MECHANISM OF PHOTOSTIMULATED LUMINESCENCE PROCESS IN BAFBR-EU2+ PHOSPHORS

被引：116

作者：

IWABUCHI, Y ^{[1
]}

MORI, N ^{[1
]}

TAKAHASHI, K ^{[1
]}

MATSUDA, T ^{[1
]}

SHIONOYA, S ^{[1
]}

机构：

[1] TOKYO ENGN UNIV,DEPT ELECTR,HACHIOJI,TOKYO 192,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1994年 / 33卷 / 1A期

关键词：

LUMINESCENCE; PHOTOSTIMULATED LUMINESCENCE; PHOTOCONDUCTIVITY; PHOTOSTIMULATED PHOTOCONDUCTIVITY; MECHANISM; PHOSPHORS; BAFBR-EU2+; F-CENTER; X-RAY; IMAGING PLATE;

D O I：

10.1143/JJAP.33.178

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The formation of photostimulated luminescence (PSL) centers in BaFBr:Eu2+ single-crystal phosphors is studied in the 5-9 eV vacuum ultraviolet region. The centers are efficiently formed by the EU(2+) photoionization absorption at 6.6 eV. The PSL excitation spectrum after the photoionization excitation is almost the same as that after X-ray excitation. Photoconductivity is generated in the PSL process after the photoionization excitation. These results present further confirmation of the PSL mechanism of Takahashi et al. [J. Lumin. 31&32 (1984) 266]. The numerical analysis of the dependence of the PSL intensity on X-ray excitation intensity, assuming bimolecular kinetics in accord with this mechanism, gives the linear dependence over a very wide range of X-ray intensity under the practical conditions in the PSL applications. Thus the mechanism of Takahashi et al. is definitely established.

引用

页码：178 / 185

页数：8

共 22 条

[11] PHOTOIONIZATION AND LUMINESCENCES IN BAF2-EU2+ [J].