Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/85708
Title: Surface passivation of (100)-oriented GaAs via plasma deposition of an ultrathin S-containing polymer film and its effect on photoluminescence
Authors: Yang, G.H.
Zhang, Y. 
Kang, E.T. 
Neoh, K.G. 
Huang, W.
Teng, J.H.
Issue Date: 21-Aug-2003
Source: Yang, G.H.,Zhang, Y.,Kang, E.T.,Neoh, K.G.,Huang, W.,Teng, J.H. (2003-08-21). Surface passivation of (100)-oriented GaAs via plasma deposition of an ultrathin S-containing polymer film and its effect on photoluminescence. Journal of Physical Chemistry B 107 (33) : 8592-8598. ScholarBank@NUS Repository.
Abstract: Ultrathin S-containing polymer films of about 5 nm in thickness were deposited on the HCl-etched (100)-oriented single-crystal GaAs substrates via RF plasma polymerization of bis(methylthio)methane (BMTM). The chemical composition and structure of the BMTM plasma-polymerized GaAs(100) surface (pp-BMTM-GaAs surface) were investigated by X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS), respectively. The XPS and ToF-SIMS results showed that the sulfur atoms from the plasma-polymerized BMTM (pp-BMTM) film were bonded to both the Ga and As atoms. The low-temperature photoluminescence efficiency of the so-passivated GaAs single crystal was increased by 2-fold. The growth of the oxide layer on the pp-BMTM-GaAs surface was effectively hindered for up to at least 2 months under the atmospheric conditions. The rate of surface oxidation was also reduced significantly in the presence of the pp-BMTM barrier when the HCl-etched GaAs(100) was exposed to water and H2O2 solution. The 180°-peel adhesion test results indicated that the pp-BMTM film adhered strongly to the GaAs(100) surface.
Source Title: Journal of Physical Chemistry B
URI: http://scholarbank.nus.edu.sg/handle/10635/85708
ISSN: 15206106
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

Page view(s)

31
checked on Feb 16, 2018

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.