Title
Understanding the (in)stability of semiconductor pigments by a thermodynamic approach Understanding the (in)stability of semiconductor pigments by a thermodynamic approach
Author
Faculty/Department
Faculty of Sciences. Chemistry
Faculty of Design Sciences
Publication type
article
Publication
London ,
Subject
Physics
Chemistry
Source (journal)
Dyes and pigments. - London
Volume/pages
113(2015) , p. 409-415
ISSN
0143-7208
ISI
000346543200052
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Several artists pigments are semiconductors. Some of these materials appear stable over time, whereas others already show remarkable signs of degradation after limited time periods. The (in)stability of these pigments can be understood using a thermodynamic approach. For several pigment-related materials, the thermodynamic oxidation and reduction potential (ϕox and ϕred) were determined and evaluated considering the absolute energy positions of the valence and conduction band edges and the water redox potentials. The positions of ϕox and ϕred can be used in a fast screening of the stability of semiconductor pigments towards photoinduced corrosion in an aqueous/humid environment. This theoretical approach corresponds well with experimental data on pigment permanence and degradation phenomena found in literature.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/c8f629/df306169.pdf
E-info
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