We analyze the responsivity and signal-to-noise ratio(SNR)of a punchthrough enhanced phototransistor(PEPT).Measurement results show that the PEPT exhibits a good response to light over a wide range of intensity.Becaus...We analyze the responsivity and signal-to-noise ratio(SNR)of a punchthrough enhanced phototransistor(PEPT).Measurement results show that the PEPT exhibits a good response to light over a wide range of intensity.Because the responsivity is still as high as 106 A/W when the bias voltage is as low as 0.2 V,the device is suitable for ultra-low voltage applications.Meanwhile,with 1–10μA bias current,the PEPT shows the best performance for the responsivity and SNR.When incident light is as low as 3.8×10^(-8) W/cm^(2),the responsivity reaches approximately 108 A/W.The super high responsivity of PEPTs makes it possible to fabricate small sized photodetector.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 61076046 and 61106003the Science and Technology Development Plan Projects of Jilin Province(No 20100501)。
文摘We analyze the responsivity and signal-to-noise ratio(SNR)of a punchthrough enhanced phototransistor(PEPT).Measurement results show that the PEPT exhibits a good response to light over a wide range of intensity.Because the responsivity is still as high as 106 A/W when the bias voltage is as low as 0.2 V,the device is suitable for ultra-low voltage applications.Meanwhile,with 1–10μA bias current,the PEPT shows the best performance for the responsivity and SNR.When incident light is as low as 3.8×10^(-8) W/cm^(2),the responsivity reaches approximately 108 A/W.The super high responsivity of PEPTs makes it possible to fabricate small sized photodetector.
