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Energies 2017, 10(5), 707; doi:10.3390/en10050707

ITO-Free Transparent Organic Solar Cell with Distributed Bragg Reflector for Solar Harvesting Windows

1
Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
2
Department of Chemistry, University of Massachusetts Amherst, Amherst, MA 01003, USA
3
Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53706, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Hongxing Yang
Received: 30 March 2017 / Revised: 8 May 2017 / Accepted: 11 May 2017 / Published: 17 May 2017
(This article belongs to the Special Issue Solar Energy Application in Buildings)
View Full-Text   |   Download PDF [5288 KB, uploaded 17 May 2017]   |  

Abstract

We demonstrated an indium tin oxide (ITO)-free, highly transparent organic solar cell with the potential to be integrated into window panes for energy harvesting purposes. A transparent, conductive ZnO/Ag/ZnO multilayer electrode and a Ag:Ca thin film electrode were used in this transparent device as the bottom and top electrode, respectively. To further improve the transmittance of the solar cell, the thickness of the top ZnO layer was investigated both experimentally and with simulations. An average visible transmittance of >60% was reached, with a maximum transmittance of 73% at 556 nm. Both top and bottom illumination of the solar cell generated comparable power conversion efficiencies, which indicates the wide application of this solar cell structure. In addition, we fabricated distributed Bragg reflector mirrors with sputtered SiO2 and TiO2, which efficiently increased the power conversion efficiency over 20% for the solar cells on glass and poly(ethylene terephthalate) (PET) substrates. View Full-Text
Keywords: transparent electrode; organic photovoltaic; distributed Bragg reflector transparent electrode; organic photovoltaic; distributed Bragg reflector
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Peng, Y.; Zhang, L.; Cheng, N.; Andrew, T.L. ITO-Free Transparent Organic Solar Cell with Distributed Bragg Reflector for Solar Harvesting Windows. Energies 2017, 10, 707.

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