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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 12 — Jun. 6, 2011
  • pp: 11873–11879

Electroluminescence of ZnO nanocrystal in sputtered ZnO-SiO2 nanocomposite light-emitting devices

Jiun-Ting Chen, Wei-Chih Lai, Chi-Heng Chen, Ya-Yu Yang, Jinn-Kong Sheu, and Li-Wen Lai  »View Author Affiliations


Optics Express, Vol. 19, Issue 12, pp. 11873-11879 (2011)
http://dx.doi.org/10.1364/OE.19.011873


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Abstract

We have demonstrated the electroluminescence (EL) of Ga:ZnO/i-ZnO-SiO2 nanocomposite/p-GaN n-i-p heterostructure light-emitting devices (LEDs). ZnO nano-clusters with sizes distributing from 2 to 7nm were found inside the co-sputtered i-ZnO-SiO2 nanocomposite layer under the observation of high-resolution transparent electron microscope. A clear UV EL at 376 nm from i-ZnO-SiO2 nanocomposite in these p-i-n heterostructure LEDs was observed under the forward current of 9 mA. The EL emission peak at 376 and 427nm of the Ga:ZnO/i-ZnO-SiO2 nanocomposite/p-GaN n-i-p heterostructure LEDs were attributed to the radiative recombination from the ZnO clusters and the Mg acceptor levels in the p-GaN layer, respectively.

© 2011 OSA

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(220.4241) Optical design and fabrication : Nanostructure fabrication

ToC Category:
Optical Devices

History
Original Manuscript: March 30, 2011
Revised Manuscript: May 14, 2011
Manuscript Accepted: May 23, 2011
Published: June 3, 2011

Citation
Jiun-Ting Chen, Wei-Chih Lai, Chi-Heng Chen, Ya-Yu Yang, Jinn-Kong Sheu, and Li-Wen Lai, "Electroluminescence of ZnO nanocrystal in sputtered ZnO-SiO2 nanocomposite light-emitting devices," Opt. Express 19, 11873-11879 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-12-11873


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