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Light absorption mechanism in organic solar cells with hexagonal lattice nanohole aluminum transparent electrodes

Du, Qing Guo and Ren, Hengjiang and Wu, Lin and Bai, Ping and Png, Ching Eng and Sun, Xiao Wei and Kam, Chan Hin and Martijn de Sterke, C. (2015) Light absorption mechanism in organic solar cells with hexagonal lattice nanohole aluminum transparent electrodes. Journal of Optics, 17 (8). Art. No. 085901. ISSN 2040-8978.

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We present the design of an organic solar cell (OSC), integrated with nanohole patterned aluminum electrode with hexagonal lattice and analyze the light absorption mechanism in detail. The periodic nanohole pattern in the electrode excites a resonant waveguide mode which localizes the electromagnetic fields into the active layer at the long wavelengths where the active material usually has a relatively low absorption coefficient. The calculated maximum achievable photocurrent density indicates that OSC integrated with nanohole patterned aluminum electrode shows slightly better performance compare to that of the conventional OSC integrated with an indium tin oxide electrode. Moreover, the waveguide mode can be tuned by varying the period of the nanohole array and the thickness of nanocrystalline zinc oxide for different kinds of cell structures. By combining with other strategies to enhance the absorption at the short wavelength, our finding provides a promising way to further improve the efficiency of the OSCs.

Item Type:Article
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Du, Qing Guo0000-0001-9283-7323
Additional Information:© 2015 IOP Publishing Ltd. Received 8 May 2015, revised 4 June 2015; Accepted for publication 8 June 2015; Published 20 July 2015. The work by C M de Sterke was partly supported by ARC Discovery Grant DP130101009.
Funding AgencyGrant Number
Australian Research CouncilDP130101009
Subject Keywords:transparent electrode, organic solar cell, waveguide mode
Issue or Number:8
Record Number:CaltechAUTHORS:20151027-090802458
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61539
Deposited By: Tony Diaz
Deposited On:27 Oct 2015 16:13
Last Modified:09 Mar 2020 13:18

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