Organic phototransistor by adopting photo-responsive polymer in hybrid gate-insulator configuration

Hea Lim Park, Min Hoi Kim, Hyeok Kim

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


In this study, we developed polymer gate insulator-based organic phototransistors (p-OPTs) with improved optical switching properties by using a hybrid gate insulator configuration. The hybrid gate insulator of our p-OPT has a photoresponsive layer made of poly(4-vinylphenol) (PVP), which enhances the photoresponse, and an interfacial layer of poly(methyl methacrylate) for reliable optical switching of the device. Our hybrid gate insulator-equipped p-OPT exhibits well-defined optical switching characteristics because no specific type of charge is significantly trapped at an interfacial layer/organic semiconductor (OSC) interface. Moreover, our device is more photoresponsive than the conventional p-OPT (here, an OPT with a single-polymer poly(methyl methacrylate) (PMMA) gate insulator), because the characteristic ultraviolet (UV) absorption of the PVP polymer allows the photoresponsive layer and OSC to contribute to the generation of charge carriers when exposed to UV light.

Original languageEnglish
Article number527
Issue number3
StatePublished - 1 Mar 2020


  • Hybrid gate insulator
  • Optical switching device
  • Organic phototransistor
  • Photoresponsive polymer
  • Poly(4-vinylphenol)
  • Poly(methyl methacrylate)
  • Polymer gate insulator


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