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Issue 42, 2012
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Plasmonic backscattering enhancement for inverted polymer solar cells

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Abstract

The enhanced performance of inverted polymer solar cells enabled by a plasmonic backscattering effect is reported upon. To produce localized surface plasmons (LSPs) at the rear anode, thermally deposited Ag nanoparticles (NPs) are embedded in the MoO3 hole extraction layer. Upon optimizing the MoO3/Ag NPs/MoO3 sandwich structure, enhanced light harvesting is achieved via plasmonic backscattering into the photoactive layer of poly(3-hexylthiophene)/[6,6]-phenyl-C61 butyric acid methyl ester (P3HT:PCBM), resulting in an increase in photocurrent without sacrificing electrical properties, and ∼20% enhancement in power conversion efficiency, of 4.32% vs. 3.61% of the reference device. The performance improvement of the inverted PSCs is ascribed to the enhanced light absorption as a result of the light backscattering as well as the excitation of LSPs induced by Ag NPs embedded in the MoO3 layer. The present method provides a promising pathway for the fabrication of high-efficiency PSCs in an inexpensive and scalable way.

Graphical abstract: Plasmonic backscattering enhancement for inverted polymer solar cells

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Publication details

The article was received on 23 Jul 2012, accepted on 10 Sep 2012 and first published on 11 Sep 2012


Article type: Paper
DOI: 10.1039/C2JM34856J
Citation: J. Mater. Chem., 2012,22, 22781-22787
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    Plasmonic backscattering enhancement for inverted polymer solar cells

    P. Cheng, G. Ma, J. Li, Y. Xiao, Z. Xu, G. Fan, Y. Li, S. Lee and J. Tang, J. Mater. Chem., 2012, 22, 22781
    DOI: 10.1039/C2JM34856J

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