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Proceedings Paper

Characterization of charge transport via in situ potentiometry in bulk heterojunction organic photovoltaic materials
Author(s): Eric Danielson; Christopher Lombardo; Ananth Dodabalapur
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Paper Abstract

The most promising active material for organic photovoltaic (OPV) cells is the polymer/fullerene bulk heterojunction (BHJ) system, but charge transport and recombination mechanisms in these materials have yet to be completely understood. We report the use of lateral bulk heterojunction devices to perform novel material diagnostics on the BHJ system. Using electron beam lithography, we fabricate devices with up to 24 voltage probes embedded in the channel in order to perform in situ potentiometry. From current vs. voltage measurements performed at a variety of light intensities, we are able to describe the charge transport properties in three distinct regions of a polymer/fullerene BHJ device and determine the dominant recombination mechanism of the OPV material. We note that these are the first such measurements performed on OPV materials. Such measurements will be very useful for materials diagnostics.

Paper Details

Date Published: 13 September 2012
PDF: 9 pages
Proc. SPIE 8477, Organic Photovoltaics XIII, 84770F (13 September 2012);
Show Author Affiliations
Eric Danielson, The Univ. of Texas at Austin (United States)
Christopher Lombardo, The Univ. of Texas at Austin (United States)
Ananth Dodabalapur, The Univ. of Texas at Austin (United States)

Published in SPIE Proceedings Vol. 8477:
Organic Photovoltaics XIII
Zakya H. Kafafi; Christoph J. Brabec; Paul A. Lane, Editor(s)

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