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激光二极管是采用化合物材料制作成的多量子阱结构的器件,其具有成本低、功耗低、发光均匀以及稳定性高的优势,在正向偏压下可产生蓝、红、绿等光,是一种应用价值较高的光电子器件。对激光二极管的正向电特性进行研究,能够掌握内部物理机制,增强激光二极管的性能。为增强激光二极管的性能,采用表征方法对发光二极管的电学特性实施精确检测。采用正向交流小信号C-V融合直流I-V特性的方法,获取激光二极管的电参数。结果表明,不同颜色的激光二极管在低频率以及高电压时产生显著的负电容,同电压间呈现指数关系;不同频率下的表观电导,在高电压下随着电压的增大而呈现指数提升,在低电压和高频率时对表观电导造成微弱干扰。
The laser diode is a multi-quantum well device made of a compound material. The laser diode has the advantages of low cost, low power consumption, uniform light emission and high stability, and can generate light of blue, red and green under forward bias, Is a high value of optoelectronic devices. Studying the forward electrical characteristics of laser diodes can grasp the internal physical mechanism and enhance the performance of laser diodes. In order to enhance the performance of the laser diode, a characterization method is used to accurately detect the electrical characteristics of the LED. The method of forward AC small signal C-V fusion DC I-V is used to obtain the electrical parameters of the laser diode. The results show that different color laser diodes have significant negative capacitance at low frequency and high voltage with an exponential relationship with voltage. Apparent conductance at different frequencies shows an exponential increase with increasing voltage at high voltage , Causing low disturbance to apparent conductance at low voltage and high frequency.