￣(151)Eu-MOSSBAUER SPECTRA AND XPS INVESTIGATION OF BaFBr:Eu PHOSPHOR  

BaFBr∶Eu发光材料的^（151）Eu穆斯堡尔谱及X射线光电子能谱研究

作　　者：陈伟[1] 宋家庆[1] 苏勉曾[1] 

机构地区：[1]北京科技大学材料物理系,中国科学院半导体研究所,北京大学化学系

出　　处：《International Journal of Minerals,Metallurgy and Materials》1995年第2期103+97-103,共8页矿物冶金与材料学报（英文版）

摘　　要：Eu Mossbauer spectra of BaFBr:Eu phosphor are reported for the first time.The results show that f(Eu(2+) )<f(Eu(3+)) or <x2>Eu(2+)><x2>Eu(3+),which indicates that the attraction between phonons and Eu(2+) is stronger than that between phonons and Eu(3+),this may cause a faster increase of f(Eu=(2+)vs f(Eu(3+)) when temperature decreases as observed in the experiments.It is also found from Mossbauer investigation that when temperature decreases,the relative content of Eu(2+) decreases, while that of Eu(3+) increases.The temperature dependent Mossbauer spectra provide evidence for electron exchange or hopping between Eu(2+) or Eu(3+) sites in BaFBr lattice. The Mossbauer results are discussed and compared with the results of XPS and Photoluminescence studies.Eu Mossbauer spectra of BaFBr:Eu phosphor are reported for the first time.The results show that f(Eu(2+) )<f(Eu(3+)) or <x2>Eu(2+)><x2>Eu(3+),which indicates that the attraction between phonons and Eu(2+) is stronger than that between phonons and Eu(3+),this may cause a faster increase of f(Eu=(2+)vs f(Eu(3+)) when temperature decreases as observed in the experiments.It is also found from Mossbauer investigation that when temperature decreases,the relative content of Eu(2+) decreases, while that of Eu(3+) increases.The temperature dependent Mossbauer spectra provide evidence for electron exchange or hopping between Eu(2+) or Eu(3+) sites in BaFBr lattice. The Mossbauer results are discussed and compared with the results of XPS and Photoluminescence studies.

关 键 词：BaFBr:Eu phosphor Mossbauer spectra emission spectra X-ray photoelectron spectra 

分 类 号：TB34[一般工业技术—材料科学与工程]