A ZnO nanowire-based photo-inverter with pulse-induced fast recovery

Syed Raza Ali Raza, Young Tack Lee, Seyed Hossein Hosseini Shokouh, Ryong Ha, Heon-Jin Choi, Seongil Im

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We demonstrate a fast response photo-inverter comprised of one transparent gated ZnO nanowire field-effect transistor (FET) and one opaque FET respectively as the driver and load. Under ultraviolet (UV) light the transfer curve of the transparent gate FET shifts to the negative side and so does the voltage transfer curve (VTC) of the inverter. After termination of UV exposure the recovery of photo-induced current takes a long time in general. This persistent photoconductivity (PPC) is due to hole trapping on the surface of ZnO NWs. Here, we used a positive voltage short pulse after UV exposure, for the first time resolving the PPC issue in nanowire-based photo-detectors by accumulating electrons at the ZnO/dielectric interface. We found that a pulse duration as small as 200 ns was sufficient to reach a full recovery to the dark state from the UV induced state, realizing a fast UV detector with a voltage output.

Original languageEnglish
Pages (from-to)10829-10834
Number of pages6
JournalNanoscale
Volume5
Issue number22
DOIs
Publication statusPublished - 2013 Nov 21

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Nanowires
Photoconductivity
Field effect transistors
Recovery
Electric potential
Ultraviolet detectors
Gates (transistor)
Induced currents
Detectors
Electrons
Ultraviolet Rays

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Raza, S. R. A., Lee, Y. T., Hosseini Shokouh, S. H., Ha, R., Choi, H-J., & Im, S. (2013). A ZnO nanowire-based photo-inverter with pulse-induced fast recovery. Nanoscale, 5(22), 10829-10834. https://doi.org/10.1039/c3nr03801g
Raza, Syed Raza Ali ; Lee, Young Tack ; Hosseini Shokouh, Seyed Hossein ; Ha, Ryong ; Choi, Heon-Jin ; Im, Seongil. / A ZnO nanowire-based photo-inverter with pulse-induced fast recovery. In: Nanoscale. 2013 ; Vol. 5, No. 22. pp. 10829-10834.
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Raza, SRA, Lee, YT, Hosseini Shokouh, SH, Ha, R, Choi, H-J & Im, S 2013, 'A ZnO nanowire-based photo-inverter with pulse-induced fast recovery', Nanoscale, vol. 5, no. 22, pp. 10829-10834. https://doi.org/10.1039/c3nr03801g

A ZnO nanowire-based photo-inverter with pulse-induced fast recovery. / Raza, Syed Raza Ali; Lee, Young Tack; Hosseini Shokouh, Seyed Hossein; Ha, Ryong; Choi, Heon-Jin; Im, Seongil.

In: Nanoscale, Vol. 5, No. 22, 21.11.2013, p. 10829-10834.

Research output: Contribution to journalArticle

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