Title: Efficiency enhancement of silicon solar cells through a downshifting and antireflective oxysulfide phosphor layer
Authors: Hung, Wen-Bin
Chen, Teng-Ming
Department of Applied Chemistry
Keywords: Silicon solar cells;Gd2O2S:Eu3+;Downshifting;Antireflection coating;Phosphor layer;Spin coating
Issue Date: 1-Feb-2015
Abstract: A simple, rapid, and low-cost anti-reflection coating (ARC) for polycrystalline silicon (pc-Si) solar cells has been developed by spin coating a solution of submicron spherical Gd2O2S:Eu3+ phosphor impregnated in a polyvinylpyrrolidone (PVP) matrix on the textured surface of the solar cell. Under a simulated one-sun illumination, this predesigned device achieved an enhancement of 6.74 mA/cm(2) in short-circuit current density and 2.76% in power conversion efficiency relative to those for a pristine cell. Based on photoluminescence, reflectance, and optical spectral studies, the underlying mechanism for these improvements can be attributed to the luminescent down-shifting (LDS) capability in the ultraviolet range and additional promotion of light absorption within the measured spectral region. Our results indicate that a suitable inorganic phosphor impregnated in a polymer matrix may potentially serve as a feasible solution to compensate for the spectral mismatch and Fresnel reflection loss of silicon solar cells. (C) 2014 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.solmat.2014.11.011
ISSN: 0927-0248
DOI: 10.1016/j.solmat.2014.11.011
Volume: 133
Begin Page: 39
End Page: 47
Appears in Collections:Articles