Fabrication of CuInTe2 and CuInTe2-xSe xternary 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

doi:10.1021/nn401274e

Fabrication of CuInTe₂ and CuInTe_2-xSe _xternary 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

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

81 Citations (Scopus)

Abstract

We report the first synthesis of colloidal CuInTe₂, CuInTe _2-xSe_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_1.5Te_2.5 and Cu _0.23In_0.36Te_0.19Se_0.22 with XPS and ICP analysis, and we have also found that the gradient alloyed Cu _0.23In_0.36Te_0.19Se_0.22 QDs exhibit greatly improved stability over the CuIn_1.5Te_2.5 QDs. The solution-processed solar cell based on the gradient alloyed Cu _0.23In_0.36Te_0.19Se_0.22 QDs exhibited 17.4 mA/cm² 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/cm² AM 1.5G illumination.

Original language	English
Pages (from-to)	4756-4763
Number of pages	8
Journal	ACS nano
Volume	7
Issue number	6
DOIs	https://doi.org/10.1021/nn401274e
Publication status	Published - 2013 Jun 25
Externally published	Yes

Keywords

CuInTe
CuInTeSe
gradient alloyed quantum dot
quantum dots
solar cell

ASJC Scopus subject areas

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

Access to Document

10.1021/nn401274e

Cite this

@article{99bccc5827d2416f8811e8942fac326b,

title = "Fabrication of CuInTe2 and CuInTe2-xSe xternary gradient quantum dots and their application to solar cells",

abstract = "We report the first synthesis of colloidal CuInTe2, CuInTe 2-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 Cu 0.23In0.36Te0.19Se0.22 with XPS and ICP analysis, and we have also found that the gradient alloyed Cu 0.23In0.36Te0.19Se0.22 QDs exhibit greatly improved stability over the CuIn1.5Te2.5 QDs. The solution-processed solar cell based on the gradient alloyed Cu 0.23In0.36Te0.19Se0.22 QDs exhibited 17.4 mA/cm2 of short circuit current density (Jsc), 0.40 V of open circuit voltage (Voc), 44.1% of fill factor (FF), and 3.1% of overall power conversion efficiency at 100 mW/cm2 AM 1.5G illumination.",

keywords = "CuInTe, CuInTeSe, gradient alloyed quantum dot, quantum dots, solar cell",

author = "Sungwoo Kim and Meejae Kang and Seajin Kim and Heo, {Jin Hyuk} and Noh, {Jun Hong} and Im, {Sang Hyuk} and Seok, {Sang Il} and Kim, {Sang Wook}",

year = "2013",

month = jun,

day = "25",

doi = "10.1021/nn401274e",

language = "English",

volume = "7",

pages = "4756--4763",

journal = "ACS Nano",

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publisher = "American Chemical Society",

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T1 - Fabrication of CuInTe2 and CuInTe2-xSe xternary gradient quantum dots and their application to solar cells

AU - Kim, Sungwoo

AU - Kang, Meejae

AU - Kim, Seajin

AU - Heo, Jin Hyuk

AU - Noh, Jun Hong

AU - Im, Sang Hyuk

AU - Seok, Sang Il

AU - Kim, Sang Wook

PY - 2013/6/25

Y1 - 2013/6/25

N2 - We report the first synthesis of colloidal CuInTe2, CuInTe 2-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 Cu 0.23In0.36Te0.19Se0.22 with XPS and ICP analysis, and we have also found that the gradient alloyed Cu 0.23In0.36Te0.19Se0.22 QDs exhibit greatly improved stability over the CuIn1.5Te2.5 QDs. The solution-processed solar cell based on the gradient alloyed Cu 0.23In0.36Te0.19Se0.22 QDs exhibited 17.4 mA/cm2 of short circuit current density (Jsc), 0.40 V of open circuit voltage (Voc), 44.1% of fill factor (FF), and 3.1% of overall power conversion efficiency at 100 mW/cm2 AM 1.5G illumination.

AB - We report the first synthesis of colloidal CuInTe2, CuInTe 2-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 Cu 0.23In0.36Te0.19Se0.22 with XPS and ICP analysis, and we have also found that the gradient alloyed Cu 0.23In0.36Te0.19Se0.22 QDs exhibit greatly improved stability over the CuIn1.5Te2.5 QDs. The solution-processed solar cell based on the gradient alloyed Cu 0.23In0.36Te0.19Se0.22 QDs exhibited 17.4 mA/cm2 of short circuit current density (Jsc), 0.40 V of open circuit voltage (Voc), 44.1% of fill factor (FF), and 3.1% of overall power conversion efficiency at 100 mW/cm2 AM 1.5G illumination.

KW - CuInTe

KW - CuInTeSe

KW - gradient alloyed quantum dot

KW - quantum dots

KW - solar cell

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