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Title: Effect of shell thickness on small-molecule solar cells enhanced by dual plasmonic gold-silica nanorods
Authors: Xu, Xiaoyan
Du, Qingguo
Peng, Bo
Xiong, Qihua
Hong, Lei
Demir, Hilmi Volkan
Ko Kyaw, Aung Ko
Sun, Xiao Wei
Wong, Terence Kin Shun
Keywords: DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics
Issue Date: 2014
Source: Xu, X., Du, Q., Peng, B., Xiong, Q., Hong, L., Demir, H. V., et al. (2014). Effect of shell thickness on small-molecule solar cells enhanced by dual plasmonic gold-silica nanorods. Applied physics letters, 105(11).
Series/Report no.: Applied physics letters
Abstract: Chemically synthesized gold (Au)-silica nanorods with shell thickness of 0 nm–10 nm were incorporated into the bulk heterojunction of a small-molecule organic solar cell. At optimal (1 wt. %) concentration, Au-silica nanorods with 5 nm shell thickness resulted in the highest power conversion efficiency of 8.29% with 27% relative enhancement. Finite-difference time-domain simulation shows that the localized electric field intensity at the silica shell-organic layer interface decreases with the increase of shell thickness for both 520 nm and 680 nm resonance peaks. The enhanced haze factor for transmission/reflection of the organic layer is not strongly dependent on the shell thickness. Bare Au nanorods yielded the lowest efficiency of 5.4%. Light intensity dependence measurement of the short-circuit current density shows that the silica shell reduces bimolecular recombination at the Au surface. As a result, both localized field intensity and light scattering are involved in efficiency enhancement for an optimized shell thickness of 5 nm.
DOI: 10.1063/1.4896516
Rights: © 2014 AIP Publishing LLC. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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