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Sr/Ca比变化对红色荧光粉Ca_1-xSr_xS:Eu²⁺的影响

Influence of Sr/Ca Ratio on Red Phosphor Ca_1-xSr_xS∶Eu²⁺

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【Author】 Hu Yunsheng~(1, 2), Ye Hongqi~1, Zhuang Weidong~(2*), Zhang Shusheng~2, He Huaqiang~2, Huang (Xiaowei~2) (1. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; 2. National Engineering Research Center for Rare Earth Materials, General (Research) Institute for Nonferrous Metals, Grirem Advanced Materials Co. Ltd., Beijing 100088, China)

【机构】中南大学化学化工学院；北京有色金属研究总院稀土材料国家工程研究中心有研稀土新材料股份有限公司；北京有色金属研究总院稀土材料国家工程研究中心有研稀土新材料股份有限公司湖南长沙410083北京有色金属研究总院稀土材料国家工程研究中心有研稀土新材料股份有限公司北京100088；湖南长沙410083；北京100088；北京100088；

【摘要】在CO气氛下采用固相反应法合成了发红光的Ca1-xSrxS∶Eu2+荧光粉,研究了基质阳离子Sr/Ca比变化对其晶体性质及发光性能的影响。结果表明,随着Sr/Ca比的减少,荧光粉的晶胞参数逐渐降低;同时,由于受电子云膨胀效应和晶体场影响,发射主峰向长波方向移动,红色比逐渐增大,色纯度提高。更多还原

【Abstract】 The red phosphor Ca_1-xSr_xS∶Eu²⁺ was prepared by solid-state reaction in CO atmosphere. The influence of Sr/Ca ratio on the phosphor was investigated. The results show that Sr/Ca ratio not only affects the lattice parameters of the phosphor, but also influences the emission peak. With the increase of concentration of Ca²⁺, the lattice parameters decrease gradually, and the emission peaks of the phosphor move to the longer wavelength and the red ratio runs to bigness then the color purity is improved due to electron cloud expansion and crystal field change.更多还原