4.8 Article

Fabrication of CuInTe2 and CuInTe2-xSex Ternary Gradient Quantum Dots and Their Application to Solar Cells

Journal

ACS NANO
Volume 7, Issue 6, Pages 4756-4763

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/nn401274e

Keywords

quantum dots; CuInTe2; CuInTe2-xSex; gradient alloyed quantum dot; solar cell

Funding

  1. KRICT program for Future Technology of the Korea Research Institute of Chemical Technology (KRICT)
  2. Priority Research Centers Program [2012-0006687]
  3. Industrial Core Technology Development Program
  4. Ministry of Knowledge Economy, Republic of Korea [10035274]
  5. Korea Evaluation Institute of Industrial Technology (KEIT) [10035274] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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We report the first synthesis of colloidal CuInTe2, CuInTe2-xSex gradient alloyed quantum dots (QDs) through a simple hot injection method. We confirmed the composition of synthesized QDs to cationic rich phase of CuIn1.5Te2.5 and Cu0.23In0.36Te0.19Se0.22 with XPS and ICP analysis, and we have also found that the gradient alloyed Cu0.23In0.36Te0.19Se0.22 QDs exhibit greatly improved stability over the CuIn1.5Te2.5 QDs. The solution-processed solar cell based on the gradient alloyed Cu0.23In0.36Te0.19Se0.22 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.

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