Hybrid Nanorod-Polymer Solar Cell: Final Report; 19 July 1999--19 September 2002

Research output: NRELSubcontract Report

Abstract

With the support of this grant, we successfully demonstrated that semiconductor nanorods can be used to fabricate readily processed and efficient hybrid solar cells together with polymers. By controlling nanorod length, we changed the distance over which electrons are transported directly through the thin-film device. Tuning the bandgap by altering the nanorod radius enabled us to optimize theoverlap between the absorption spectrum of the cell and the solar emission spectrum. A photovoltaic device consisting of 7-nm by 60-nm CdSe nanorods and the conjugated polymer poly-3(hexylthiophene) was assembled from solution with an external quantum efficiency of over 54% and a monochromatic power conversion efficiency of 6.9% under 0.1 mW/cm2 illumination at 515 nm. Under AM 1.5 Global solarconditions, we obtained a power conversion efficiency of 1.7%.
Original languageAmerican English
Number of pages13
StatePublished - 2003

Bibliographical note

Work performed by University of California at Berkeley, Berkeley, California.

NREL Publication Number

  • NREL/SR-520-34567

Keywords

  • bandgap
  • devices
  • hybrid solar cells
  • nanorod
  • photocurrent
  • polymers
  • power conversion
  • PV
  • quantum efficiency (QE)
  • semiconductor
  • thin film
  • tuning

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