Solar-blind photodetectors based on Ga2O3 and III-nitrides

Ryan McClintock; Alexander Jaud; Lakshay Gautam; Manijeh Razeghi

doi:10.1117/12.2549606

31 January 2020 Solar-blind photodetectors based on Ga₂O₃ and III-nitrides

Ryan McClintock, Alexander Jaud, Lakshay Gautam, Manijeh Razeghi

Proceedings Volume 11288, Quantum Sensing and Nano Electronics and Photonics XVII; 1128803 (2020) https://doi.org/10.1117/12.2549606
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

Recently, there has been a surge of interest in the wide bandgap semiconductors for solar blind photo detectors (SBPD). This work presents our recent progress in the growth/doping of AlGaN and Ga₂O₃ thin films for solar blind detection applications. Both of these thin films grown are grown by metal organic chemical vapor deposition (MOCVD) in the same Aixtron MOCVD system. Solar-blind metal-semiconductor-metal photodetectors were fabricated with Ga₂O₃. Spectral responsivity studies of the MSM photodetectors revealed a peak at 261 nm and a maximum EQE of 41.7% for a −2.5 V bias. We have also demonstrated AlGaN based solar-blind avalanche photodiodes with a gain in excess of 57,000 at ~100 volts of reverse bias. This gain can be attributed to avalanche multiplication of the photogenerated carriers within the device. Both of these devices show the potential of wide bandgap semiconductors for solar blind photo detectors.

Conference Presentation

Citation Download Citation

Ryan McClintock, Alexander Jaud, Lakshay Gautam, and Manijeh Razeghi "Solar-blind photodetectors based on Ga₂O₃ and III-nitrides", Proc. SPIE 11288, Quantum Sensing and Nano Electronics and Photonics XVII, 1128803 (31 January 2020); https://doi.org/10.1117/12.2549606

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