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
收藏
页码：447 / 449
页数：3
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