Electronic transition responsible for size-dependent photoluminescence of colloidal CuInS2 quantum dots

Takahisa Omata; Katsuhiro Nose; Kohta Kurimoto; Masao Kita

doi:10.1039/c4tc01144a

Electronic transition responsible for size-dependent photoluminescence of colloidal CuInS₂ quantum dots

Takahisa Omata, Katsuhiro Nose, Kohta Kurimoto, Masao Kita

Research output: Contribution to journal › Article › peer-review

56 Citations (Scopus)

Abstract

Colloidal CuInS₂ quantum dots with an average size of 2.9-4.1 nm were synthesized by the one-pot heating of an organometallic solution. The size-dependent optical gaps and photoluminescence (PL) emission energies were analyzed based on the finite-depth well effective mass approximation. The PL emission was attributed to the recombination of electrons in the donor level and holes in the quantized hole state. Indium atom defects at copper sites or sulfur vacancies were proposed to be the defects acting as donors at ∼0.1 eV below the conduction band. This journal is

Original language	English
Pages (from-to)	6867-6872
Number of pages	6
Journal	Journal of Materials Chemistry C
Volume	2
Issue number	33
DOIs	https://doi.org/10.1039/c4tc01144a
Publication status	Published - 2014 Sep 7
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Materials Chemistry

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10.1039/c4tc01144a

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AU - Omata, Takahisa

AU - Nose, Katsuhiro

AU - Kurimoto, Kohta

AU - Kita, Masao

PY - 2014/9/7

Y1 - 2014/9/7

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AB - Colloidal CuInS2 quantum dots with an average size of 2.9-4.1 nm were synthesized by the one-pot heating of an organometallic solution. The size-dependent optical gaps and photoluminescence (PL) emission energies were analyzed based on the finite-depth well effective mass approximation. The PL emission was attributed to the recombination of electrons in the donor level and holes in the quantized hole state. Indium atom defects at copper sites or sulfur vacancies were proposed to be the defects acting as donors at ∼0.1 eV below the conduction band. This journal is

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Electronic transition responsible for size-dependent photoluminescence of colloidal CuInS₂ quantum dots

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