Chemically specific dynamic characterization of photovoltaic and photoconductivity effects of surface nanostructures

Date
2010
Authors
Ekiz, O. Ö.
Mizrak, K.
Dâna, A.
Advisor
Instructor
Source Title
ACS Nano
Print ISSN
1936-0851
Electronic ISSN
Publisher
American Chemical Society
Volume
4
Issue
4
Pages
1851 - 1860
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Abstract

We report characterization of photovoltaic and photoconductivity effects on nanostructured surfaces through light induced changes in the X-ray photoelectron spectra (XPS). The technique combines the chemical specificity of XPS and the power of surface photovoltage spectroscopy (SPV), with the addition of the ability to characterize photoconductivity under both static and dynamic optical excitation. A theoretical model that quantitatively describes the features of the observed spectra is presented. We demonstrate the applicability of the model on a multitude of sample systems, including homo- and heterojunction solar cells, CdS nanoparticles on metallic or semiconducting substrates, and carbon nanotube films on silicon substrates.

Course
Other identifiers
Book Title
Keywords
Cadmium sulfide, Carbon nanotubes, Dynamic characterization, Photoconductivity, Photovoltaics, Semiconductor nanoparticles, Silicon, Surface photovoltage, X-ray photoelectron spectroscopy, Dynamic characterization, Photovoltaics, Semiconductor nanoparticles, Silicon surfaces, Surface photovoltage, Cadmium, Cadmium compounds, Cadmium sulfide, Carbon films, Carbon nanotubes, Heterojunctions, Nanoparticles, Photoconductivity, Photoexcitation, Photoionization, Photons, Photovoltaic effects, Semiconducting cadmium compounds, Semiconducting films, Semiconducting silicon, Semiconducting silicon compounds, Surface properties, X ray photoelectron spectroscopy
Citation
Published Version (Please cite this version)