Wu Yinghui, Wang Dong, Liu Jinyuan, Cai Houzhi
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
Nanomaterials (Basel). 2021 Mar 18;11(3):775. doi: 10.3390/nano11030775.
Perovskite solar cells (PSCs) are the most promising substitute for silicon-based solar cells. However, their power conversion efficiency and stability must be improved. The recombination probability of the photogenerated carriers at each interface in a PSC is much greater than that of the bulk phase. The interface of a perovskite polycrystalline film is considered to be a defect-rich area, which is the main factor limiting the efficiency of a PSC. This review introduces and summarizes practical interface engineering techniques for improving the efficiency and stability of organic-inorganic lead halide PSCs. First, the effect of defects at the interface of the PSCs, the energy level alignment, and the chemical reactions on the efficiency of a PSC are summarized. Subsequently, the latest developments pertaining to a modification of the perovskite layers with different materials are discussed. Finally, the prospect of achieving an efficient PSC with long-term stability through the use of interface engineering is presented.
钙钛矿太阳能电池（PSC）是硅基太阳能电池最有前景的替代品。然而，它们的功率转换效率和稳定性必须得到提高。PSC中每个界面处光生载流子的复合概率远大于体相中的复合概率。钙钛矿多晶膜的界面被认为是缺陷丰富的区域，这是限制PSC效率的主要因素。本文综述并总结了提高有机-无机卤化铅PSC效率和稳定性的实用界面工程技术。首先，总结了PSC界面处的缺陷、能级排列和化学反应对PSC效率的影响。随后，讨论了用不同材料修饰钙钛矿层的最新进展。最后，展望了通过界面工程实现具有长期稳定性的高效PSC的前景。
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