Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5466553 | Thin Solid Films | 2016 | 12 Pages |
Abstract
In this study, the substantial performance enhancement of crystalline silicon (C-Si) solar cells through the combined utilization of two luminescent down-shifting europium (Eu)-doped phosphor species in the silicate (SiO2) layer was experimentally demonstrated. The combination of emission wavelengths of 512Â nm and 550Â nm, of 512Â nm and 610Â nm, and of 550Â nm and 610Â nm from the two Eu-doped phosphor species, respectively, was proposed to achieve a broad band luminescent emission as well as a higher conversion efficiency. The surface morphologies and optical properties of the 3-wt.% Eu-doped phosphor species mixed with SiO2 solution coated on C-Si solar cells via a spin-on film technique were characterized by scanning electron microscopy, photoluminescence, optical reflectance, external quantum efficiency, and photovoltaic current density-voltage measurements under one sun AM 1.5G illumination. The short-circuit current density enhancement (ÎJsc) of the Si solar cells with Eu-doped phosphor particles on a SiO2 layer was 4-9% higher than that of cells with only a SiO2 layer. A ÎJsc of 19.85% and a conversion efficiency enhancement of 15.97% for the cells with the combination of two Eu-doped phosphor species with emission wavelengths of 512Â nm and 610Â nm were obtained due to broad band luminescent emission and forward light scattering.
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Authors
Wen-Jeng Ho, Yu-Tang Shen, Yu-Jie Deng, Chien-Wu Yeh, Ruei-Siang Sue,