在脉冲系统中对SiC PiN二极管当前能力进行载波寿命调制
Xingliang Xu1,2, Lin Zhang1,2, Lianghui Li1,2
1Microsystem and Terahertz Research Center, China Academy of Engineering Physics, Chengdu, China.
Discover nano
|October 16, 2023
概括
载体寿命调制显著影响碳化 (SiC) PiN二极管脉冲电流能力. 在0.22μs以上的载波寿命优化抑制了热量产生,防止在高脉冲电流下二极管故障.
科学领域:
- 材料科学 材料科学 材料科学
- 半导体物理 半导体物理
- 电力电子 电力电子 电力电子
背景情况:
- 碳化 (SiC) PiN二极管是脉冲动力系统的有希望的自由轮二极管.
- 了解载体寿命效应对于优化SiC PiN二极管性能至关重要.
研究的目的:
- 研究载体寿命调制对SiC PiN二极管脉冲电流能力的影响.
- 在脉冲条件下确定载体寿命,热量产生和二极管故障之间的关系.
主要方法:
- 在4H-SiC PiN二极管中的调制载体寿命使用中子辐射产生Z1/2中心.
- 测试了脉冲电流能力,并测量了状态电阻.
- 进行模拟来分析二极管内的热量产生和温度升高.
主要成果:
- 脉冲电流能力在0.221.3μs之间的载体寿命中显示出有限的改善.
- 随着载体寿命从0.030.22μs增加,发生了显著的脉冲电流增强.
- 热量产生,特别是漂移层,在载体寿命<0.1μs时加剧,但在寿命≥0.2μs时被抑制.
结论:
- SiC PiN二极管的脉冲电流能力主要受到热量生成的限制,而不仅仅是状态电阻.
- 载体寿命控制导电性调制,影响热量产生和温度升高,最终影响高脉冲电流下的二极管故障.
- 优化0.2μs以上的载波寿命对于提高脉冲电流能力和防止SiC PiN二极管故障至关重要.
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