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Surface states of ZnO nanoparticles effect on the performance of inverted-organic solar cells
Tianjin University of Technology, Peoples R China .
Tianjin University of Technology, Peoples R China .
Tianjin University of Technology, Peoples R China .
Tianjin University of Technology, Peoples R China .
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2013 (English)In: JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY, American Institute of Physics (AIP) , 2013, Vol. 5, no 5Conference paper, Published paper (Refereed)
Abstract [en]

ZnO is a promising material used as the electron transport layer in the inverted organic solar cells (IOSCs). However, the electrical or photoelectric properties of ZnO nanoparticles are governed by the surface states of the nanoparticles. Here, we demonstrate that the large number of hydroxyl (-OH) existed on the ZnO nanoparticles films have a vast impact on the performance of IOSCs with the structure of ITO/ZnO/poly(3-hexylthiophene) (P3HT):[6,6]-phenyl C-61 butyric acid methyl ester (PCBM)/MoO3/Ag. The surface hydroxyl groups depredate active layer via elevating photocatalytic activity of the ZnO, hence deteriorate the device performance. Experimental results show that hydroxyl groups can be effectively detached from ZnO film by annealing. Hydroxyl groups detach more with increasing annealing temperature, resulting in less degradation of the active layer. Therefore, the efficiency is significantly improved due to increased photo-current density and decreased series resistance of IOSCs. The best device exhibits a power conversion efficiency of 3.05% after annealing at 150 degrees C.

Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 2013. Vol. 5, no 5
National Category
Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-102409DOI: 10.1063/1.4821219ISI: 000326641300020OAI: oai:DiVA.org:liu-102409DiVA: diva2:677350
Conference
Asia-Pacific Forum on Renewable Energy
Available from: 2013-12-09 Created: 2013-12-09 Last updated: 2013-12-09

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Zhang, Fengling

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf