发光二极管中负电容的测试及判定  

Measurement and Judgement on Negative Capacitance in LEDs

作　　者：陈永[1] 冯列峰[1] 朱传云[1] 王存达[1] 

机构地区：[1]天津大学应用物理学系,天津300072

出　　处：《河北工业大学学报》2005年第4期24-27,共4页Journal of Hebei University of Technology

基　　金：国家自然科学基金资助项目(60376027)

摘　　要：利用正向交流(a.c.)小信号方法对发光二极管(LEDs)的电容-电压特性进行了研究,观察到了发光二极管中的负电容现象,并且测试频率越低、正向偏压越高,负电容现象越明显,给出了证实负电容确实存在的判定性试验.An experimental study on the capacitance-voltage characteristic of LEDs was presented by using alternating current （a,c） small-signal method. Negative capacitance phenomenon was observed experimentally, and the negative capacitance phenomenon is more obvious with higher voltage or lower frequency. The existence of the negative capacitance was testified by a judgement experiment.

关 键 词：发光二极管 负电容 正向交流(a.c.) 正向偏压 测试频率 电容-电压特性 定性试验 小信号 正向 

分 类 号：TN312.8[电子电信—物理电子学] V4[航空宇航科学技术]