Synthesis of type II CdTe/CdSe heterostructure tetrapod nanocrystals for PV applications

H. Lee; S. W. Yoon; J. P. Ahn; Y. D. Suh; J. S. Lee; H. Lim; D. Kim

doi:10.1016/j.solmat.2008.09.050

Synthesis of type II CdTe/CdSe heterostructure tetrapod nanocrystals for PV applications

H. Lee, S. W. Yoon, J. P. Ahn, Y. D. Suh, J. S. Lee, H. Lim, D. Kim

Department of Materials Science and Engineering

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

35 Citations (Scopus)

Abstract

We report a facile one-pot synthetic method for the formation of CdTe/CdSe tetrapod nanocrystals with type II band alignment. The crystal growth kinetics can be controlled by changing the injection temperature, rate and concentration of the chalcogen precursor, allowing the structure of CdTe/CdSe tetrapod nanocrystals to be synthesized without changing the underlying chemistry. Only the multiple injection of Se precursor promotes epitaxial growth of a CdSe nanorod on the end of CdTe tetrapod arms. This synthesis shows that the mechanism of tetrapod nucleated growth may be generally applicable for creating other non-core/shell heterostructures. The heterostructure nanocrystals are composed of a CdTe tetrapod core and four CdSe nanorod tips, showing optical properties typical of type II heterostructures that are well suited for photovoltaic applications.

Original language	English
Pages (from-to)	779-782
Number of pages	4
Journal	Solar Energy Materials and Solar Cells
Volume	93
Issue number	6-7
DOIs	https://doi.org/10.1016/j.solmat.2008.09.050
Publication status	Published - 2009 Jun

Bibliographical note

Funding Information:
This work is the outcome of the fostering project of the Best Lab supported financially by the Ministry of Commerce, Industry and Energy (MOCIE).

Keywords

Band engineering
CdTe/CdSe
Indirect transition
Tetrapod nanocrystal
Type II heterojunction

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.solmat.2008.09.050

Cite this

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title = "Synthesis of type II CdTe/CdSe heterostructure tetrapod nanocrystals for PV applications",

abstract = "We report a facile one-pot synthetic method for the formation of CdTe/CdSe tetrapod nanocrystals with type II band alignment. The crystal growth kinetics can be controlled by changing the injection temperature, rate and concentration of the chalcogen precursor, allowing the structure of CdTe/CdSe tetrapod nanocrystals to be synthesized without changing the underlying chemistry. Only the multiple injection of Se precursor promotes epitaxial growth of a CdSe nanorod on the end of CdTe tetrapod arms. This synthesis shows that the mechanism of tetrapod nucleated growth may be generally applicable for creating other non-core/shell heterostructures. The heterostructure nanocrystals are composed of a CdTe tetrapod core and four CdSe nanorod tips, showing optical properties typical of type II heterostructures that are well suited for photovoltaic applications.",

keywords = "Band engineering, CdTe/CdSe, Indirect transition, Tetrapod nanocrystal, Type II heterojunction",

author = "H. Lee and Yoon, {S. W.} and Ahn, {J. P.} and Suh, {Y. D.} and Lee, {J. S.} and H. Lim and D. Kim",

note = "Funding Information: This work is the outcome of the fostering project of the Best Lab supported financially by the Ministry of Commerce, Industry and Energy (MOCIE).",

year = "2009",

month = jun,

doi = "10.1016/j.solmat.2008.09.050",

language = "English",

volume = "93",

pages = "779--782",

journal = "Solar Energy Materials and Solar Cells",

issn = "0927-0248",

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T1 - Synthesis of type II CdTe/CdSe heterostructure tetrapod nanocrystals for PV applications

AU - Lee, H.

AU - Yoon, S. W.

AU - Ahn, J. P.

AU - Suh, Y. D.

AU - Lee, J. S.

AU - Lim, H.

AU - Kim, D.

N1 - Funding Information: This work is the outcome of the fostering project of the Best Lab supported financially by the Ministry of Commerce, Industry and Energy (MOCIE).

PY - 2009/6

Y1 - 2009/6

N2 - We report a facile one-pot synthetic method for the formation of CdTe/CdSe tetrapod nanocrystals with type II band alignment. The crystal growth kinetics can be controlled by changing the injection temperature, rate and concentration of the chalcogen precursor, allowing the structure of CdTe/CdSe tetrapod nanocrystals to be synthesized without changing the underlying chemistry. Only the multiple injection of Se precursor promotes epitaxial growth of a CdSe nanorod on the end of CdTe tetrapod arms. This synthesis shows that the mechanism of tetrapod nucleated growth may be generally applicable for creating other non-core/shell heterostructures. The heterostructure nanocrystals are composed of a CdTe tetrapod core and four CdSe nanorod tips, showing optical properties typical of type II heterostructures that are well suited for photovoltaic applications.

AB - We report a facile one-pot synthetic method for the formation of CdTe/CdSe tetrapod nanocrystals with type II band alignment. The crystal growth kinetics can be controlled by changing the injection temperature, rate and concentration of the chalcogen precursor, allowing the structure of CdTe/CdSe tetrapod nanocrystals to be synthesized without changing the underlying chemistry. Only the multiple injection of Se precursor promotes epitaxial growth of a CdSe nanorod on the end of CdTe tetrapod arms. This synthesis shows that the mechanism of tetrapod nucleated growth may be generally applicable for creating other non-core/shell heterostructures. The heterostructure nanocrystals are composed of a CdTe tetrapod core and four CdSe nanorod tips, showing optical properties typical of type II heterostructures that are well suited for photovoltaic applications.

KW - Band engineering

KW - CdTe/CdSe

KW - Indirect transition

KW - Tetrapod nanocrystal

KW - Type II heterojunction

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U2 - 10.1016/j.solmat.2008.09.050

DO - 10.1016/j.solmat.2008.09.050

M3 - Article

AN - SCOPUS:67349121328

SN - 0927-0248

VL - 93

SP - 779

EP - 782

JO - Solar Energy Materials and Solar Cells

JF - Solar Energy Materials and Solar Cells

IS - 6-7

ER -

Synthesis of type II CdTe/CdSe heterostructure tetrapod nanocrystals for PV applications

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

Access to Document

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