Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6534869 | Solar Energy Materials and Solar Cells | 2016 | 5 Pages |
Abstract
Silver nanoparticle (Ag NP) enhanced back reflector (BR) has been used for effective light trapping in thin-film silicon solar cells. In this letter, we demonstrate experimentally that the photocurrent density of hydrogenated amorphous silicon-germanium alloy (a-SiGe:H) based solar cells are enhanced by as much as 3.0Â mA/cm2 or 19.5% with medium sized (320Â nm) Ag NPs as compared to the specular BR. In addition, it is demonstrated that the optimized Ag NP BR is also effective in multi-junction solar cells. It is believed that it is the appropriated surface morphology of the Ag NPs that leads to the improved light-trapping. It is found that the average haze of the Ag NP enhanced BR can be improved to as much as >70% throughout the wavelength range 600-900Â nm. The atomic-force-microscopy measurement shows that the optimized root mean square roughness of Ag NP BR is about 35.2Â nm.
Related Topics
Physical Sciences and Engineering
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Authors
Wei Zi, Xiaodong Ren, Fengwei Xiao, Haoshi Wang, Fei Gao, Shengzhong (Frank) Liu,