Blue Photoluminescence and Resonant Raman Scattering in Bulk CuAlSe2 Grown by THM

被引：3

作者：

Shim, Yonggu ^{[1
]}

Kimura, Hiroaki ^{[1
]}

Horikawa, Syuichi ^{[1
]}

Yamamoto, Nobuyuki ^{[1
]}

机构：

[1] Osaka Prefecture Univ, Coll Engn, Dept Phys & Elect, Sakai, Osaka 5998531, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2000年 / 39卷 / 01期

关键词：

CuAlSe2; THM growth; blue photoluminescence; resonant Raman scattering;

D O I：

10.7567/JJAPS.39S1.447

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Blue band edge photoluminescence is observed for the first time in CuASe(2) single crystals grown by THM from the 5 % Cu2Se-rich polycrystalline raw materials. Exciting light energy dependence of the photo-luminescence and resonant Raman scattering exhibits a strong enhancement at 2.601 eV, close to the energy of a bound exciton. A model of the radiative recombination responsible for the newly observed emissions is proposed with a deep donor and a deep acceptor with unclarified origin yet. The value of a small band gap reduction, estimated from the energy shift in the luminescence spectrum, is found to be consistent with that of the In-alloying effect on band gap in the THM-grown CuAlSe2.

引用

页码：447 / 449

页数：3

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