中国物理B ›› 2017, Vol. 26 ›› Issue (10): 108505-108505.doi: 10.1088/1674-1056/26/10/108505
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
Xi Wang(王曦), Hongbin Pu(蒲红斌), Qing Liu(刘青), Chunlan Chen(陈春兰), Zhiming Chen(陈治明)
Xi Wang(王曦), Hongbin Pu(蒲红斌), Qing Liu(刘青), Chunlan Chen(陈春兰), Zhiming Chen(陈治明)
摘要: To overcome hole-injection limitation of p+-n emitter junction in 4H-SiC light triggered thyristor, a novel high-voltage 4H-SiC light triggered thyristor with double-deck thin n-base structure is proposed and demonstrated by two-dimensional numerical simulations. In this new structure, the conventional thin n-base is split to double-deck. The hole-injection of p+-n emitter junction is modulated by modulating the doping concentration and thickness of upper-deck thin n-base. With double-deck thin n-base, the current gain coefficient of the top pnp transistor in 4H-SiC light triggered thyristor is enhanced. As a result, the triggering light intensity and the turn-on delay time of 4H-SiC light triggered thyristor are both reduced. The simulation results show that the proposed 10-kV 4H-SiC light triggered thyristor is able to be triggered on by 500-mW/cm2 ultraviolet light pulse. Meanwhile, the turn-on delay time of the proposed thyristor is reduced to 337 ns.
中图分类号: (Thyristors)