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Browse Journals & Magazines > Applied Physics Letters ...> Volume:101 Issue:12 Help

An energy-harvesting scheme utilizing Ga-rich CuIn(1-x)GaxSe2 quantum dots for dye-sensitized solar cells

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5 Author(s)
Lin, Chin-An ; Institute of Photonics and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan ; Huang, K.P. ; Ho, S.T. ; Huang, Mei-Wen
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Ga-rich CuIn(1-x)GaxSe2 (CIGS) quantum dots (QDs) with a wide bandgap of 1.58 eV were utilized in dye-sensitized solar cells for energy harvesting. Ga-rich CIGS QDs at TiO2 photoanodes afford the recombination reduction and thus suppress the dark current, leading to the increase of short-circuit current from 14.47 to 15.27 mA·cm-2 and open-circuit voltage from 751 to 762 mV. This is due to well-adjusted conduction band minimum of Ga-rich CIGS QDs between that of TiO2 and excited state oxidation potential of N719, enhancing the photoelectron collection and suppressing electron back-transfer from TiO2 to oxidized redox species in the electrolyte.

Published in:
Applied Physics Letters  (Volume:101 ,  Issue: 12 )

Date of Publication: Sep 2012

Page(s):
123901 - 123901-4
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.4751469
Product Type:
Journals & Magazines
Date of Current Version :
20 September 2012
Issue Date :
Sep 2012

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