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Energy Express

Energy Express

  • Editor: Bernard Kippelen
  • Vol. 19, Iss. S3 — May. 9, 2011
  • pp: A319–A325

Ultraviolet electroluminescence from hybrid inorganic/organic ZnO/GaN/poly(3-hexylthiophene) dual heterojunctions

Yungting Chen, Hanyu Shih, Chunhsiung Wang, Chunyi Hsieh, Chihwei Chen, Yangfang Chen, and Taiyuan Lin  »View Author Affiliations


Optics Express, Vol. 19, Issue S3, pp. A319-A325 (2011)
http://dx.doi.org/10.1364/OE.19.00A319


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Abstract

Based on hybrid inorganic/organic n-ZnO nanorods/p-GaN thin film/poly(3-hexylthiophene)(P3HT) dual heterojunctions, the light emitting diode (LED) emits ultraviolet (UV) radiation (370 nm – 400 nm) and the whole visible light (400 nm −700 nm) at the low injection current density. Meanwhile, under the high injection current density, the UV radiation overwhelmingly dominates the room-temperature electroluminescence spectra, exponentially increases with the injection current density and possesses a narrow full width at half maximum less than 16 nm. Comparing electroluminescence with photoluminescence spectra, an enormously enhanced transition probability of the UV luminescence in the electroluminescence spectra was found. The P3HT layer plays an essential role in helping the UV emission from p-GaN material because of its hole-conductive characteristic as well as the band alignment with respect to p-GaN. With our new finding, the result shown here may pave a new route for the development of high brightness LEDs derived from hybrid inorganic/organic heterojuctions.

© 2011 OSA

OCIS Codes
(160.4890) Materials : Organic materials
(230.3670) Optical devices : Light-emitting diodes
(160.4236) Materials : Nanomaterials

ToC Category:
Light-Emitting Diodes

History
Original Manuscript: February 17, 2011
Revised Manuscript: April 7, 2011
Manuscript Accepted: April 14, 2011
Published: April 18, 2011

Citation
Yungting Chen, Hanyu Shih, Chunhsiung Wang, Chunyi Hsieh, Chihwei Chen, Yangfang Chen, and Taiyuan Lin, "Ultraviolet electroluminescence from hybrid inorganic/organic ZnO/GaN/poly(3-hexylthiophene) dual heterojunctions," Opt. Express 19, A319-A325 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-S3-A319


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