Journal
APPLIED PHYSICS LETTERS
Volume 104, Issue 15, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4871582
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Funding
- NSF [ECCS-0644945, ECCS-1102011]
- Oak Ridge National Laboratory by the Division of Scientific User Facilities, U.S. Department of Energy [CNMS2012-106, CNMS2012-107]
- International Cooperation and Exchange Program [21161160445, 61077020]
- National Natural Science Foundation of China
- National Significant Program [Quantum Control: 2013CB922104]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1102011] Funding Source: National Science Foundation
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In this paper, the decrease of fill factor with increase of light illumination intensity was investigated through light assisted impedance studies based on ITO/poly(3,4-ethylenedioxythiophene):poly (styrene sulfonate)/[poly(3-hexylthiophene):1-(3-methyloxycarbonyl)-propyl-1-phenyl(6,6)C-61 (P3HT:PCBM)]/Ca/Al solar cells. It was found that the charge accumulation at the electrode interface causes a decrease in parallel resistance (Rp), consequently a reduction in fill factor. Moreover, it has also been found that the photocurrent loss near the open-circuit voltage through bimolecular recombination also leads to the reduction of fill factor with increasing light intensity in P3HT: PCBM solar cells. (C) 2014 AIP Publishing LLC.
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