He Fang, Xu Wenzhan, Zhang Meng, Zhang Xuan, Ding Baofu, Wei Guodan, Kang Feiyu
Tsinghua-Berkeley Shenzhen Institute (TBSI), Tsinghua University Shenzhen 518000 China
Tsinghua Shenzhen International Graduate School, Tsinghua University Shenzhen 518000 China.
RSC Adv. 2019 Sep 26;9(52):30534-30540. doi: 10.1039/c9ra06363c. eCollection 2019 Sep 23.
All-inorganic CsPbIBr shows high thermal stability for promising application in perovskite solar cells (PSCs). The performance of PSCs is significantly affected by their morphology and crystallinity induced by compositional ratio, solvent/anti-solvent engineering and post thermal annealing. In this study, the compositional ratio effect of two precursors, PbI and CsBr, on the power conversion efficiency (PCE) of a device with ITO/SnO/CsPbIBr/Spiro-MeOTAD/Au structure was investigated. With the assistance of anti-solvent chlorobenzene, perovskite with a PbI : CsBr ratio of 1.05 : 1 showed a high quality thin film with higher crystallinity and larger grain size. In addition, the molar ratio of precursors PbI and CsBr improved the PCE of the PSCs, and the PSCs fabricated using the perovskite with an optimal ratio of PbI and CsBr exhibited a PCE of 13.34%.
全无机CsPbIBr在钙钛矿太阳能电池（PSC）中具有很高的热稳定性，有望得到应用。PSC的性能受到其由组成比例、溶剂/反溶剂工程和热退火后处理所诱导的形貌和结晶度的显著影响。在本研究中，研究了两种前驱体PbI和CsBr的组成比例对具有ITO/SnO/CsPbIBr/Spiro-MeOTAD/Au结构的器件的功率转换效率（PCE）的影响。在反溶剂氯苯的辅助下，PbI : CsBr比例为1.05 : 1的钙钛矿显示出高质量的薄膜，具有更高的结晶度和更大的晶粒尺寸。此外，前驱体PbI和CsBr的摩尔比提高了PSC的PCE，使用具有最佳PbI和CsBr比例的钙钛矿制备的PSC的PCE为13.34%。
