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  • Bao, Qinye, et al. (author)
  • Effects of ultraviolet soaking on surface electronic structures of solution processed ZnO nanoparticle films in polymer solar cells
  • 2014
  • In: Journal of Materials Chemistry A. - : Royal Society of Chemistry. - 2050-7488. ; 2:41, s. 17676-17682
  • Journal article (peer-reviewed)abstract
    • We systematically show the effect of UV-light soaking on surface electronic structures and chemical states of solution processed ZnO nanoparticle (ZnONP) films in UHV, dry air and UV-ozone. UV exposure in UHV induces a slight decrease in work function and surface-desorption of chemisorbed oxygen, whereas UV exposure in the presence of oxygen causes an increase in work function due to oxygen atom vacancy filling in the ZnO matrix. We demonstrate that UV-light soaking in combination with vacuum or oxygen can tune the work function of the ZnONP films over a range exceeding 1 eV. Based on photovoltaic performance and diode measurements, we conclude that the oxygen atom vacancy filling occurs mainly at the surface of the ZnONP films and that the films consequently retain their n-type behavior despite a significant increase in the measured work function.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Fahlman, Mats (1)
Liu, Xianjie (1)
Bao, Qinye (1)
Margeat, Olivier (1)
Gao, Feng (1)
Xia, Yuxin (1)
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Kauffmann, Louis-Dom ... (1)
Ackermann, Jorg (1)
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University
Linköping University (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2014 (1)

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