Nanocomposite solar cells based on conjugated polymer/ PbSe quantum dot

Xiaomei Jiang*, Sergey B. Lee, Igor B. Altfeder, Anvar A. Zakhidov, Richard D. Schaller, Jeff M. Pietryga, Victor I. Klimov

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations


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, J sc, of ∼ 0.2mA/cm 2, 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 J ph ∼ 1 mA/cm 2 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.

Original languageEnglish (US)
Article number59381F
Pages (from-to)1-9
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2005
EventOrganic Photovoltaics VI - San Diego, CA, United States
Duration: Aug 2 2005Aug 4 2005


  • Conjugated polymer
  • Plastic solar cell
  • Polythiophene
  • Quantum dot
  • Semiconductor nanocrystals

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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