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Issue 7, 2012
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High efficiency polymer solar cells based on poly(3-hexylthiophene)/indene-C70 bisadduct with solvent additive

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Abstract

The photovoltaic performance of the polymer solar cells (PSCs) based on poly(3-hexylthiophene) (P3HT) as donor and indene-C70 bisadduct (IC70BA) as acceptor was optimized by using 3 vol% high boiling point solvent additive of 1-chloronaphthalene (CN), N-methyl pyrrolidone (NMP), 1,8-octanedithiol (OT) or 1,8-diiodooctane (DIO) without solvent annealing. The optimized PSC based on P3HT : IC70BA (1 : 1, w/w) with 3 vol% CN and pre-thermal annealing at 150 °C for 10 min, exhibits a high power conversion efficiency (PCE) of 7.40% with Voc of 0.87 V, Jsc of 11.35 mA cm−2 and FF of 75.0%, under the illumination of AM1.5G, 100 mW cm−2. The PCE of 7.40%, the Voc of 0.87 V, and the FF of 75.0% are all the highest values reported in the literature so far for P3HT-based PSCs. The high efficiency is due to the optimized P3HT/IC70BA interpenetrating network and stronger absorption of the active layer by using the additive treatment. Taking into account the advantages of thickness-insensitivity and good reproducibility of the photovoltaic performance of the P3HT-based PSCs as well as the simple device fabrication processes without the need of solvent annealing, the high-efficiency PSCs based on P3HT : IC70BA using CN additive are very promising for future commercialization of PSC devices.

Graphical abstract: High efficiency polymer solar cells based on poly(3-hexylthiophene)/indene-C70 bisadduct with solvent additive

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Publication details

The article was received on 25 Feb 2012, accepted on 30 Apr 2012 and first published on 30 Apr 2012


Article type: Paper
DOI: 10.1039/C2EE21481D
Citation: Energy Environ. Sci., 2012,5, 7943-7949
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    High efficiency polymer solar cells based on poly(3-hexylthiophene)/indene-C70 bisadduct with solvent additive

    X. Guo, C. Cui, M. Zhang, L. Huo, Y. Huang, J. Hou and Y. Li, Energy Environ. Sci., 2012, 5, 7943
    DOI: 10.1039/C2EE21481D

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