Colour control in SrS:Cu,Cl powder phosphor

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• 作者：E.I.  ; Anila^a ;   ; ^b ; I.P.  ; Sanjaykumar^b ; M.K.  ; Jayaraj^b ;   ; ^{mkj@cusat.ac.in} ;   ; ^{anilaei@gmail.com}
• 关键词：X-ray diffraction ; Lattice parameter ; Photoluminescence ; Diffuse reflectance
• 刊名：Materials Science and Engineering: A
• 出版年：2011
• 出版时间：15 December 2011
• 年：2011
• 卷：530
• 期：Complete
• 页码：624-627
• 全文大小：375 K

文摘

By controlling the concentration of defects and their type in strontium sulphide phosphor, a broad range of colours in the visible spectrum can be achieved. Photoluminescence (PL) spectrum in the blue to green range of SrS:Cu,Cl is presented and explained on the basis of charge compensation process and coordination about the Cu⁺ ion. Analysis of lattice parameter, strain and grain size were carried out on the basis of X-ray diffraction (XRD) data. From the study of diffuse reflectance spectra (DRS), red-shift in band-gap was observed with increasing doping concentration, which is due to the presence of doping induced tail states.