Structure and Properties of ZnSxSe1-x Thin Films Deposited by Thermal Evaporation of ZnS and ZnSe Powder Mixtures | Sciact - CRIS-system of Boreskov Institute of Catalysis

Structure and Properties of ZnSxSe1-x Thin Films Deposited by Thermal Evaporation of ZnS and ZnSe Powder Mixtures Full article

Journal

Materials Research Express
, E-ISSN: 2053-1591

Output data

Year: 2015, Volume: 2, Number: 2, Article number : 025006, Pages count : 9 DOI: 10.1088/2053-1591/2/2/025006

Tags

Band gap; EXAFS spectroscopy; Raman spectroscopy; Thermal evaporation of ZnS and ZnSe powders mixture; Thin films of ZnSxSe1-x compounds; X-ray diffraction

Authors

Valeev R G ¹ , Romanov E A ² , Vorobiev V L ¹ , Mukhgalin V V ¹ , Kriventsov V V ³ , Chukavin A I ¹ , Robouch B. ⁴

Affiliations

1	Physical-Technical Institute of Ural Brunch of RAS, Kirova str. 132, Izhevsk 426000, Russia
2	Udmurt State University, Universitetskaya str. 1, Izhevsk 426034, Russia
3	Boreskov’s Institute of Catalysis of Siberian Brunch of RAS, Lavrentieva 5, Novosibirsk 630090, Russia
4	Istituto Nazionale di Fisica Nucleare-Laboratori Nazionali di Frascati, Via E. Fermi 40, I-00044 Frascati, Italy

Funding (4)

1	Президиум РАН	24
2	Ural Branch of the Russian Academy of Sciences	12-П-2-1038
3	Ural Branch of the Russian Academy of Sciences	12-С-2-1024
4	Russian Foundation for Basic Research	12-03-01039 (01201258422)

Interest to ZnS x Se 1−x alloys is due to their band-gap tunability varying S and Se content. Films of ZnS x Se 1−x were grown evaporating ZnS and ZnSe powder mixtures onto SiO 2 , NaCl, Si and ITO sub-strates using an original low-cost method. X-ray diffraction patterns and Raman spectroscopy, show that the lattice structure of these films is cubic ZnSe-like, as S atoms replace Se and film compositions have their initial S/Se ratio. Optical absorption spectra show that band gap values increase from 2.25 to 3 eV as x increases, in agreement with the literature. Because S atomic radii are smaller than Se, EXAFS spectra confirm that bond distances and Se coordination numbers decrease as the Se content decrea-ses. The strong deviation from linearity of ZnSe coordination numbers in the ZnS x Se 1−x indicate that within this ordered crystal structure strong site occupation preferences occur in the distribution of Se and S ions. The behavior is quantitatively confirmed by the strong deviation from the random Ber-noulli distribution of the three sight occupation preference coefficients of the strained tetrahedron model. Actually, the ternary ZnS x Se 1−x system is a bi-binary (ZnS+ZnSe) alloy with evanescent forma-tion of ternary configurations throughout the x-range

Valeev R.G. , Romanov E.A. , Vorobiev V.L. , Mukhgalin V.V. , Kriventsov V.V. , Chukavin A.I. , Robouch B.
Structure and Properties of ZnSxSe1-x Thin Films Deposited by Thermal Evaporation of ZnS and ZnSe Powder Mixtures
Materials Research Express. 2015. V.2. N2. 025006 :1-9. DOI: 10.1088/2053-1591/2/2/025006 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Jun 3, 2014
Accepted:	Dec 22, 2014
Published online:	Jan 26, 2015
Published print:	Feb 1, 2015

Web of science:	WOS:000369987600006
Scopus:	2-s2.0-84953390198
Elibrary:	26879676
Chemical Abstracts:	2015:311146
OpenAlex:	W2011080442

DB	Citing
Web of science	15
Scopus	15
OpenAlex	15