个人信息
教师姓名：尹良君
教师拼音名称：yinliangjun
电子邮箱：ljyin@uestc.edu.cn
所在单位：电子科学与工程学院
学历：博士研究生毕业
办公地点：国家电磁辐射控制材料工程技术研究中心 C318B
性别：男
学位：工学博士学位
职称：教授
在职信息：在职人员
毕业院校：中国科技大学
硕士生导师
曾获荣誉：省部级人才计划
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所属院系： 电子科学与工程学院（示范性微电子学院）
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学科：电子信息材料与元器件
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论文成果
Achieving an efficient La<sub>3</sub>Si<sub>8</sub>N<sub>11</sub>O<sub>4</sub>: Eu<SUP>2+</SUP> phosphor via chemical reduction of nano-scale carbon film: Toward white light-emitting diodes
发布时间：2025-05-23 点击次数：
所属单位：[1]Univ Elect Sci & Technol China, Sch Mat & Energy, Chengdu, Sichuan, Peoples R China;[2]Chengdu Univ Technol, Coll Mat & Chem & Chem Engn, Chengdu, Sichuan, Peoples R China;[3]Chengdu Fine Opt Engn Res Ctr, Chengdu, Sichuan, Peoples R China;[4]Dongfang Elect Corp, Lab Energy Storage & New Energy Mat Technol, Cent Res Inst, Chengdu, Sichuan, Peoples R China;[5]Xiamen Univ, Coll Mat, Xiamen, Fujian, Peoples R China;[6]Univ Elect Sci & Technol China, Natl Engn Res Ctr Electromagnet Radiat Control Ma, Chengdu, Sichuan, Peoples R China;[7]Univ Sci & Technol China, Dept Mat Sci & Engn, Lab Mat Energy Convers, Hefei, Anhui, Peoples R China;[8]Phenikaa Univ, Phenikaa Inst Adv Study, Hanoi 10000, Vietnam;[9]A&A Green Phoenix Grp, PRATI, 167 Hoang Ngan, Hanoi 10000, Vietnam
发表刊物：JOURNAL OF ALLOYS AND COMPOUNDS
关键字：Photoluminescence; La3Si8N11O4:Eu phosphors; Carbon coating; Lattice parameters; White light-emitting diodes
摘要：In this work, Eu-doped La3Si8N11O4 phosphors with different doping concentrations are fabricated by solid state reaction method. A broad and asymmetric emission band that covers the wavelength range of 425-550 nm is observed. X-ray diffraction Rietveld refinement and X-ray absorption near edge structure (XANES) analyses reveal the co-existence of both trivalent and divalent states of Eu. By coating the phosphor particles with an ultrathin carbon layer using CVD technique, followed by an annealing in N-2 at 1600 degrees C, the trivalent ions Eu3+ are reduced to Eu2+, resulting in a significant enhancement of quantum efficiency, both internal and external, and absorption efficiency. The application of the La3Si8N11O4:Eu in white light-emitting diodes is tested by coating the phosphor onto a near-UV LED chip in combination with the red-, green- and blue-emitting phosphors ([Ca, Sr]AlSiN3:Eu, (R)-Sialon:Eu and BaMgAl10O17:Eu, respectively). It is demonstrated that the presence of the La3Si8N11O4:Eu phosphor significantly enhances the color rendering index of the device, showing its great potential for wLEDs applications. (C) 2019 Elsevier B.V. All rights reserved.
文献类型：Article
卷号：799
页面范围：360-367
ISSN号：0925-8388
是否译文：否
