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Chunxian Tao,Zhaoxia Han,Jun Ruan,Shunpeng Shu,Zhongrong Lu,Ruijin Hong,Dawei Zhang 한국광학회 2017 Current Optics and Photonics Vol.1 No.4
In order to investigate the ultraviolet-excited photoluminescence properties of phosphor coatings andtheir relationship to thickness, Lumogen coatings with different thicknesses were deposited on quartzsubstrates and charge-coupled device chips by thermal evaporation. The variation of the film thicknessaffected the crystallite size, surface roughness and fluorescence signal. It was found that the Lumogencoating with the thickness of 420 nm has the largest luminescent signal and conversion efficiency, andthe corresponding coated charge-coupled devices had the maximum quantum efficiency in the ultraviolet. These results provided one key parameter for improving the sensitivity of Lumogen coated charge-coupleddevices to ultraviolet light.