Highly efficient bifacial semitransparent perovskite solar cells based on molecular doping of CuSCN hole transport layer
Hou Shixin1, 2, 3, 4, 5, Shi Biao1, 2, 3, 4, 5, Wang Pengyang1, 2, 3, 4, 5, †, Li Yucheng1, 2, 3, 4, 5, Zhang Jie1, 2, 3, 4, 5, Chen Peirun1, 2, 3, 4, 5, Chen Bingbing1, 2, 3, 4, 5, Hou Fuhua1, 2, 3, 4, 5, Huang Qian1, 2, 3, 4, 5, Ding Yi1, 2, 3, 4, 5, Li Yuelong1, 2, 3, 4, 5, Zhang Dekun1, 2, 3, 4, 5, Xu Shengzhi1, 2, 3, 4, 5, Zhao Ying1, 2, 3, 4, 5, Zhang Xiaodan1, 2, 3, 4, 5, ‡
       

XPS spectra of CuSCN and F4TCNQ-doped CuSCN for the core level of Cu 2p (a), S 2p (b), C 1s (c), and N 1s (d); the core level of Cu 2p1/2 shifted ≈ 0.22 eV and Cu 2p3/2 shifted ≈ 0.27 eV after molecular doped; the core level of S 2p shifted ≈ 0.34 eV after molecular doped; the core level of C 1s shifted ≈ 0.15 eV after molecular doped; the core level of S 2p shifted ≈ 0.26 eV after molecular doped.