Luminescence of emission-tunable Na_(15.6)Ca_(3.84)Si_(12)O_(36):Ce^(3+),Tb^(3+),Na^+phosphors for near-ultraviolet light-emitting diodes  

作　　者：张佳 俞阿龙 华正和 温世正 

机构地区：[1]School of Physics and Electronic Electrical Engineering,Huaiyin Normal University,Huai'an 223001,China [2]Jiangsu Provincial Key Laboratory of Mod-ern Measurement Technology and Intelligent System,Huai'an 223001,China

出　　处：《Journal of Rare Earths》2016年第6期565-570,共6页稀土学报（英文版）

基　　金：Project supported by National Natural Science Foundation of China(21403081);Natural Science Foundation of Jiangsu Province of China(BK20140456)

摘　　要：A series of Na_（15.6）Ca_（3.84）Si_（12）O_（36）：Ce^（3＋）,Tb^（3＋）,Na~＋（NCS：Ce^（3＋）,Tb^（3＋）,Na~＋） phosphors were prepared by conventional solid-state reaction method, and their photoluminescence properties under near-ultraviolet（NUV） excitation were studied. The excitation spectrum of Ce^（3＋）-single-doped NCS showed a broad excitation band from 250 to 400 nm, which could well match with the emission wavelength of the NUV LED chip. Upon 365 nm excitation, the NCS：Ce^（3＋）,Na~＋ phosphor demonstrated a blue emission in the range of 400–600 nm with the predominated peak at 443 nm. By co-doping Tb^（3＋） into NCS：0.04Ce^（3＋）,0.04Na~＋, tunable-emission was realized due to the energy transfer from Ce^（3＋） to Tb^（3＋）, and nearly white light was also obtained. The investigation also revealed that warm white light could be further generated by combining the NCS：0.04Ce^（3＋）,y Tb^（3＋）,（0.04＋y）Na~＋ with other red-emitting phosphors. Thus, the NCS：Ce^（3＋）,Tb^（3＋）,Na~＋ phosphors could be promising candidate for white LEDs.A series of Na_（15.6）Ca_（3.84）Si_（12）O_（36）：Ce^（3＋）,Tb^（3＋）,Na~＋（NCS：Ce^（3＋）,Tb^（3＋）,Na~＋） phosphors were prepared by conventional solid-state reaction method, and their photoluminescence properties under near-ultraviolet（NUV） excitation were studied. The excitation spectrum of Ce^（3＋）-single-doped NCS showed a broad excitation band from 250 to 400 nm, which could well match with the emission wavelength of the NUV LED chip. Upon 365 nm excitation, the NCS：Ce^（3＋）,Na~＋ phosphor demonstrated a blue emission in the range of 400–600 nm with the predominated peak at 443 nm. By co-doping Tb^（3＋） into NCS：0.04Ce^（3＋）,0.04Na~＋, tunable-emission was realized due to the energy transfer from Ce^（3＋） to Tb^（3＋）, and nearly white light was also obtained. The investigation also revealed that warm white light could be further generated by combining the NCS：0.04Ce^（3＋）,y Tb^（3＋）,（0.04＋y）Na~＋ with other red-emitting phosphors. Thus, the NCS：Ce^（3＋）,Tb^（3＋）,Na~＋ phosphors could be promising candidate for white LEDs.

关 键 词：LUMINESCENCE PHOSPHOR light-emitting diodes rare earths 

分 类 号：TQ422[化学工程] TN312.8[电子电信—物理电子学]