Fabrication of CuInTe 2 and CuInTe 2-x Se x ternary gradient quantum dots and their application to solar cells

Sungwoo Kim, Meejae Kang, Seajin Kim, Jin Hyuk Heo, Jun Hong Noh, Sang Hyuk Im, Sang Il Seok, Sang Wook Kim

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64 Citations (Scopus)

Abstract

We report the first synthesis of colloidal CuInTe 2 , CuInTe 2-x Se x gradient alloyed quantum dots (QDs) through a simple hot injection method. We confirmed the composition of synthesized QDs to cationic rich phase of CuIn 1.5 Te 2.5 and Cu 0.23 In 0.36 Te 0.19 Se 0.22 with XPS and ICP analysis, and we have also found that the gradient alloyed Cu 0.23 In 0.36 Te 0.19 Se 0.22 QDs exhibit greatly improved stability over the CuIn 1.5 Te 2.5 QDs. The solution-processed solar cell based on the gradient alloyed Cu 0.23 In 0.36 Te 0.19 Se 0.22 QDs exhibited 17.4 mA/cm 2 of short circuit current density (J sc ), 0.40 V of open circuit voltage (V oc ), 44.1% of fill factor (FF), and 3.1% of overall power conversion efficiency at 100 mW/cm 2 AM 1.5G illumination.

Original languageEnglish
Pages (from-to)4756-4763
Number of pages8
JournalACS Nano
Volume7
Issue number6
DOIs
Publication statusPublished - 2013 Jun 25
Externally publishedYes

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Keywords

  • CuInTe Se
  • CuInTe
  • gradient alloyed quantum dot
  • quantum dots
  • solar cell

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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