSC）因其高效率和低成本而发展迅速。 PSC 的性能主要取决于钙钛矿薄膜的质量，而钙钛矿薄膜的质量由制造工艺控制。对成核、结晶和生长过程的全面深入的了解对于进一步推进高质量钙钛矿薄膜的大规模制造势在必行。在这项工作中，在环境空气中系统地优化了钙钛矿薄膜的简单工艺参数，例如钙钛矿薄膜的厚度、反溶剂浴和热退火时间。通过这些简单的过程，可以控制和优化钙钛矿薄膜的湿膜、溶剂挥发和结晶。优化喷涂条件后，PSC的最佳功率转换效率（PCE）达到20.6%（反向扫描），并且电流密度-电压（J-V）几乎没有滞后。此外，未密封的装置保留了其原始PCE的85%，并且在干燥塔中储存650小时后表现出优异的长期稳定性。
The development of perovskite solar cells (PSCs) has progressed rapidly because of their high efficiency and low cost. The performance of PSCs is predominantly determined by the quality of the perovskite films, which is controlled by the fabrication process. The comprehensive and in-depth understanding of the nucleation, crystallization, and growth process are imperative for the further advancement of large-scale manufacturing of high-quality perovskite films. In this work, the simple process parameters of perovskite thin films were systematically optimized at ambient air, such as containing the thickness of the perovskite thin film, the anti-solvent bath, and the thermal annealing time. Through these simple processes, the wet film, solvent volatilization, and crystallization of perovskite films can be controlled and optimized. After optimizing the spraying conditions, the champion power conversion efficiency (PCE) of the PSCs achieved 20.6% (reverse scan) and had little hysteresis in the current density-voltage (J-V). In addition, the unsealed device retained 85% of its original PCE and showed excellent long-term stability after 650 h of storage in the drying tower.