REMARKABLE IMPROVEMENT IN EMISSION EFFICIENCY OF ZNCDSE/ZN(S)SE LEDS BY THERMAL ANNEALING

被引:6
作者
ICHIMURA, Y
KISHINO, K
KURAMOTO, M
SATAKE, M
YOSHIDA, A
机构
[1] Department of Electrical and Electronics Engineering, Sophia University, Tokyo, 102, 7-1 Kioi-cho, Chiyoda-ku
关键词
LIGHT EMITTING DIODE (LED); MGZNSSE; THERMAL ANNEALING; ZNCDSE/ZN(S)SE;
D O I
10.1007/BF02659891
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Thermal annealing effects on optical and electrical characteristics for p-type and n-type II-VI compound layers (ZnSe, ZnSSe, and MgZnSSe) and on the emission efficiency of ZnCdSe/Zn(S)Se 6 quantum well (QW) light emitting diodes (LEDs) grown by molecular beam epitaxy were investigated. It was clarified that serious degradation of optical and electrical characteristics was not observed up to an annealing temperature of 400 degrees C. In the case of p-MgZnSSe, the maximum permitted annealing temperature was lower than that of Zn(S)Se. The light output of the ZnCdSe/Zn(S)Se multi QW LEDs was enhanced by a factor of three at optimum thermal annealing conditions. The study suggests that this thermal effect for LEDs was produced by the improved crystal quality of ZnCdSe QWs by thermal annealing.
引用
收藏
页码:171 / 176
页数:6
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