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A ZnO nanorod inorganic/organic heterostructure light-emitting diode emitting at 342 nm

Sun, X. W. and Huang, J. Z. and Wang, J. X. and Xu, Z. (2008) A ZnO nanorod inorganic/organic heterostructure light-emitting diode emitting at 342 nm. NANO LETTERS, 8 (4). pp. 1219-1223.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl080340z?prev...

Abstract

An inorganic/organic heterostructure light-emitting diode consisting of the hole-transporting layer N/N'-di(naphth-2-yl)-N,N'-diphenylbenzidine (NPB) and n-type ZnO nanorods fabricated by hydrothermal decomposition is reported. Poly(methyl methacrylate) was used to form a smooth surface on top of ZnO nanorod array with ZnO nanorod tops exposed for subsequent NPB deposition. An unusual ultraviolet emission at 342 nm was observed in the electroluminescence spectrum. Compared to band gap energy of ZnO (3.37 eV), the excitonic emission is blue-shifted and broadened. The mechanism of the blue shift is discussed in terms of the energy band diagram of the heterostructure.

Item Type:Article
Subjects:Material Science > Functional and hybrid materials
Physical Science > Nanoelectronics
Engineering > Nanotechnology applications in ICT
ID Code:434
Deposited By:Farnush Anwar
Deposited On:05 Dec 2008 15:46
Last Modified:05 Dec 2008 15:46

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