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Proceedings Paper

Nanocomposite solar cells based on conjugated polymers and PbSe quantum dots
Author(s): Xiaomei Jiang; Sergey B. Lee; Igor B. Altfeder; Anvar A. Zakhidov; Richard D. Schaller; Jeff M. Pietryga; Victor I. Klimov
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Paper Abstract

We report a novel type of nanocomposite of conjugated polymer (regio-regular polythiophene) with infrared-sensitive, PbSe quantum dots (QD), which have size-tunable lowest-energy absorption bands between 0.3 and 1 eV. Thin film devices show very good diode characteristics and sizable photovoltaic response with an open circuit voltage, Voc, of ~ 0.3-0.4 V and short circuit current density, Jsc, of ~ 0.2mA/cm2, which is significantly higher than recently reported in PbS QD-based devices. This is the evidence of a quite efficient photoinduced charge transfer between the polymer and QD, with infrared sensitivity. Photocurrent under reverse bias is significantly enhanced to Jph ~ 1 mA/cm2 indicating that the polythiophene/PbSe QD system can be used as effective infrared photodetectors. Detailed spectroscopic studies of photoresponse over a wide spectral range are presented. Quenching of photoluminescence by PbSe QDs has also been studied to gain more understanding of energy and charge transfer in this system.

Paper Details

Date Published: 3 October 2005
PDF: 9 pages
Proc. SPIE 5938, Organic Photovoltaics VI, 59381F (3 October 2005); doi: 10.1117/12.619361
Show Author Affiliations
Xiaomei Jiang, The Univ. of Texas at Dallas (United States)
Sergey B. Lee, The Univ. of Texas at Dallas (United States)
Igor B. Altfeder, The Univ. of Texas at Dallas (United States)
Anvar A. Zakhidov, The Univ. of Texas at Dallas (United States)
Richard D. Schaller, Los Alamos National Lab. (United States)
Jeff M. Pietryga, Los Alamos National Lab. (United States)
Victor I. Klimov, Los Alamos National Lab. (United States)

Published in SPIE Proceedings Vol. 5938:
Organic Photovoltaics VI
Zakya H. Kafafi; Paul A. Lane, Editor(s)

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