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) Nyquist plots of the TiO2 nanorod array perovskite solar cells with 290 nm (a, a-fit), 360 nm (b, b-fit), and 420 nm (c, c-fit) thick CH3NH3PbI3−xBrx capping layers.