CuGaS                         2                         -CuInE                         2                          (E = S, Se) Colloidal Nanorod Heterostructures

Nuri Oh; Logan P. Keating; Gryphon A. Drake; Moonsub Shim

doi:10.1021/acs.chemmater.8b04769

CuGaS ₂ -CuInE ₂ (E = S, Se) Colloidal Nanorod Heterostructures

Nuri Oh, Logan P. Keating, Gryphon A. Drake, Moonsub Shim

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

Abstract

Colloidal nanorod heterostructures of I-III-VI ₂ semiconductors have been synthesized in a solution starting from wurtzite-like CuGaS ₂ nanorods. Growth of CuInS ₂ or CuInSe ₂ on CuGaS ₂ nanorods results in interesting sawtooth structures with larger lattice strain leading to sharper, more pronounced teeth. A final inorganic shell of ZnSe or ZnS grown on the CuGaS ₂ /CuInSe ₂ nanorod heterostructures enhances photoluminescence. Unusual brush-like structures arise with prolonged ZnSe growth. Time-resolved photoluminescence measurements on CuGaS ₂ /CuInSe ₂ /ZnS nanorod heterostructures reveal a lifetime approaching one microsecond, suggesting charge separation within the nanorods. The results shown here provide previously unknown nanorod heterostructures exhibiting interesting and potentially useful optical properties along with insights into heterostructure formation in colloidal I-III-VI ₂ nanorods.

Original language	English (US)
Pages (from-to)	1973-1980
Number of pages	8
Journal	Chemistry of Materials
Volume	31
Issue number	6
DOIs	https://doi.org/10.1021/acs.chemmater.8b04769
State	Published - Mar 26 2019
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
Materials Chemistry

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10.1021/acs.chemmater.8b04769

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CuGaS ₂ -CuInE ₂ (E = S, Se) Colloidal Nanorod Heterostructures . / Oh, Nuri; Keating, Logan P.; Drake, Gryphon A. et al.
In: Chemistry of Materials, Vol. 31, No. 6, 26.03.2019, p. 1973-1980.

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

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abstract = " Colloidal nanorod heterostructures of I-III-VI 2 semiconductors have been synthesized in a solution starting from wurtzite-like CuGaS 2 nanorods. Growth of CuInS 2 or CuInSe 2 on CuGaS 2 nanorods results in interesting sawtooth structures with larger lattice strain leading to sharper, more pronounced teeth. A final inorganic shell of ZnSe or ZnS grown on the CuGaS 2 /CuInSe 2 nanorod heterostructures enhances photoluminescence. Unusual brush-like structures arise with prolonged ZnSe growth. Time-resolved photoluminescence measurements on CuGaS 2 /CuInSe 2 /ZnS nanorod heterostructures reveal a lifetime approaching one microsecond, suggesting charge separation within the nanorods. The results shown here provide previously unknown nanorod heterostructures exhibiting interesting and potentially useful optical properties along with insights into heterostructure formation in colloidal I-III-VI 2 nanorods.",

author = "Nuri Oh and Keating, {Logan P.} and Drake, {Gryphon A.} and Moonsub Shim",

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N2 - Colloidal nanorod heterostructures of I-III-VI 2 semiconductors have been synthesized in a solution starting from wurtzite-like CuGaS 2 nanorods. Growth of CuInS 2 or CuInSe 2 on CuGaS 2 nanorods results in interesting sawtooth structures with larger lattice strain leading to sharper, more pronounced teeth. A final inorganic shell of ZnSe or ZnS grown on the CuGaS 2 /CuInSe 2 nanorod heterostructures enhances photoluminescence. Unusual brush-like structures arise with prolonged ZnSe growth. Time-resolved photoluminescence measurements on CuGaS 2 /CuInSe 2 /ZnS nanorod heterostructures reveal a lifetime approaching one microsecond, suggesting charge separation within the nanorods. The results shown here provide previously unknown nanorod heterostructures exhibiting interesting and potentially useful optical properties along with insights into heterostructure formation in colloidal I-III-VI 2 nanorods.

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