Direct formation of I3- ions in organic cation solution for efficient perovskite solar cells

作者：Sun, Qiang; Gong, Xiu; Li, Hao; Liu, Shuangshuang; Zhao, Xiaojuan; Shen, Yan; Wang, Mingkui^*

来源：Solar Energy Materials and Solar Cells, 2018, 185: 111-116.

DOI：10.1016/j.solmat.2018.05.017

• Perovskite
• Defect
• Recombination
• Solar cell
• Efficiency

This work presents an easy and controllable method for introducing I-3(-) ions into organic cation dripping solution via chemical reaction of I- +I-2 -> I-3(-) to effectively decrease the concentration of defects in organic -inorganic lead halide perovskite films. The perovskite solar cells based on additional I-3(-) ions exhibited better photovoltaic performance, with a maximum power conversion efficiency of 18.7%, being about 15% higher than that of the control device. The elucidation of defects and its suppression by employing additional I-3(-) ions provide an important direction for defects elimination and future enhancement of perovskite solar cells efficiency.

• 出版日期2018-10
• 单位华中科技大学