Suppression of persistent photoconductivity AlGaN/GaN heterostructure photodetectors using pulsed heating

Jianwen Sun, Teng Zhan, Zewen Liu, Junxi Wang, Xiaoyan Yi, Pasqualina M. Sarro, Guoqi Zhang

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This paper demonstrates a method to reduce the decay time in AlGaN/GaN photodetectors by a pulsed heating mode. A suspended AlGaN/GaN heterostructure photodetector integrated with a micro-heater is fabricated and characterized under ultraviolet illumination. We have observed that the course of persistent photoconductivity was effectively accelerated by applying pulsed heating. The decay time is significantly reduced from 175 s by DC heating to 116 s by 50 Hz pulsed heating at the same power (280 mW). With the same pulse duty cycle and a 50 Hz pulsed heating frequency, a reduction of 30%-45% in decay time is measured compared to DC heating.

Original languageEnglish
Article number122007
Pages (from-to)122007-1 - 122007-4
Number of pages4
JournalApplied Physics Express
Issue number12
Publication statusPublished - 2019

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


  • pulsed heating
  • AlGaN
  • GaN
  • UV detector


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