Hancox, I., Chauhan, K. V., Sullivan, Paul J., Hatton, Ross A., Moshar, A., Mulcahy, C. P. A. and Jones, T. S.. (2010) Increased efficiency of small molecule photovoltaic cells by insertion of a MoO3 hole-extracting layer. Energy & Environmental Science, Vol.3 (No.1). pp. 107-110. ISSN 1754-5692

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Abstract

We report a similar to 60% increase in open circuit voltage (V-oc) and power conversion efficiency in a chloroaluminium phthalocyanine (ClAlPc)/fullerene (C-60) planar heterojunction photovoltaic device after insertion of a MoO3 hole-extracting layer at the interface between the indium tin oxide (ITO) electrode and the ClAlPc donor layer, with an associated improvement in device stability. A similar improvement was observed in heterojunction devices based on mixed ClAlPc/C-60 layers. We propose that the improvements in device performance are due to the pinning of the ITO Fermi level to the valance band of the MoO3 interlayer, where the latter is closely aligned with the highest occupied molecular orbital of ClAlPc.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry T Technology > TJ Mechanical engineering and machinery T Technology > TP Chemical technology G Geography. Anthropology. Recreation > GE Environmental Sciences
Divisions:	Faculty of Science > Chemistry
Journal or Publication Title:	Energy & Environmental Science
Publisher:	Royal Society of Chemistry
ISSN:	1754-5692
Date:	2010
Volume:	Vol.3
Number:	No.1
Number of Pages:	4
Page Range:	pp. 107-110
Identification Number:	10.1039/b915764f
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Engineering and Physical Sciences Research Council (EPSRC), Royal Academy of Engineering
URI:	http://wrap.warwick.ac.uk/id/eprint/16636

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