Perovskite solar cell towards lower toxicity: a theoretical study of physical lead reduction strategy

作     者：Yifan Zheng Rui Su Zhaojian Xu Deying Luo Hua Dong Bo Jiao Zhaoxin Wu Qihuang Gong Rui Zhu 

作者机构：State Key Laboratory for Mesoscopic Physics School of Physics Nano-optoelectronics Frontier Center of Ministry of Education (NFC-MOE)& Collaborative Innovation Center of Quantum Matter Peking University Beijing 100871 China Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan 030006 China Key Laboratory of Photonics Technology for Information Key Laboratory for Physical Electronics and Devices of the Ministry o f Education Department o f Electronic Science and Technology School of Electronic and Information Engineering Xi'an Jiaotong University Xi'an 710049 China 

出 版 物：《Science Bulletin》 (科学通报（英文版）)

年 卷 期：2019年第64卷第17期

页      面：1255-1261页

核心收录：

学科分类：07[理学] 08[工学] 

基　　金：supported by the National Basic Research Program of China (2015CB932203) the National Natural Science Foundation of China (91733301, 61722501, 61377025, 91433203, and 61604121) Postdoctoral Innovative Talents Support Project (8206200013) 

主　　题：Perovskite solar cell Physical lead reduction Low toxicity Optical space layer Transfer matrix model 

摘      要：The huge performance enhancements of the organometal halide perovskite solar cells(OHPSCs) have appealed enormous attention within recent ten years. Although the rapid growth of the device power conversion efficiency(PCE) has attained over 25%, the contamination of health-hazardous components still holds back its sustainable applications. To reduce the lead usage, many groups have tried chemical lead reduction solutions: substituting the lead by other group 14 metal elements to realize the low-lead OHPSCs. Unfortunately, neither the PCE nor the stability, low-lead OHPSCs all lag far behind the state-ofthe-art conventional lead-based OHPSCs. In this work, we present a physical lead reduction(PLR) concept by reducing the perovskite film thickness to restrict the perovskite hazard risk with minor scarification in device performances. Through the simulation of transfer matrix model, we theoretically demonstrated that by introducing the optical space layer, the device PCE could maintain 96% of the original maximum value while attenuating the perovskite film thickness to one-third. This means that the usage of lead can be reduced by $70% with PLR concept, which could have broad appeal as a new lead reduction strategy towards high performance OHPSCs.