Structural and optical properties of Dy^(3+):YAlO3 phosphors for yellow light-emitting diode applications  

作　　者：Yingshu Lian Yan Wang Jianfu Li Zhaojie Zhu Zhenyu You Chaoyang Tu Yadong Xu Wanqi Jie 

机构地区：[1]Key Laboratory of Optoelectronic Materials Chemistry and Physics,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China [2]College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China [3]Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China,Fuzhou 350108,China [4]State Key Laboratory of Solidification Processing,Northwestern Poly technical University,Xi'an 710072,China

出　　处：《Journal of Rare Earths》2021年第8期889-896,共8页稀土学报（英文版）

基　　金：Projects supported by the National Natural Science Foundation of China(51872286,51832007,51472240,61675204);Science and Technology Plan Leading Project of Fujian Province(2018H0046);State Key Laboratory of Rare Earth Resource Utilization(RERU2018004,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences);the National Key Research and Development Program of China(2016YFB0701002);the fund of the State Key Laboratory of Solidification Processing(SKLSP201908,Northwestern Polytechnical University);Natural Science Foundation of Jiangxi Province(20181BAB211009)。

摘　　要：The spectroscopic properties of a series of Dy^(3+)single-doped and Dy^(3+)/Nd^(3+),Dy^(3+)/Tb^(3+),and Dy^(3+)/Tm^(3+)co-doped YAlO_(3)(yttrium aluminum perovskite,YAP)phosphors were investigated and compared through the measurements of optical absorption,emission spectra,and fluorescence decay curves.For the Dy^(3+)ion single-doped samples,the intensity of each absorption band increases with an increment in Dy^(3+)ion doping concentration,and the identified strong absorption peak at 447 nm indicates that Dy^(3+):YAP phosphors are suitable to be pumped by a blue laser diode(LD).For all co-doped samples,absorption peaks of Dy^(3+)ion along with some of the absorption bands of Nd^(3+),Tb^(3+),and Tm^(3+)ions are observed.Under 351 and 447 nm excitation,a prominent emission peak at 572 nm was obtained in all the samples,corresponding to Dy^(3+):^(4)F_(9/2)→^(6)H_(13/2)transition.Here,2 at%Dy^(3+):YAP phosphor exhibits the highest yellow emission intensity under 447 nm pumping.Among the three kinds of Dy^(3+)co-doped phosphors,Dy^(3+)/Tb^(3+):YAP phosphor possesses the dominant yellow emission.The fluorescence decay curves show exponential behaviour and are fitted well.The Commission International de L’Eclairage(CIE)chromaticity coordinates were calculated following the respective emission spectra,and it is found that all the coordinates locate in the yellow region.The energy transfer(ET)processes were investigated and the concentration quenching mechanism was discussed.The obtained results suggest that Dy^(3+)-activated YAP phosphors are good candidates for yellow LED applications.

关 键 词：Dy^(3+):YAP phosphors Optical properties Decay lifetime CIE Energy transfer process Rare earths 

分 类 号：TN312.8[电子电信—物理电子学] TQ422[化学工程]