Electroluminescence from ZnO nanowire/polymer composite p-n junction
Journal
Applied Physics Letters
Journal Volume
88
Journal Issue
17
Pages
173503-1 - 173503-3
Date Issued
2006
Author(s)
Chang, C.-Y.
Tsao, F.-C.
Pan, C.-J.
Chi, G.-C.
Wang, H.-T.
Chen, J.-J.
Ren, F.
Norton, D.P.
Pearton, S.J.
Chen, K.-H.
Abstract
The characteristics of a hybrid p-n junction consisting of the hole-conducting polymer poly(3,4-ethylene-dioxythiophene)-poly(styrene-sulfonate) (PEDOT/PSS) and n-ZnO nanorods grown on an n-GaN layer on sapphire are reported. Spin coating of polystyrene was used to electrically isolate neighboring nanorods and a top layer of transparent conducting indium tin oxide (ITO) was used to contact the PEDOT/PSS. Multiple peaks are observed in the electroluminescence spectrum from the structure under forward bias, including ZnO band edge emission at ∼383nm as well as peaks at 430, 640, and 748nm. The threshold bias for UV light emission was <3V, corresponding to a current density of 6.08Acm−2 through the PEDOT/PSS at 3V.
Publisher
American Institute of Physics
Type
journal article