Danos, L. and Parel, T. and Markvart, T. and Barrioz, V. and Brooks, W. S. M. and Irvine, S. J. C. (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
Full text not available from this repository.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 lambda=350 nm and increase the external quantum efficiency (EQE) of the cells for wavelengths lambda <540 nm. The observed increase in the EQE corresponds to a rise in the short circuit current density of 1.88 mA/cm(2) 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. (C) 2011 Elsevier B.V. All rights reserved.