PHOTOINDUCED TRANSFERRED CHARGE IN RARE-EARTH-DOPED ALKALINE-EARTH SULFIDE ELECTROLUMINESCENT THIN-FILMS

被引：15

作者：

TANAKA, S

YOSHIYAMA, H

NAKAMURA, K

WADA, S

MORITA, H

KOBAYASHI, H

机构：

[1] Department of Electrical and Electronic Engineering, Tottori University, Koyama Tottori

[2] Kobe Steel Ltd, Kobe Hyogo

[3] Matsushita Electric Industrial Co. Ltd, Audio Video Research Lab, Moriguchi Osaka

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1991年 / 30卷 / 6A期

关键词：

CAS-EU; SRS-CE; K; THIN-FILM EL; PHOTOINDUCED TRANSFERRED CHARGE; EL EXCITATION MECHANISM;

D O I：

10.1143/JJAP.30.L1021

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The spectral response of the photo-induced transferred charge in Eu2+- or Ce3+-doped CaS and SrS thin-film electroluminescent (EL) devices has been studied. It is found that excitation spectra of the photo-induced transferred charge agree with those of photoluminescence. This result implies that the Eu2+ or Ce3+ luminescent centers are ionized by electric field when the centers are excited to the (4f)n-1(5d) excited state. The dynamics of the EL emission are controlled by field-dependent ionization of the luminescent centers and by field-dependent trapping at the ionized centers, rather than by impact excitation of the luminescent centers.

引用

页码：L1021 / L1024

页数：4

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