Au Nanoparticle Light Scattering Enhanced Responsivity in Pentacene Phototransistor for Deep-UV Light Detection

Shuo Huang Yuan, Zingway Pei*, Hsin Cheng Lai, Chien Hsun Chen, Pei-Wen Li, Yi Jen Chan

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

In this letter, a pentacene thin-film phototransistor (PTFP) with gold nanoparticles (Au-NPs) decoration in bottom-gate structure was demonstrated. With the Au-NPs, this device is capable of scattering the free-space ultra-violet (UV) irradiation into the pentacene film. Therefore, the PTFP with Au-NPs exhibit 4.5-A/W responsivity with V GS = 0 V at the wavelength of 240 nm. Meanwhile, an ultimate 32.4-A/W responsivity can be achieved with V GS = -10 V at the wavelength of 240 nm. Such an excellent spectral response suggests PTFP is capable for used in daily and disposable UV status assessment.

Original languageEnglish
Article number7270271
Pages (from-to)1186-1188
Number of pages3
JournalIEEE Electron Device Letters
Volume36
Issue number11
DOIs
StatePublished - 1 Nov 2015

Keywords

  • gold nanoparticles
  • Phototransistor
  • responsivity

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