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Title: A plasmonically enhanced polymer solar cell with gold–silica core–shell nanorods
Authors: Heeger, Alan J.
Xu, Xiaoyan
Kyaw, Aung Ko Ko
Peng, Bo
Zhao, Dewei
Wong, Terence Kin Shun
Xiong, Qihua
Sun, Xiaowei
Keywords: Polymer solar cells
Au nanorods
Metallic nanoparticles
Plasmonic effects
Issue Date: 2013
Source: Xu, X., Kyaw, A. K. K., Peng, B., Zhao, D., Wong, T. K. S., Xiong, Q., et al. (2013). A plasmonically enhanced polymer solar cell with gold–silica core–shell nanorods. Organic electronics, 14(9), 2360-2368.
Series/Report no.: Organic electronics
Abstract: We report the use of chemically synthesized gold (Au)–silica core–shell nanorods with the length of 92.5 ± 8.0 nm and diameter of 34.3 ± 4.0 nm for the efficiency enhancement of bulk heterojunction (BHJ) polymer solar cells. Silica coated Au nanorods were randomly blended into the BHJ layers of these solar cells. This architecture inhibits the carrier recombination at the metal/polymer interface and effectively exploits light absorption at the surface plasmon resonance wavelengths of the Au–silica nanorods. To match the two plasmon resonant peaks of the Au–silica nanorods, we employed a low bandgap polymer, poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′] dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT) to construct a solar cell. The absorption spectrum of PCPDTBT:[6,6]-phenyl-C71-butyric acid methyl ester (PC70BM) is relatively wide and matches the two plasmon resonance peaks of Au–silica nanorods, which leads to greater plasmonic effects. We also constructed the poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PC60BM) cells for comparison. The absorption spectrum of P3HT:PC60BM only overlaps one of the plasmon resonance peak of Au–silica nanorods. The efficiency of the P3HT:PC60BM device incorporating optimized Au–silica nanorods is enhanced by 12.9% from 3.17% to 3.58%, which is due to the enhanced light absorption. Compared with the P3HT:PC60BM device with Au–silica nanorods, the PCPDTBT:PC70BM device with 1 wt% Au–silica nanorods concentration has a higher efficiency of 4.4% with an increase of 26%.
ISSN: 1566-1199
DOI: 10.1016/j.orgel.2013.05.038
Rights: © 2013 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Organic Electronics, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
SPMS Journal Articles

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