Energy level alignment of polythiophene/ZnO hybrid solar cells

W. Feng, S. Rangan, Y. Cao, E. Galoppini, R. A. Bartynski, Eric Garfunkel

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Energy level alignment at interfaces is critical for fundamental understanding and optimization of organic photovoltaics (OPV) as band offsets of the donor and acceptor materials largely determine the open circuit voltage (Voc) of the device. Using ultraviolet photoemission spectroscopy (UPS) and inverse photoemission spectroscopy (IPS), we examined the correlation between energy level alignment and photovoltaic properties of a model bilayer hybrid solar cell incorporating electrodeposited polythiophene (e-PT) films on ZnO planar substrates. The electrolyte anion (BF4-, PF6-, ClO4- or CF3SO 3-) in the electrodeposition solution was found to have a strong influence on the e-PT film morphology and adhesion, the energy level alignment at the interface, and ultimately the Voc of the photovoltaic devices.

Original languageEnglish
Pages (from-to)7034-7044
Number of pages11
JournalJournal of Materials Chemistry A
Volume2
Issue number19
DOIs
Publication statusPublished - May 21 2014

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Electron energy levels
Solar cells
Photoelectron spectroscopy
Polymers
Open circuit voltage
Ultraviolet spectroscopy
Electrodeposition
Electrolytes
Anions
Negative ions
Adhesion
Substrates
polythiophene
perchlorate

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Energy level alignment of polythiophene/ZnO hybrid solar cells. / Feng, W.; Rangan, S.; Cao, Y.; Galoppini, E.; Bartynski, R. A.; Garfunkel, Eric.

In: Journal of Materials Chemistry A, Vol. 2, No. 19, 21.05.2014, p. 7034-7044.

Research output: Contribution to journalArticle

Feng, W, Rangan, S, Cao, Y, Galoppini, E, Bartynski, RA & Garfunkel, E 2014, 'Energy level alignment of polythiophene/ZnO hybrid solar cells', Journal of Materials Chemistry A, vol. 2, no. 19, pp. 7034-7044. https://doi.org/10.1039/c4ta00937a
Feng, W. ; Rangan, S. ; Cao, Y. ; Galoppini, E. ; Bartynski, R. A. ; Garfunkel, Eric. / Energy level alignment of polythiophene/ZnO hybrid solar cells. In: Journal of Materials Chemistry A. 2014 ; Vol. 2, No. 19. pp. 7034-7044.
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