CuInS2 quantum dots synthesized by a solvothermal route and their application as effective electron acceptors for hybrid solar cells

Wenjin Yue, Shikui Han, Ruixiang Peng, Wei Shen, Hongwei Geng, Fan Wu, Shanwen Tao, Mingtai Wang

Research output: Contribution to journalArticle

149 Citations (Scopus)

Abstract

This paper describes a solvothermal approach to synthesize CuInS2 quantum dots (QDs) and demonstrates their application as a potential electron accepting material for polymer-based hybrid solar cells, for the first time. The CuInS2 QDs with a size of 2-4 nm are synthesized by the solvothermal method with 4-bromothiophenol (HSPh) as both reduction and capping agents, and characterized by XRD, XPS, TEM, FT-IR, cyclic voltammetry (CV), and absorption and photoluminescence spectra. Results reveal that the CuInS2 QDs result from the solvothermal decomposition of a soluble organic sodium salt as an intermediate precursor formed by simple reactions among CuCl2, InCl3, HSPh and Na2S at room temperature; they have an ionization potential (IP) of -5.8 eV and an electron affinity (EA) of -4.0 eV and can quench effectively the luminescence of poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene) (MEH-PPV). Due to the favorable IP and EA positions with respect to MEH-PPV, the CuInS2 QDs act as an effective electron acceptor for the hybrid solar cells based on MEH-PPV/CuInS2-QDs blends with a wide spectral response extending from 300 to 900 nm, by allowing the efficient charge separation for neutral excited states produced either on the polymer or on the QDs. The MEH-PPV/CuInS2-QDs solar cells exhibit a promising open circuit voltage (V-oc) of 0.62 V under the monochromic illumination of 15.85 mW cm(-2) at 470 nm. The charge transfer processes in the solar cells are also described.

LanguageEnglish
Pages7570-7578
Number of pages9
JournalJournal of Materials Chemistry
Volume20
Issue number35
Early online date2 Aug 2010
DOIs
Publication statusPublished - 2010

Fingerprint

Semiconductor quantum dots
Solar cells
Electrons
Electron affinity
Ionization potential
Polymers
Open circuit voltage
Excited states
Cyclic voltammetry
Charge transfer
Luminescence
Photoluminescence
X ray photoelectron spectroscopy
Salts
Lighting
Sodium
Transmission electron microscopy
Decomposition
poly(2-methoxy-5-(2'-ethylhexyloxy)-p-phenylenevinylene)

Keywords

  • polymer photovoltaic cells
  • single-source precursors
  • semiconductor nanocystals
  • conjugated polymers
  • energy transfer
  • PPV derivatives
  • nanoparicles
  • polythiophene
  • devices
  • composites

Cite this

Yue, Wenjin ; Han, Shikui ; Peng, Ruixiang ; Shen, Wei ; Geng, Hongwei ; Wu, Fan ; Tao, Shanwen ; Wang, Mingtai. / CuInS2 quantum dots synthesized by a solvothermal route and their application as effective electron acceptors for hybrid solar cells. In: Journal of Materials Chemistry. 2010 ; Vol. 20, No. 35. pp. 7570-7578.
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abstract = "This paper describes a solvothermal approach to synthesize CuInS2 quantum dots (QDs) and demonstrates their application as a potential electron accepting material for polymer-based hybrid solar cells, for the first time. The CuInS2 QDs with a size of 2-4 nm are synthesized by the solvothermal method with 4-bromothiophenol (HSPh) as both reduction and capping agents, and characterized by XRD, XPS, TEM, FT-IR, cyclic voltammetry (CV), and absorption and photoluminescence spectra. Results reveal that the CuInS2 QDs result from the solvothermal decomposition of a soluble organic sodium salt as an intermediate precursor formed by simple reactions among CuCl2, InCl3, HSPh and Na2S at room temperature; they have an ionization potential (IP) of -5.8 eV and an electron affinity (EA) of -4.0 eV and can quench effectively the luminescence of poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene) (MEH-PPV). Due to the favorable IP and EA positions with respect to MEH-PPV, the CuInS2 QDs act as an effective electron acceptor for the hybrid solar cells based on MEH-PPV/CuInS2-QDs blends with a wide spectral response extending from 300 to 900 nm, by allowing the efficient charge separation for neutral excited states produced either on the polymer or on the QDs. The MEH-PPV/CuInS2-QDs solar cells exhibit a promising open circuit voltage (V-oc) of 0.62 V under the monochromic illumination of 15.85 mW cm(-2) at 470 nm. The charge transfer processes in the solar cells are also described.",
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author = "Wenjin Yue and Shikui Han and Ruixiang Peng and Wei Shen and Hongwei Geng and Fan Wu and Shanwen Tao and Mingtai Wang",
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CuInS2 quantum dots synthesized by a solvothermal route and their application as effective electron acceptors for hybrid solar cells. / Yue, Wenjin; Han, Shikui; Peng, Ruixiang; Shen, Wei; Geng, Hongwei; Wu, Fan; Tao, Shanwen; Wang, Mingtai.

