Bromine Doping as an Efficient Strategy to Reduce the Interfacial Defects in Hybrid Two-Dimensional/Three-Dimensional Stacking Perovskite Solar Cells

• DOI: 10.1021/acsami.8b09461
• Publication Date: 2018-08-23T12:20:31Z
• Authors: Yanping Lv; Yantao Shi; Xuedan Song; Junxue Liu; Minhuan Wang; Shi Wang; Yulin Feng; Shengye Jin; Ce Hao
• Keywords: Passivation

Solar-to-electricity conversion efficiency, power efficiency (PCE), and stability are two important aspects of perovskite solar cells (PSCs). However, both difficult to simultaneously enhance. In the recent years, two-dimensional (2D)/three-dimensional (3D) stacking structure, designed by covering 3D with a thin 2D capping layer, was reported be promising method achieve higher PCE improved simultaneously. when reducing surface defects perovskite, layer itself may probably introduce additional interfacial in 2D/3D which is thought able trigger trap-assisted nonradiative recombination or ion migration. Thus, efforts should paid reduce hybrid serving as modification structure PSCs. Here, we demonstrate that bromine (Br) doping an efficient strategy passivate robustly, photoluminescence lifetime enhanced notably, whereas charge suppressed lot. As result, from 18.01% (3D perovskite) 20.07% (Br-doped along moisture stability.