Increased efficiencies on CdTe solar cells via luminescence down-shifting with excitation energy transfer between dyes

Danos, Lefteris, Parel, Thomas, Markvart, Tom, Barrioz, Vincent, Brooks, William and Irvine, Stuart (2012) Increased efficiencies on CdTe solar cells via luminescence down-shifting with excitation energy transfer between dyes. Solar Energy Materials and Solar Cells, 98. pp. 486-490. ISSN 0927 0248

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Official URL: http://dx.doi.org/10.1016/j.solmat.2011.11.009

Abstract

The external quantum efficiencies of CdTe solar cells fabricated by the atmospheric pressure metal organic chemical vapour deposition (AP–MOCVD) method have been measured with one and two dye doped luminescence down-shifting (LDS) layers on top. Excitation energy transfer between the dyes is used to extend the absorption ability of the LDS layer to λ=350 nm and increase the external quantum efficiency (EQE) of the cells for wavelengths λ<540 nm. The observed increase in the EQE corresponds to a rise in the short circuit current density of 1.88 mA/cm2 under AM1.5G illumination spectra, which is equivalent to a 10% relative solar cell efficiency increase. A simple model is presented, which accounts for the absorption and photon collection efficiencies of the LDS layer.

Item Type: Article
Uncontrolled Keywords: Luminescence down-shifting; Excitation energy transfer; Cdte solar cells
Subjects: F200 Materials Science
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 23 Nov 2015 15:52
Last Modified: 30 Oct 2017 15:44
URI: http://nrl.northumbria.ac.uk/id/eprint/24699

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