Improving efficiency of MEH-PPV/TiO2 solar cells by lithium salt modification

Barkhouse, D. A. R., Bishop, H. E., Henry, B. M., Webster, G. R., Burn, P. L. and Assender, H. E. (2010) Improving efficiency of MEH-PPV/TiO2 solar cells by lithium salt modification. Organic Electronics, 11 4: 649-657. doi:10.1016/j.orgel.2010.01.005

Author Barkhouse, D. A. R.
Bishop, H. E.
Henry, B. M.
Webster, G. R.
Burn, P. L.
Assender, H. E.
Title Improving efficiency of MEH-PPV/TiO2 solar cells by lithium salt modification
Journal name Organic Electronics   Check publisher's open access policy
ISSN 1566-1199
Publication date 2010-04
Sub-type Article (original research)
DOI 10.1016/j.orgel.2010.01.005
Volume 11
Issue 4
Start page 649
End page 657
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier B.V.
Collection year 2011
Language eng
Formatted abstract
The modification of MEH-PPV/TiO2 photovoltaic devices with the lithium salt, Li[CF3SO2]2N, is shown to result in a 40% increase in both the short-circuit current and fill factor while not affecting the open-circuit voltage. The power conversion efficiency of the modified devices is 1.05% under 80 mW/cm2 simulated solar illumination, which is twice that of the control device without the salt and the highest reported to date for a polymer/TiO2 solar cell. The increased performance is attributed to a large improvement in the hole mobility of the MEH-PPV, as measured by space-charge-limited current measurements, in the presence of the lithium salt. Modification of the devices with LiClO4 is not as effective at improving device performance. Secondary ion mass spectroscopy measurements reveal that the poorer performance is due to a lower degree of Li diffusion into the polymer layer for LiClO4 than for Li[CF3SO2]2N. © 2010 Elsevier B.V. All rights reserved.
Keyword MEHPPV
Hole mobility
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Organic Photonics and Electronics
Official 2011 Collection
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 14 times in Scopus Article | Citations
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Created: Sun, 04 Apr 2010, 00:02:00 EST