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Effects of a perfluorinated compound as an additive on the power conversion efficiencies of polymer solar cells

Title
Effects of a perfluorinated compound as an additive on the power conversion efficiencies of polymer solar cells
Author(s)
Jeong, SeonjuWoo, Sung-HoLyu, Hong-KunHan, Yoon Soo
Issued Date
2011-07
Citation
Solar Energy Materials and Solar Cells, v.95, no.7, pp.1908 - 1914
Type
Article
Author Keywords
Perfluorinated compoundPolymer solar cellsAdditivesP3HTPCBM
Keywords
AbsorbancesAdditivesBenzonitrilesBlend FilmsBuffer LayersButyric ACIDConversion EfficiencyCrystal SizeDepth ProfilingEstersFill FactorFILMSFluorineFluorine AtomsHole MobilityIMPROVemENTINTERPENETRATING NETWORKMethyl EstersMorphologyOPEN-CIRCUIT VOLTAGEP3HTPCBMPerfluorinated CompoundPerfluorinated CompoundsPERFORMANCEPHOTOVOLTAIC DEVICESPoly (3-Hexylthiophene)POLY(3-HEXYLTHIOPHENE)Polymer Solar CellsPolymersPolythiophenePower Conversion EfficienciesSolar CellsTrifluoromethylUV Visible Absorption SpectrumX Ray MeasurementsXPS Depth Profiling
ISSN
0927-0248
Abstract
A perfluorinated compound, 4-amino-2-(trifluoromethyl)benzonitrile (ATMB), was applied as an additive to polymer solar cells (PSCs) with P3HT [poly(3-hexylthiophene)]:PCBM [[6,6]-phenyl-C 61-butyric acid methyl ester] blend films. The addition of 6 wt% ATMB to a P3HT:PCBM layer led to an increased power conversion efficiency of 5.03% due to the enhanced short circuit current and fill factor when compared with that of the reference cell without an additive. On the other hand, the devices with 4-aminobenzonitrile as an additive, not containing fluorine atoms in the molecule, displayed lower PCEs than that of the reference cell. The UVvisible absorption spectra, X-ray measurements and carrier mobility studies revealed that ATMB facilitated ordering of the P3HT chains, resulting in higher absorbance, larger crystal size of P3HT and enhanced hole mobility. XPS depth profiling measurements also showed that the additive molecules were predominantly positioned in the range of 25 nm under the surface of the P3HT:PCBM film, leading to improved fill factor. © 2011 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/3803
DOI
10.1016/j.solmat.2011.02.019
Publisher
Elsevier B.V.
Related Researcher
  • 우성호 Woo, Sungho 에너지융합연구부
  • Research Interests
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Appears in Collections:
Division of Energy Technology 1. Journal Articles
Division of Electronics & Information System 1. Journal Articles

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