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Efficiency Enhancement of Hybrid Perovskite Solar Cells With MEH-PPV Hole-Transporting Layers

Hsin-Wei Chen, Tzu-Yen Huang, Ting-Hsiang Chang, Yoshitaka Sanehira, Chung-Wei Kung, Chih-Wei Chu, Masashi Ikegami, Tsutomu Miyasaka, Kuo-Chuan Ho

Sci Rep. 2016 Oct 4;6:34319.

PMID: 27698464

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).

Chemicals Related in the Paper:

Catalog Number Product Name Structure CAS Number Price
AP138184368-A MEH-PPV average Mn 70,000-100,000 | MEH-PPV MEH-PPV average Mn 70,000-100,000 | MEH-PPV 138184-36-8 Price
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