Increased efficiency of small molecule photovoltaic cells by insertion of a MoO3 hole-extracting layer

I. Hancox; K. V. Chauhan; P. Sullivan; R. A. Hatton; A. Moshar; C. P. A. Mulcahy; T. S. Jones

doi:10.1039/B915764F

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Energy & Environmental Science

Issue 1, 2010

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Increased efficiency of small molecule photovoltaic cells by insertion of a MoO₃ hole-extracting layer

I. Hancox , K. V. Chauhan , P. Sullivan , R. A. Hatton , A. Moshar , C. P. A. Mulcahy and T. S. Jones

Energy Environ. Sci., 2010, 3, 107-110

DOI: 10.1039/B915764F
Received 31 Jul 2009, Accepted 06 Oct 2009
First published on the web 26 Oct 2009

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We report a [similar] 60% increase in open circuit voltage (V_oc) and power conversion efficiency in a chloroaluminium phthalocyanine (ClAlPc)/fullerene (C₆₀) 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/C₆₀ 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.

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Articles By

I. Hancox
K. V. Chauhan
P. Sullivan
R. A. Hatton
A. Moshar
C. P. A. Mulcahy
T. S. Jones

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Energy & Environmental Science

Increased efficiency of small molecule photovoltaic cells by insertion of a MoO₃ hole-extracting layer

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