倍增层厚度对In0.53Ga0.47As/InP雪崩二极管器件特性的影响

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利用Zn扩散方法制备了倍增层厚度为1.5,1.0,0.8 μm的In0.53Ga0.47As/InP雪崩光电二极管(APDs),研究了该器件特性。随着倍增层厚度的增加,器件的贯穿电压和击穿电压均呈现增大趋势。基于Silvaco模拟计算了APD器件的倍增层厚度对电场强度、电流特性、击穿电压与贯穿电压的影响规律,结果表明,随着倍增层厚度的增加,倍增层内电场强度减小,贯穿电压和击穿电压同时增大,与实验结果吻合。进一步研究发现,当倍增层的厚度小于0.8 μm时,击穿电压随着倍增层厚度的增加会先减小后增大,贯穿电压则会单调增大。

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