Photocurrent and photoluminescence characteristics of networked GaN nanowires

Myungil Kang, Jong Soo Lee, Sung Kyu Sim, Hyunsuk Kim, Byungdon Min, Kyoungah Cho, Gyu-Tae Kim, Man Young Sung, Sangsig Kim, Hyon Soo Han

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The dark current, photocurrent and photoluminescence (PL) of networked GaN nanowires were characterized in this study. GaN nanowires were synthesized from Ni particles dispersed on an alumina substrate, and subsequent Ti deposition was performed on the as-synthesized GaN nanowires to form electrodes. For the networked GaN nanowires, a significant dark current was observed and the I-V characteristics of the dark current and photocurrent were independent of temperature in magnitude and shape. These results indicate that the GaN nanowires were networked electrically between the electrodes and that the electronic states of these nanowires were degenerate. In addition, the correlation between the photocurrent and PL of the networked GaN nanowires was examined. The characteristics of the green-band emission were similar to those of the photoresponse, and the wavelength range of the green-band emission exactly overlapped that of the below-gap absorption band in the photocurrent spectra. These results indicate that the green emission and the photoresponse have a common origin.

Original languageEnglish
Pages (from-to)6868-6872
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume43
Issue number10
DOIs
Publication statusPublished - 2004 Oct 1

Fingerprint

Photocurrents
Nanowires
photocurrents
Photoluminescence
nanowires
photoluminescence
Dark currents
dark current
Electrodes
electrodes
Electronic states
Absorption spectra
Alumina
aluminum oxides
absorption spectra
Wavelength
Substrates
electronics
wavelengths

Keywords

  • Ball milling
  • Green-band emission
  • Networked GaN nanowires
  • Photocurrent
  • Photoluminescence

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Photocurrent and photoluminescence characteristics of networked GaN nanowires. / Kang, Myungil; Lee, Jong Soo; Sim, Sung Kyu; Kim, Hyunsuk; Min, Byungdon; Cho, Kyoungah; Kim, Gyu-Tae; Sung, Man Young; Kim, Sangsig; Han, Hyon Soo.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 43, No. 10, 01.10.2004, p. 6868-6872.

Research output: Contribution to journalArticle

Kang, Myungil ; Lee, Jong Soo ; Sim, Sung Kyu ; Kim, Hyunsuk ; Min, Byungdon ; Cho, Kyoungah ; Kim, Gyu-Tae ; Sung, Man Young ; Kim, Sangsig ; Han, Hyon Soo. / Photocurrent and photoluminescence characteristics of networked GaN nanowires. In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers. 2004 ; Vol. 43, No. 10. pp. 6868-6872.
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