Enhancement of surface potential buildup and decay of tris(8-quinolinato)aluminum film deposited on ultraviolet/ozone-treated gold electrodes

Kajimoto, N. and Muhamad, M.R. and Rahman, Saadah Abdul and Manaka, T. and Iwamoto, M. (2005) Enhancement of surface potential buildup and decay of tris(8-quinolinato)aluminum film deposited on ultraviolet/ozone-treated gold electrodes. Japanese Journal of Applied Physics, 44 (2). pp. 1091-1094. ISSN 0021-4922

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Abstract

The enhancement of the surface potential of tris(8-quinolinato)aluminum (Alq3) film deposited on ultraviolet (UV)/ozonetreated gold electrodes was confirmed by surface potential measurement, and the ordering of molecular dipoles was suggested. The enhanced surface potential of the order of 10 V decayed rapidly by photo irradiation, due to molecular dipole disordering, but a surface potential of 100-400mV remained. Interestingly, this remaining surface potential of Alq3 on the UV/ozonetreated gold electrode was always smaller than that of Alq3 film on an untreated gold electrode. It was concluded that the UV/ozone treatment is effective in decreasing the density of surface states at the Alq3-metal interface as well as for the enhancement of molecular dipole ordering.

Item Type: Article
Uncontrolled Keywords: surface potential Alq3 dipole space charge energy-level alignment light-emitting-diodes spectroscopy interfaces metal photoemission injection aluminum alq(3) ozone
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: miss munirah saadom
Date Deposited: 15 Jul 2013 07:33
Last Modified: 22 Mar 2019 01:11
URI: http://eprints.um.edu.my/id/eprint/7352

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