文献类型：期刊文献

英文题名：Enhanced quantum efficiency and thermal stability in tunable yellow - emitting Sr x Ca 1-x AlSiN 3:Ce 3+phosphor

作者：Si, Jiayong[1,2];Liu, Lihong[2];Liang, Qifeng[3];Yi, Wei[4];Cai, Gemei[5];Zhang, Jing[6];Takeda, Takashi[2];Hirosaki, Naoto[2];Xie, Rong-Jun[7]

机构：[1]Cent South Univ Forestry & Technol, Coll Mech & Elect Engn, Changsha 410004, Hunan, Peoples R China;[2]Natl Inst Mat Sci, Sialon Grp, Namiki1-1, Tsukuba, Ibaraki 3050044, Japan;[3]Shaoxing Univ, Dept Phys, Shaoxin 312000, Zhejiang, Peoples R China;[4]MANA, Nano Elect Device Mat Grp, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan;[5]Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China;[6]Southwest Petr Univ, Sch Mat Sci & Engn, Chengdu 610500, Sichuan, Peoples R China;[7]Xiamen Univ, Coll Mat, Xiamen 361005, Fujian, Peoples R China

年份：2020

卷号：831

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：SCI-EXPANDED(收录号：WOS:000531725900014)、、EI(收录号：20201208320955)、Scopus(收录号：2-s2.0-85081749604)、WOS

基金：We are grateful to the National Key Research and Development Program (MOST, 2017YFB0404301), and the National Nature Science Foundation of China (Nos. 51832005, 51561135015, 51502020, 11574215 and 51772330). The calculations in this work were performed on the supercomputers of Shanghai supercomputer center and of the high performance computing center of Nanjing University.

语种：英文

外文关键词：Aluminum compounds - Blue shift - Calcium compounds - Cerium compounds - Efficiency - Electronic structure - Light emission - Lighting - Phosphors - Professional aspects - Quantum efficiency - Silicon - Silicon compounds - Thermodynamic stability - Tuning

外文摘要：Ce3+ doped CaAlSiN3 is a promising broadband orange phosphor that can be applied in white light-emitting diodes (wLEDs) solid state lighting for general illumination. However, its emission color and quantum efficiency are not good enough to achieve high color rendering properties and luminous efficacy of wLEDs. In this work, we proposed to realize the spectral tuning and property enhancement of CaAlSiN3:Ce3+ by bandgap engineering via the cationic substitution of Ca by Sr. The relationship between photoluminescence and local coordination structure as well as electronic structure were revealed. The substitution led to a blue-shift in emission maximum by 13 nm (from 595 to 582 nm) and a highest external quantum efficiency of 55% (enhanced by 10%). This broadband yellow phosphor enabled to produce wLEDs with a color rendering index of 83.3, luminous efficacy of 114.6 l m/W and a color temperature of 4604 K. ? 2020 Elsevier B.V.