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Feature Article
Quantum Dot Solar Cells. Semiconductor Nanocrystals as Light Harvesters†
Prashant V. Kamat
J. Phys. Chem. C, 2008, 112 (48), 18737-18753• DOI: • Publication Date (Web): 17 October 2008
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The Journal of Physical Chemistry C is published by the American Chemical
Society. 1155 Sixteenth Street ., Washington, DC 20036
J. Phys. Chem. C 2008, 112, 18737–18753 18737
CENTENNIAL FEATURE ARTICLE
Quantum Dot Solar Cells. Semiconductor Nanocrystals as Light Harvesters†
Prashant V. Kamat*
Notre Dame Radiation Laboratory Department of Chemistry & Biochemistry and Department of Chemical &
Biomolecular Engineering, Notre Dame, Indiana 46556
ReceiVed: July 30, 2008; ReVised Manuscript ReceiVed: August 26, 2008
The emergence of semiconductor nanocrystals as the building blocks of nanotechnology has opened up new
ways to utilize them in next generation solar cells. This paper focuses on the recent developments in the
utilization of semiconductor quantum dots for light energy conversion. Three major ways to utilize
semiconductor dots in solar cell include (i) metal-semiconductor or Schottky junction photovoltaic cell (ii)
polymer-semiconductor hybrid solar cell, and (iii) quantum dot sensitized solar cell. Modulation of band
energies through size control offers new ways to control photoresponse and photoconversion efficiency of
the solar cell. Various strategies to maximize photoinduced charge separation and electron transfer processes
for improving the overall efficiency of light energy con