OPTICAL-ABSORPTION AND ELECTRON-SPIN-RESONANCE IN CUALS2NI

被引：2
|
作者：
AKSENOV, I
KAI, T
NISHIKAWA, N
SATO, K
机构：
[1] Tokyo University of Agriculture and Technology, Koganei, Tokyo
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1993年 / 32卷 / 08期
关键词：
CUALS2 TERNARY SEMICONDUCTOR; NI TRANSITION ATOM IMPURITY; OPTICAL ABSORPTION SPECTRUM; ESR SPECTRUM; PHOTOIONIZATION TRANSITION; FERMI LEVEL;
D O I：
10.1143/JJAP.32.3391
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Electron spin resonance (ESR) and optical absorption spectra have been studied in Ni-doped CuAlS2 crystals, grown by the chemical vapour transport technique. Absorption spectra show optical transitions between 3d-shell originated orbitals of the Ni2+ ion, as well as charge-transfer transitions Ni3+-->Ni2+ and Ni2+-->Ni+, their intensities being dependent on the position of the Fermi level in the bandgap of the host compound. The ESR results confirm the changes in the relative concentrations of Ni in different charged states caused by the Fermi level shift in the band gap, this shift, in its turn, being caused by thermal treatments of the crystals in various atmospheres.
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页码：3391 / 3395
页数：5
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