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Journal of Photonics for Energy

Lateral mobility measurements in organic bulk heterojunctions: comparison of field-effect and space charge mobilities
Author(s): Christopher Lombardo; Eric Danielson; Ananth Dodabalapur; Zi-En Ooi
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Paper Abstract

Measurement of charge transport and recombination parameters in bulk heterojunction (BHJ) materials is of great interest to better understand the science underlying organic solar cells. We discuss the use of space charge limited current measurements under solar illumination to measure the mobility of lateral structures in which charge transport is parallel to the plane of the substrate. We compare these mobilities with mobilities calculated from field-effect measurements of the same structures. Changes in mobility as a function of device length and electric field are consistent with numerical simulations of these lateral structures. Lateral organic photovoltaic structures are potentially very useful in evaluating a number of basic material properties of BHJs including three-dimensional transport.

Paper Details

Date Published: 5 April 2012
PDF: 8 pages
J. Photon. Energy 2(1) 021007 doi: 10.1117/1.JPE.2.021007
Published in: Journal of Photonics for Energy Volume 2, Issue 1
Show Author Affiliations
Christopher Lombardo, The Univ. of Texas at Austin (United States)
Eric Danielson, The Univ. of Texas at Austin (United States)
Ananth Dodabalapur, The Univ. of Texas at Austin (United States)
Zi-En Ooi, A*STAR Institute of Materials Research and Engineering (Singapore)

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