Avalanche Ruggedness of GaN p-i-n Diodes Grown on Sapphire Substrate

被引:10
|
作者
Liu, Wenkai [1 ]
Xu, Weizong [1 ]
Zhou, Dong [1 ]
Ren, Fangfang [1 ]
Chen, Dunjun [1 ]
Yu, Peng [2 ]
Zhang, Rong [1 ]
Zheng, Youdou [1 ]
Lu, Hai [1 ]
机构
[1] Nanjing Univ, Sch Elect Sci & Engn, Jiangsu Prov Key Lab Adv Photon & Elect Mat, Nanjing 210093, Jiangsu, Peoples R China
[2] State Grid Shandong Elect Power Res Inst, Jinan 250001, Shandong, Peoples R China
基金
国家重点研发计划;
关键词
avalanche ruggedness; gallium nitride; localized avalanche multiplication; p-i-n diodes; LIGHT-EMITTING-DIODES; BREAKDOWN;
D O I
10.1002/pssa.201800069
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Avalanche capability plays critical roles in safe operation of GaN-based high power devices and systems. In this study, GaN-based quasi-vertical p-i-n diodes on sapphire substrate with avalanche capability are fabricated, and for the first time, their avalanche ruggedness is investigated. Repeated avalanche breakdown tests suggest the representative features of avalanche-capability degradation, reduction in breakdown voltage, and rise in reverse leakage current. Further numerical simulations reveal the localization of avalanche breakdown, while subsequent pulsed current-voltage measurements identify that the thermal heating effect generated during localized avalanche multiplication is responsible for the device degradation in avalanche ruggedness.
引用
收藏
页数:6
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