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

(color online) UV–Vis–NIR absorption spectra of CH₃NH₃PbI_3−xBr_x capping layers using (i) 1.3 M, (ii) 1.5 M, and (iii) 1.7 M complex precursor solutions.