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  • Mechanism of Threshold Voltage Shift inp-GaN Gate AlGaN/GaN Transistors

    Author(s)
    Tang, Xi
    Li, Baikui
    Moghadam, Hamid Amini
    Tanner, Philip
    Han, Jisheng
    Dimitrijev, Sima
    Griffith University Author(s)
    Dimitrijev, Sima
    Tanner, Philip G.
    Amini Moghadam, Hamid
    Year published
    2018
    Metadata
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    Abstract
    In this letter, we investigate the threshold voltage (V TH ) shift in a p-GaN gate AIGaN/GaN transistor by designed gate-bias pulse measurements. It was found that the forward gate bias causes positive (V TH ) shift. The dynamics of electron trapping was revealed from the dependences of the consequent (V TH ) shift on the bias duration at different voltages. A time constant smaller than 0.1 ms for the (V TH ) shift saturation at 6-V gate bias was obtained. It was also found that the (V TH ) became inversely proportional to the gate-bias voltages exceeding 7 V. This inverse proportionality of the (V TH ) shift resulted from ...
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    In this letter, we investigate the threshold voltage (V TH ) shift in a p-GaN gate AIGaN/GaN transistor by designed gate-bias pulse measurements. It was found that the forward gate bias causes positive (V TH ) shift. The dynamics of electron trapping was revealed from the dependences of the consequent (V TH ) shift on the bias duration at different voltages. A time constant smaller than 0.1 ms for the (V TH ) shift saturation at 6-V gate bias was obtained. It was also found that the (V TH ) became inversely proportional to the gate-bias voltages exceeding 7 V. This inverse proportionality of the (V TH ) shift resulted from the threshold of the hole-injection/electroluminescence (EL) and the sequential optical pumping effect on the electron traps. The EL emission was confirmed by a self- and in-situ photon detection measurement.
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    Journal Title
    IEEE Electron Device Letters
    Volume
    39
    Issue
    8
    DOI
    https://doi.org/10.1109/LED.2018.2847669
    Subject
    Electrical engineering
    Electronics, sensors and digital hardware
    Electronics, sensors and digital hardware not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/381766
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    • Journal articles

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