Photogating and electrical-gating of amorphous GaSnZnO-based inverter with light-transmitting gate electrode

Hee Sung Lee, Kwang H. Lee, Youn Gyoung Chang, Syed Raza Ali Raza, Seongil Im, Dong Ho Kim, Hye Ri Kim, Gun Hwan Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Photoinverter and electrical-inverter applications of amorphous GaSnZnO thin-film transistors (GTZO-TFTs) with Al2 O3 dielectrics were studied. The inverters were composed of two serially connected top-gate GTZO-TFTs with different gate electrodes: semitransparent conducting NiO x and opaque Al. Since the two electrodes have so different work functions as to properly arrange the respective threshold voltages of driver and load TFTs, our inverter exhibited a desirable voltage transfer characteristics with voltage gain of over 25 for electrical gating. A dynamic photogating was demonstrated with an output photogain of ∼2 V as we applied a blue illumination onto semitransparent NiOx gate, through which the photons are transmitted to excite the trapped electrons at the Al2 O3 dielectric/GTZO channel interface.

Original languageEnglish
Article number223505
JournalApplied Physics Letters
Volume98
Issue number22
DOIs
Publication statusPublished - 2011 May 30

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electrodes
inverters
electric potential
threshold voltage
transistors
illumination
conduction
output
photons
thin films
electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Lee, Hee Sung ; Lee, Kwang H. ; Chang, Youn Gyoung ; Raza, Syed Raza Ali ; Im, Seongil ; Kim, Dong Ho ; Kim, Hye Ri ; Lee, Gun Hwan. / Photogating and electrical-gating of amorphous GaSnZnO-based inverter with light-transmitting gate electrode. In: Applied Physics Letters. 2011 ; Vol. 98, No. 22.
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Photogating and electrical-gating of amorphous GaSnZnO-based inverter with light-transmitting gate electrode. / Lee, Hee Sung; Lee, Kwang H.; Chang, Youn Gyoung; Raza, Syed Raza Ali; Im, Seongil; Kim, Dong Ho; Kim, Hye Ri; Lee, Gun Hwan.

In: Applied Physics Letters, Vol. 98, No. 22, 223505, 30.05.2011.

Research output: Contribution to journalArticle

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