Colloidal Cu-Zn-Sn-Te Nanocrystals: Aqueous Synthesis and Raman Spectroscopy Study

Cu-Zn-Sn-Te (CZTTe) is an inexpensive quaternary semiconductor that has not been investigated so far, unlike its intensively studied CZTS and CZTSe counterparts, although it may potentially have desirable properties for solar energy conversion, thermoelectric, and other applications. Here, we report...

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Autores principales:	Volodymyr Dzhagan, Olga Kapush, Nazar Mazur, Yevhenii Havryliuk, Mykola I. Danylenko, Serhiy Budzulyak, Volodymyr Yukhymchuk, Mykhailo Valakh, Alexander P. Litvinchuk, Dietrich R. T. Zahn
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	colloidal nanocrystals Raman spectroscopy phonons Cu<sub>2</sub>ZnSnTe<sub>4</sub> infrared absorber Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/2c6f8ff9fefd4dbb8cc736c25aefa1e9
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spelling	oai:doaj.org-article:2c6f8ff9fefd4dbb8cc736c25aefa1e92021-11-25T18:30:53ZColloidal Cu-Zn-Sn-Te Nanocrystals: Aqueous Synthesis and Raman Spectroscopy Study10.3390/nano111129232079-4991https://doaj.org/article/2c6f8ff9fefd4dbb8cc736c25aefa1e92021-10-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2923https://doaj.org/toc/2079-4991Cu-Zn-Sn-Te (CZTTe) is an inexpensive quaternary semiconductor that has not been investigated so far, unlike its intensively studied CZTS and CZTSe counterparts, although it may potentially have desirable properties for solar energy conversion, thermoelectric, and other applications. Here, we report on the synthesis of CZTTe nanocrystals (NCs) via an original low-cost, low-temperature colloidal synthesis in water, using a small-molecule stabilizer, thioglycolic acid. The absorption edge at about 0.8–0.9 eV agrees well with the value expected for Cu<sub>2</sub>ZnSnTe<sub>4</sub>, thus suggesting CZTTe to be an affordable alternative for IR photodetectors and solar cells. As the main method of structural characterization multi-wavelength resonant Raman spectroscopy was used complemented by TEM, XRD, XPS as well as UV-vis and IR absorption spectroscopy. The experimental study is supported by first principles density functional calculations of the electronic structure and phonon spectra. Even though the composition of NCs exhibits a noticeable deviation from the Cu<sub>2</sub>ZnSnTe<sub>4</sub> stoichiometry, a common feature of multinary NCs synthesized in water, the Raman spectra reveal very small widths of the main phonon peak and also multi-phonon scattering processes up to the fourth order. These factors imply a very good crystallinity of the NCs, which is further confirmed by high-resolution TEM.Volodymyr DzhaganOlga KapushNazar MazurYevhenii HavryliukMykola I. DanylenkoSerhiy BudzulyakVolodymyr YukhymchukMykhailo ValakhAlexander P. LitvinchukDietrich R. T. ZahnMDPI AGarticlecolloidal nanocrystalsRaman spectroscopyphononsCu<sub>2</sub>ZnSnTe<sub>4</sub>infrared absorberChemistryQD1-999ENNanomaterials, Vol 11, Iss 2923, p 2923 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	colloidal nanocrystals Raman spectroscopy phonons Cu<sub>2</sub>ZnSnTe<sub>4</sub> infrared absorber Chemistry QD1-999
spellingShingle	colloidal nanocrystals Raman spectroscopy phonons Cu<sub>2</sub>ZnSnTe<sub>4</sub> infrared absorber Chemistry QD1-999 Volodymyr Dzhagan Olga Kapush Nazar Mazur Yevhenii Havryliuk Mykola I. Danylenko Serhiy Budzulyak Volodymyr Yukhymchuk Mykhailo Valakh Alexander P. Litvinchuk Dietrich R. T. Zahn Colloidal Cu-Zn-Sn-Te Nanocrystals: Aqueous Synthesis and Raman Spectroscopy Study
description	Cu-Zn-Sn-Te (CZTTe) is an inexpensive quaternary semiconductor that has not been investigated so far, unlike its intensively studied CZTS and CZTSe counterparts, although it may potentially have desirable properties for solar energy conversion, thermoelectric, and other applications. Here, we report on the synthesis of CZTTe nanocrystals (NCs) via an original low-cost, low-temperature colloidal synthesis in water, using a small-molecule stabilizer, thioglycolic acid. The absorption edge at about 0.8–0.9 eV agrees well with the value expected for Cu<sub>2</sub>ZnSnTe<sub>4</sub>, thus suggesting CZTTe to be an affordable alternative for IR photodetectors and solar cells. As the main method of structural characterization multi-wavelength resonant Raman spectroscopy was used complemented by TEM, XRD, XPS as well as UV-vis and IR absorption spectroscopy. The experimental study is supported by first principles density functional calculations of the electronic structure and phonon spectra. Even though the composition of NCs exhibits a noticeable deviation from the Cu<sub>2</sub>ZnSnTe<sub>4</sub> stoichiometry, a common feature of multinary NCs synthesized in water, the Raman spectra reveal very small widths of the main phonon peak and also multi-phonon scattering processes up to the fourth order. These factors imply a very good crystallinity of the NCs, which is further confirmed by high-resolution TEM.
format	article
author	Volodymyr Dzhagan Olga Kapush Nazar Mazur Yevhenii Havryliuk Mykola I. Danylenko Serhiy Budzulyak Volodymyr Yukhymchuk Mykhailo Valakh Alexander P. Litvinchuk Dietrich R. T. Zahn
author_facet	Volodymyr Dzhagan Olga Kapush Nazar Mazur Yevhenii Havryliuk Mykola I. Danylenko Serhiy Budzulyak Volodymyr Yukhymchuk Mykhailo Valakh Alexander P. Litvinchuk Dietrich R. T. Zahn
author_sort	Volodymyr Dzhagan
title	Colloidal Cu-Zn-Sn-Te Nanocrystals: Aqueous Synthesis and Raman Spectroscopy Study
title_short	Colloidal Cu-Zn-Sn-Te Nanocrystals: Aqueous Synthesis and Raman Spectroscopy Study
title_full	Colloidal Cu-Zn-Sn-Te Nanocrystals: Aqueous Synthesis and Raman Spectroscopy Study
title_fullStr	Colloidal Cu-Zn-Sn-Te Nanocrystals: Aqueous Synthesis and Raman Spectroscopy Study
title_full_unstemmed	Colloidal Cu-Zn-Sn-Te Nanocrystals: Aqueous Synthesis and Raman Spectroscopy Study
title_sort	colloidal cu-zn-sn-te nanocrystals: aqueous synthesis and raman spectroscopy study
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/2c6f8ff9fefd4dbb8cc736c25aefa1e9
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Colloidal Cu-Zn-Sn-Te Nanocrystals: Aqueous Synthesis and Raman Spectroscopy Study

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