The study of Preparation and Photoluminescence on ZnS：Sm Phosphors

• Main Authors: Chen Yi-Ru, 陳奕如
• Other Authors: Tang Tzu-Piao
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/68425551889812751163

碩士 === 國立臺北科技大學 === 材料及資源工程系碩士班 === 89 === abstract The study of Luminescence to Flux in Zinc Sulfide Doping Sm Red Phosphors, and Flux are four kinds compound of LiCl、KF、LiCl + LiF、and KF + LiF. When Li+ added to ZnS：Sm that is easy into ZnS crystal lattice space in reduced-firing for Li+ radius is small size, electron can transmit speed up, and that form ZnS：Sm luminescence of luminescent mechanism, we can detect red Sm characteristic spectrum to increase and eliminate from host lattice luminescence. When Cl—added to ZnS：Sm, Cl—and Sm3+ together causes a reaction, it lead to form Sm-VZn-Cl—, The Cl— radius is big size that can easy reaction with Sm3+ form Sm compound, that can control effective, host lattice luminescence in PL spectrum. When K+ and F— add to ZnS：Sm, that F— can be react with Sm3+ to form SmF3 compound, Cl— easy reaction with Sm3+ than F—. The K+ surround particle of ZnS and make ZnS of particle grow up. The main of ZnS for hexagonal phase that helps better Sm3+ excitation absorption. When Sm3+ into ZnS is lower concentration is Sm2O2S phase of luminescent mechanism, high concentration Sm3+ have Sm2O3(Hex) and Sm2O2S phase, sample can be found red characteristic spectrum and spectrum shades of color nice better. And all different kinds of flux of PL spectrum take 653nm wavelength can find flux better conditions and intensity order. ZnS：Sm added LiCl flux has better luminescence for 0.30mol%Sm, 4.00mol%LiCl. ZnS：Sm added KF flux has better luminescence for 0.20mol%Sm, 0.60mol%KF. ZnS：Sm added LiCl and LiF flux has better luminescence for 0.30mol%Sm, 0.90mol% LiCl and LiF. ZnS：Sm added KF and LiF flux has better luminescence for 0.30mol%Sm, 0.90mol% KF and LiF. All flux of luminescence occur ways are 4G5/2===>6H9/2(653nm),4G5/2===>6H7/2(606nm), 4G5/2 ===>6H5/2 (570nm) can get there wavelength in red spectrum region.