In: Journal of Materials Chemistry, Vol. 20, No. 35, 2010, p. 7570-7578.

Research output: Contribution to journalArticle

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T1 - CuInS2 quantum dots synthesized by a solvothermal route and their application as effective electron acceptors for hybrid solar cells

AU - Yue, Wenjin

AU - Han, Shikui

AU - Peng, Ruixiang

AU - Shen, Wei

AU - Geng, Hongwei

AU - Wu, Fan

AU - Tao, Shanwen

AU - Wang, Mingtai

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N2 - This paper describes a solvothermal approach to synthesize CuInS2 quantum dots (QDs) and demonstrates their application as a potential electron accepting material for polymer-based hybrid solar cells, for the first time. The CuInS2 QDs with a size of 2-4 nm are synthesized by the solvothermal method with 4-bromothiophenol (HSPh) as both reduction and capping agents, and characterized by XRD, XPS, TEM, FT-IR, cyclic voltammetry (CV), and absorption and photoluminescence spectra. Results reveal that the CuInS2 QDs result from the solvothermal decomposition of a soluble organic sodium salt as an intermediate precursor formed by simple reactions among CuCl2, InCl3, HSPh and Na2S at room temperature; they have an ionization potential (IP) of -5.8 eV and an electron affinity (EA) of -4.0 eV and can quench effectively the luminescence of poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene) (MEH-PPV). Due to the favorable IP and EA positions with respect to MEH-PPV, the CuInS2 QDs act as an effective electron acceptor for the hybrid solar cells based on MEH-PPV/CuInS2-QDs blends with a wide spectral response extending from 300 to 900 nm, by allowing the efficient charge separation for neutral excited states produced either on the polymer or on the QDs. The MEH-PPV/CuInS2-QDs solar cells exhibit a promising open circuit voltage (V-oc) of 0.62 V under the monochromic illumination of 15.85 mW cm(-2) at 470 nm. The charge transfer processes in the solar cells are also described.

AB - This paper describes a solvothermal approach to synthesize CuInS2 quantum dots (QDs) and demonstrates their application as a potential electron accepting material for polymer-based hybrid solar cells, for the first time. The CuInS2 QDs with a size of 2-4 nm are synthesized by the solvothermal method with 4-bromothiophenol (HSPh) as both reduction and capping agents, and characterized by XRD, XPS, TEM, FT-IR, cyclic voltammetry (CV), and absorption and photoluminescence spectra. Results reveal that the CuInS2 QDs result from the solvothermal decomposition of a soluble organic sodium salt as an intermediate precursor formed by simple reactions among CuCl2, InCl3, HSPh and Na2S at room temperature; they have an ionization potential (IP) of -5.8 eV and an electron affinity (EA) of -4.0 eV and can quench effectively the luminescence of poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene) (MEH-PPV). Due to the favorable IP and EA positions with respect to MEH-PPV, the CuInS2 QDs act as an effective electron acceptor for the hybrid solar cells based on MEH-PPV/CuInS2-QDs blends with a wide spectral response extending from 300 to 900 nm, by allowing the efficient charge separation for neutral excited states produced either on the polymer or on the QDs. The MEH-PPV/CuInS2-QDs solar cells exhibit a promising open circuit voltage (V-oc) of 0.62 V under the monochromic illumination of 15.85 mW cm(-2) at 470 nm. The charge transfer processes in the solar cells are also described.

KW - polymer photovoltaic cells

KW - single-source precursors

KW - semiconductor nanocystals

KW - conjugated polymers

KW - energy transfer

KW - PPV derivatives

KW - nanoparicles

KW - polythiophene

KW - devices

KW - composites

U2 - 10.1039/c0jm00611d

DO - 10.1039/c0jm00611d

M3 - Article

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SP - 7570

EP - 7578

JO - Journal of Materials Chemistry

T2 - Journal of Materials Chemistry

JF - Journal of Materials Chemistry

SN - 0959-9428

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ER -