Efficiency improvement of Si solar cells using metal-enhanced nanophosphor fluorescence

J. Y. Chen, C. K. Huang, W. B. Hung, Kien-Wen Sun*, Teng-Ming Chen


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49 引文 斯高帕斯(Scopus)


In this study, Eu2+-doped barium silicate (Ba 2SiO4: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 Ba2SiO 4: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/cm2 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.

頁(從 - 到)168-174
期刊Solar Energy Materials and Solar Cells
出版狀態Published - 1 1月 2014


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