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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Chin-An Lin
  • K. P. Huang
  • S. T. Ho
  • Mei-Wen Huang
  • Jr-Hau He

Detail(s)

Original languageEnglish
Article number123901
Journal / PublicationApplied Physics Letters
Volume101
Issue number12
Online published17 Sep 2012
Publication statusPublished - 17 Sep 2012
Externally publishedYes

Abstract

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.

Citation Format(s)

An energy-harvesting scheme utilizing Ga-rich CuIn(1-x)GaxSe2 quantum dots for dye-sensitized solar cells. / Lin, Chin-An; Huang, K. P.; Ho, S. T.; Huang, Mei-Wen; He, Jr-Hau.

In: Applied Physics Letters, Vol. 101, No. 12, 123901, 17.09.2012.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review