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Song, Hyun-Kon
eclat: ElectroChemistry Lab of Advanced Technology
Research Interests
  • Electrochemical analysis, electroactive materials, electrochemistry-based energy devices

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The effect of introducing a buffer layer to polymer solar cells on cell efficiency

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Title
The effect of introducing a buffer layer to polymer solar cells on cell efficiency
Author
Kim, Gi-HwanSong, Hyun-KonKim, Jin Young
Keywords
Bulk heterojunction; Bulk properties; Cell efficiency; Charge transfer resistance; Ethylenedioxythiophenes; Fill factor; Interfacial property; PEDOT:PSS; Poly(4-styrenesulfonate); Polymer solar cells
Issue Date
201104
Publisher
ELSEVIER SCIENCE BV
Citation
SOLAR ENERGY MATERIALS AND SOLAR CELLS, v.95, no.4, pp.1119 - 1122
Abstract
The effect of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) as a buffer layer was investigated in polymer solar cells (PSCs). Four different types of PEDOT:PSS were used: PH, PHS00 and their DMSO (dimethylsulfoxide)-doped counterparts. The efficiency of PSCs was independent of the electric conductivity of the buffer layer as a bulk property while it was significantly related to interfacial properties between the buffer layer and a bulk-heterojunction (BHJ) layer. The interfacial properties included charge transfer resistance (R(CT)), hole mobility (mu(h)) and contact angle (theta) of the solution of BHJ on the buffer layer. Lower R(C), higher mu(h), and smaller theta led to the higher fill factor (up to 72%), enabling highly efficient PSCs with efficiency (eta)=4.25%.
URI
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DOI
http://dx.doi.org/10.1016/j.solmat.2010.12.026
ISSN
0927-0248
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