標題: Efficiency improvement of Si solar cells using metal-enhanced nanophosphor fluorescence
作者: Chen, J. -Y.
Huang, C. K.
Hung, W. B.
Sun, K. W.
Chen, T. M.
應用化學系
Department of Applied Chemistry
關鍵字: Nanophosphor;Luminescence down-shifting;Metal-enhanced fluorescence;Ag nanoparticle
公開日期: 1-一月-2014
摘要: In this study, Eu2+-doped barium silicate (Ba2SiO4:Eu2+) nanophosphors dispersed in a surfactant solution were spin-coated on commercially available silicon solar cells to form colloidal crystals on the surface. The crystals then act as luminescence down-shifting centers to generate low-energy photons for incident ultraviolet light. The fluorescence from the Ba2SiO4:Eu2+ nanophosphors was further enhanced by coating a metal-enhanced layer composed of Ag nanoparticles and a SiO2 spacer. The solar cells showed an enhancement of 0.86 mA/cm(2) in short-circuit current density and approximately 0.64% increase in power conversion efficiency when coated with nanophosphors, SiO2 spacers, and Ag nanoparticles. The properties of cells integrated with the metal-enhanced layer were characterized to identify the roles of nanophosphors and Ag nanoparticles in improved light harvesting. These experiments demonstrated that the colloids of Ba2SiO4:Eu2+ acted as luminescence down-shifting centers in the ultraviolet region and the metallic nanoparticles also helped to enhance fluorescence in the visible region to increase light absorption within the measured spectral regime. (C) 2013 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.solmat.2013.08.039
http://hdl.handle.net/11536/23641
ISSN: 0927-0248
DOI: 10.1016/j.solmat.2013.08.039
期刊: SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume: 120
Issue: 
起始頁: 168
結束頁: 174
顯示於類別:期刊論文


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