Transient surface photovoltage in n-and p-GaN as probed by x-ray photoelectron spectroscopy
Author
Sezen, H.
Özbay, Ekmel
Aktas, O.
Süzer, Şefik
Date
2011Source Title
Applied Physics Letters
Print ISSN
0003-6951
Electronic ISSN
1077-3118
Volume
98
Issue
11
Language
English
Type
ArticleItem Usage Stats
162
views
views
141
downloads
downloads
Abstract
Transient surface photovoltage (SPV) of n and p-GaN was measured using x-ray photoelectron spectroscopy (XPS) with a time resolution of 0.1 s. The measured SPV transients for both n- and p-GaN are 0.1 s, and for the n-GaN they are not affected by flood-gun electrons. However, for the p-GaN, the transient character of the SPV is dramatically changed in the presence of flood-gun electrons. The combination of time-resolved XPS, flood gun, and laser illumination give us a new way to study the surface electronic structure and other surface properties of semiconducting materials in a chemically specific fashion.
Keywords
Laser illuminationSemiconducting materials
Surface electronic structures
Surface photovoltages
Time resolution
Time-resolved
XPS
Electronic structure
Gallium nitride
Photoelectricity
Photons
Surface properties
Surface structure
X ray photoelectron spectroscopy
Permalink
http://hdl.handle.net/11693/21989Published Version (Please cite this version)
http://dx.doi.org/10.1063/1.3564892Collections
Related items
Showing items related by title, author, creator and subject.
-
Surface evolution of 4H-SiC(0001) during in-situ surface preparation and its influence on graphene properties
Ul Hassan J.; Meyer, A.; Çakmakyapan, Semih; Kazar, Özgür; Flege J.I.; Falta J.; Özbay, Ekmel; Janzén, E. (Trans Tech Publications, Switzerland, 2013)The evolution of SiC surface morphology during graphene growth process has been studied through the comparison of substrate surface step structure after in-situ etching and graphene growth in vacuum. Influence of in-situ ... -
Fine-tuning the dispersion and the mobility of BaO domains on NO x storage materials via TiO2 anchoring sites
Andonova, S. M.; Şentürk, G. S.; Ozensoy, E. (American Chemical Society, 2010)In an attempt to control the surface dispersion and the mobility of BaO domains on NOx storage materials, TiO2/TiOx anchoring sites were introduced on/inside the conventional γ-Al 2O3 support matrix. BaO/TiO2/Al 2O3 ternary ... -
Surface wave splitter based on metallic gratings with sub-wavelength aperture
Caglayan H.; Özbay, Ekmel (Optical Society of American (OSA), 2008)We investigated the splitting of surface electromagnetic waves trapped at the output surface of a one-dimensional metallic grating structure. The output gratings of the structure asymmetrically such that the output surfaces ...