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Title: Enhanced photovoltaic performance of nanowire array solar cells with multiple diameters
Authors: Yan, X
Gong, L
Ai, LM
Wei, W 
Zhang, X
Ren, XM
Issue Date: 2018
Publisher: Optical Society of America
Source: Optics express, 24 Dec. 2018, v. 26, no. 26, p. A974-A983 How to cite?
Journal: Optics express 
Abstract: A multi-diameter p-i-n junction GaAs nanowire (NW) array architecture is proposed for high-performance solar cells. Coupled three-dimensional optoelectronic simulations are performed to investigate the photovoltaic properties. The NW diameters are randomly selected within the range of 220-400 nm, following the Gaussian distribution. The results show that the absorption strongly depends on the diameter. and the multi-diameter NW array exhibits higher optical absorption, in comparison with the uniform-diameter counterpart. This is because of the superposition of multiple absorption peaks. Moreover, the multi-diameter NW array can efficiently enhance the effective absorption; that is, the depletion region absorption, which directly leads to increased photocurrent. A remarkable efficiency of 17% is obtained for a 16-diameter NW array solar cell with a full width at half maximum of the diameter distribution of 75 nm, higher than the best value (16.1%) of uniform-diameter device with an optimum diameter of 310 nm. This work demonstrates that the native diameter nonuniformity of self-organized nanowires is beneficial for high-performance photovoltaics with low cost and a simple fabrication process.
EISSN: 1094-4087
DOI: 10.1364/OE.26.00A974
Rights: © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement (
© 2018 Optical Society of America. Users may use, reuse, and build upon the article, or use the article for text or data mining, so long as such uses are for non-commercial purposes and appropriate attribution is maintained. All other rights are reserved.
Journal © 2018
The following publication Yan, X., Gong, L., Ai, L. M., Wei, W., Zhang, X., & Ren, X. M. (2018). Enhanced photovoltaic performance of nanowire array solar cells with multiple diameters. Optics Express, 26(26), A974-A983 is available at
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