Two-step processed efficient perovskite solar cells via improving perovskite/PTAA interface using solvent engineering in PbI<sub>2</sub> precursor

Two-step processed efficient perovskite solar cells via improving perovskite/PTAA interface using solvent engineering in PbI₂ precursor

Long Cao-Yu, Wang Ning, Huang Ke-Qing, Li Heng-Yue, Liu Biao, Yang Jun-Liang^‡

(a) XRD patterns of PbI₂ derived from different solvents. Star marked peaks are ascribed to PbI₂ (DMSO) complex phase. (b) Magnified XRD patterns in region of 2θ from 38° to 41°.