Preparation of M_(2)B_(5)O_(9)Cl:Eu^(2+)(M=Sr,Ca)blue phosphors by a facile low-temperature self-reduction method and their enhanced luminescent properties  

作　　者：Pan Liang Lianqing Li Tong Shen Wenli Lian Zhihong Liu 

机构地区：[1]Key Laboratory for Macromolecular Science of Shaanxi Province,School of Chemistry and Chemical Engineering,Shaanxi Normal University,Xi'an 710062,China [2]School of Chemistry&Chemical Engineering,Shaanxi Xueqian Normal University,Xi'an 710100,China

出　　处：《Journal of Rare Earths》2023年第3期349-357,I0001,共10页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(22003035,22073061);the Natural Science Foundation of Shaanxi Province Department of Education(21JK0587);the Natural Science Foundation of Shaanxi Province(2020GY-237);the Foundation of Shaanxi Xueqian Normal University(2020YBKJ70);Innovation and Entrepreneurship Training Program for College Students in Shaanxi Province(S202014390037)。

摘　　要：In this work,through a facile method of low-temperature(only 350℃)self-reduction,1D nano-sized M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)blue phosphors with highly efficient performance can be obtained.The crystal structure,morphology and photoluminescence(PL)properties including thermal stability of M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)phosphors were investigated.The M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)phosphors show broad band excitation spectra and narrow band emission spectra.The photoluminescence quantum yields(PLQY)of M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)are as high as 98%and 87.2%,respectively.Furthermore,the color purities of M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)can reach 99.1%and 93.2%,respectively,When heated up to 150℃,the emission intensities of M_(2)B_(5)O_(9)CI:Eu^(2+)(M=Sr,Ca)phosphors can still keep 72.7%and80.0%,respectively.Finally,the above-mentioned phosphors exhibit outstanding performance when manufacturing WLEDs.

关 键 词：Low-temperature self-reduction Borate phosphor Ultra-high quantum yield High color purity Rare earths 

分 类 号：TQ422[化学工程] TN312.8[电子电信—物理电子学]