420 nm thick <inline-formula> <img src="cpb_27_1_018804_ieqn1.gif"/> </inline-formula> capping layers for efficient TiO<sub>2</sub> nanorod array perovskite solar cells

420 nm thick

capping layers for efficient TiO₂ nanorod array perovskite solar cells

Li Long, Shi Cheng-Wu^†, Deng Xin-Lian, Wang Yan-Qing, Xiao Guan-Nan, Ni Ling-Ling

Cross-sectional and surface SEM images of the CH₃NH₃PbI_3−xBr_x capping layers using (a), (d) 1.3 M, (b), (e) 1.5 M, and (c), (f) 1.7 M complex precursor solutions.