title: Efficiency Enhancement of Hybrid Perovskite Solar Cells with MEH-PPV Hole-Transporting Layers.
abstract: In this study, hybrid perovskite solar cells are fabricated using poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and poly(3-hexylthiophene-2,5-diyl) (P3HT) as dopant-free hole-transporting materials (HTMs), and two solution processes (one- and two-step methods, respectively) for preparing methylammonium lead iodide perovskite. By optimizing the concentrations and solvents of MEH-PPV solutions, a power conversion efficiency of 9.65% with hysteresis-less performance is achieved, while the device with 2,2',7,7'-tetrakis(N,N-di-p-methoxyphenylamine)-9,9'spirobifluorene (Spiro-OMeTAD) doped with lithium salts and tert-butylpyridine (TBP) exhibits an efficiency of 13.38%. This result shows that non-doped MEH-PPV is a suitable, low-cost HTM for efficient polymer-based perovskite solar cells. The effect of different morphologies of methylammonium lead iodide perovskite on conversion efficiency is also investigated by incident photon-to-electron conversion efficiency (IPCE) curves and electrochemical impedance spectroscopy (EIS).
authors.affiliation: Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
authors.forename: Hsin-Wei
authors.initials: HW
authors.lastname: Chen
authors.affiliation: Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.|Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan.
authors.forename: Tzu-Yen
authors.initials: TY
authors.lastname: Huang
authors.affiliation: Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
authors.forename: Ting-Hsiang
authors.initials: TH
authors.lastname: Chang
authors.affiliation: Graduate School of Engineering, Toin University of Yokohama, Yokohama 1614, Japan.
authors.forename: Yoshitaka
authors.initials: Y
authors.lastname: Sanehira
authors.affiliation: Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
authors.forename: Chung-Wei
authors.initials: CW
authors.lastname: Kung
authors.affiliation: Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan.
authors.forename: Chih-Wei
authors.initials: CW
authors.lastname: Chu
authors.affiliation: Graduate School of Engineering, Toin University of Yokohama, Yokohama 1614, Japan.
authors.forename: Masashi
authors.initials: M
authors.lastname: Ikegami
authors.affiliation: Graduate School of Engineering, Toin University of Yokohama, Yokohama 1614, Japan.
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Miyasaka
authors.affiliation: Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan.
authors.forename: Kuo-Chuan
authors.initials: KC
authors.lastname: Ho