Two Low-Cost and Efficient Hole-Transporting Materials for n-i-p Type Organic-Inorganic Hybrid Perovskite Solar Cells

Bin-Bin Cui; Cheng Zhu; Shuangshuang Yang; Ying Han; Ning Yang; Liuzhu Zhang; Yue Wang; Yifei Jia; Lin Zhao; Qi Chen

doi:10.1021/acsomega.8b01817

Two Low-Cost and Efficient Hole-Transporting Materials for n-i-p Type Organic-Inorganic Hybrid Perovskite Solar Cells

ACS Omega. 2018 Sep 7;3(9):10791-10797. doi: 10.1021/acsomega.8b01817. eCollection 2018 Sep 30.

Authors

Bin-Bin Cui¹, Cheng Zhu¹, Shuangshuang Yang², Ying Han^{1

2}, Ning Yang^{1

2}, Liuzhu Zhang¹, Yue Wang¹, Yifei Jia¹, Lin Zhao¹, Qi Chen¹

Affiliations

¹ Advanced Research Institute of Multidisciplinary Science and Department of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.
² School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 102488, P. R. China.

Abstract

The simpler the design, the better and more effective it is. Two novel conjugated triarylamine derivatives in donor-π-donor structure employing biphenyl core and pyrene core as π-bridges, which are termed as Bp-OMe and Py-OMe, have been synthesized and characterized and then applied to perovskite solar cells (PSCs) as hole-transport materials (HTMs) successfully. Using 2,2',7,7'-tetrakis(N,N-di-p-methoxy-phenylamine)-9,9'-spirobiuorene (spiro-OMeTAD) as a relative reference, Py-OMe-based PSCs showed the best power conversion efficiency (PCE) of 19.28% under AM 1.5 G illumination at 100 mW cm^-2, which is comparable to that of PSCs based on spiro-OMeTAD with a best PCE of 18.57% with doping. Although Bp-OMe-based PSCs performed with relatively poor PCEs (best PCE of 15.06%) than those of Py-OMe-based PSCs, attributing to the poor planarity and hole mobility, taking the cost into consideration, Bp-OMe and Py-OMe are much more likely to be promising efficient HTMs for PSCs.