Special Section on Organic Photovoltaics

Lateral mobility measurements in organic bulk heterojunctions: comparison of field-effect and space charge mobilities

[+] Author Affiliations
Christopher Lombardo, Ananth Dodabalapur

The University of Texas at Austin, Microelectronics Research Center, Austin, Texas 78758

The University of Texas at Austin, Department of Electrical and Computer Engineering, Austin, Texas 78712

Eric Danielson

The University of Texas at Austin, Microelectronics Research Center, Austin, Texas 78758

The University of Texas at Austin, Materials Science and Engineering Program, Austin, Texas 78712

Zi En Ooi

Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore

J. Photon. Energy. 2(1), 021007 (Apr 05, 2012). doi:10.1117/1.JPE.2.021007
History: Received September 30, 2011; Revised February 3, 2012; Accepted February 3, 2012
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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.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Christopher Lombardo ; Eric Danielson ; Zi En Ooi and Ananth Dodabalapur
"Lateral mobility measurements in organic bulk heterojunctions: comparison of field-effect and space charge mobilities", J. Photon. Energy. 2(1), 021007 (Apr 05, 2012). ; http://dx.doi.org/10.1117/1.JPE.2.021007


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