Optical characterization of Mo1−xWxS2 single crystals

DUMCENCO, Dumitru; HUANG, Ying-Sheng; HO, Ching-Hwa; COLEV, Andrei; GHERMAN, Cornel; KULYUK, Leonid; TIONG, Kwong-Kaw

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dc.contributor.author	DUMCENCO, Dumitru
dc.contributor.author	HUANG, Ying-Sheng
dc.contributor.author	HO, Ching-Hwa
dc.contributor.author	COLEV, Andrei
dc.contributor.author	GHERMAN, Cornel
dc.contributor.author	KULYUK, Leonid
dc.contributor.author	TIONG, Kwong-Kaw
dc.date.accessioned	2024-01-05T09:43:22Z
dc.date.available	2024-01-05T09:43:22Z
dc.date.issued	2009
dc.identifier.citation	DUMCENCO, Dumitru et al. Optical characterization of Mo1−xWxS2 single crystals. In: Microelectronics and Computer Science: proc. 6th International Conference, 1-3 Oct. 2009, Chişinău, Republica Moldova, vol. 1, 2009, pp. 73-75. ISBN 978-9975-45-045-4. ISBN 978-9975-45-122-2 (vol. 1).	en_US
dc.identifier.isbn	978-9975-45-045-4
dc.identifier.isbn	978-9975-45-122-2
dc.identifier.uri	http://repository.utm.md/handle/5014/25723
dc.description.abstract	A systematic optical study of Mo1-xWxS2 single crystals grown by the chemical vapor transport method in a wide range composition (0 ≤ x ≤ 1) is presented. The optical characterization was carried out using piezoreflectance (PzR) and photoluminescence (PL) measurements at room temperature. The origin and composition x dependence of A and B excitons are evaluated from PzR, indicating that the nature of the direct band edges is similar to the Mo1-xWxS2 compounds. Radiative recombination processes near indirect band gap in Mo1-xWxS2 single crystals are investigated by PL. The strong sharp lines attributed to recombination of excitons bound on electron-attractive neutral centers are observed in PL of 2H-MoS2 and 2H-WS2 but they are not visible in PL spectra of Mo1-xWxS2 single crystals. The broad-bands emission observed in PL spectra of Mo1-xWxS2 compounds are ascribed to recombination via deep centers due to the intrinsic defects of the layered crystals.	en_US
dc.language.iso	en	en_US
dc.publisher	Technical University of Moldova	en_US
dc.relation.ispartof	Proceeding of the 6th International Conference on "Microelectronics and Computer Science", oct.1-3, 2009, Chişinău, Moldova
dc.rights	Attribution-NonCommercial-NoDerivs 3.0 United States	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.subject	excitons	en_US
dc.subject	layered crystals	en_US
dc.subject	photoluminescence	en_US
dc.subject	piezoreflectance	en_US
dc.title	Optical characterization of Mo1−xWxS2 single crystals	en_US
dc.type	Article	en_US