Research Article

TEMPERATURE DEPENDENT (83-483 K) RAMAN SPECTROSCOPY ANALYSIS OF CVD GROWN WS2 MONOLAYERS

Volume: 21 Number: 1 March 31, 2020
TR EN

TEMPERATURE DEPENDENT (83-483 K) RAMAN SPECTROSCOPY ANALYSIS OF CVD GROWN WS2 MONOLAYERS

Abstract

For novel materials to be used in practical applications, their temperature dependent behavior and limitations need to be understood thoroughly. For example, the mobility of charge carriers, one of the important performance parameters in transistors, strongly depend on the change in the ambient temperature. Hence, characterization of potential optoelectronic materials at extreme temperatures is critical for future applications. In this study, we report on the changes of Raman scattering spectra as the temperature is changed from 83 K to 483 K for the 2D transition metal dichalcogenide materials, namely WS2 monolayers formed by chemical vapor deposition technique (CVD). Our results show that both E′ (E12g) and A1(A1g) modes red shift linearly as the temperature increases. The first order thermal coefficients have been calculated with the Grüneisen model, which suggests that in-plane mode is affected more by the increased temperature than that of out of plane mode. This difference is attributed to the defects in the sample as the flakes are grown by the CVD method. We also investigated the temperature dependence of the second order, 2LA(M) (at 345.7 cm-1) which is one of the most intense peaks in the spectra.

Keywords

WS2,Raman Spectroscopy,Temperature Dependence

Supporting Institution

Eskişehir Teknik Üniversitesi, TÜBİTAK

Project Number

BAP 19ADP050, BAP 19ADP052, TUBITAK Project No: 116F445

Thanks

This work was supported by Eskişehir Technical University Research Project Numbers: BAP 19ADP050, BAP 19ADP052 and TUBITAK Project No: 116F445.

References

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APA
Oper, M., & Kosku Perkgöz, N. (2020). TEMPERATURE DEPENDENT (83-483 K) RAMAN SPECTROSCOPY ANALYSIS OF CVD GROWN WS2 MONOLAYERS. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering, 21(1), 155-164. https://doi.org/10.18038/estubtda.675907
AMA
1.Oper M, Kosku Perkgöz N. TEMPERATURE DEPENDENT (83-483 K) RAMAN SPECTROSCOPY ANALYSIS OF CVD GROWN WS2 MONOLAYERS. Estuscience - Se. 2020;21(1):155-164. doi:10.18038/estubtda.675907
Chicago
Oper, Merve, and Nihan Kosku Perkgöz. 2020. “TEMPERATURE DEPENDENT (83-483 K) RAMAN SPECTROSCOPY ANALYSIS OF CVD GROWN WS2 MONOLAYERS”. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering 21 (1): 155-64. https://doi.org/10.18038/estubtda.675907.
EndNote
Oper M, Kosku Perkgöz N (March 1, 2020) TEMPERATURE DEPENDENT (83-483 K) RAMAN SPECTROSCOPY ANALYSIS OF CVD GROWN WS2 MONOLAYERS. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering 21 1 155–164.
IEEE
[1]M. Oper and N. Kosku Perkgöz, “TEMPERATURE DEPENDENT (83-483 K) RAMAN SPECTROSCOPY ANALYSIS OF CVD GROWN WS2 MONOLAYERS”, Estuscience - Se, vol. 21, no. 1, pp. 155–164, Mar. 2020, doi: 10.18038/estubtda.675907.
ISNAD
Oper, Merve - Kosku Perkgöz, Nihan. “TEMPERATURE DEPENDENT (83-483 K) RAMAN SPECTROSCOPY ANALYSIS OF CVD GROWN WS2 MONOLAYERS”. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering 21/1 (March 1, 2020): 155-164. https://doi.org/10.18038/estubtda.675907.
JAMA
1.Oper M, Kosku Perkgöz N. TEMPERATURE DEPENDENT (83-483 K) RAMAN SPECTROSCOPY ANALYSIS OF CVD GROWN WS2 MONOLAYERS. Estuscience - Se. 2020;21:155–164.
MLA
Oper, Merve, and Nihan Kosku Perkgöz. “TEMPERATURE DEPENDENT (83-483 K) RAMAN SPECTROSCOPY ANALYSIS OF CVD GROWN WS2 MONOLAYERS”. Eskişehir Technical University Journal of Science and Technology A - Applied Sciences and Engineering, vol. 21, no. 1, Mar. 2020, pp. 155-64, doi:10.18038/estubtda.675907.
Vancouver
1.Merve Oper, Nihan Kosku Perkgöz. TEMPERATURE DEPENDENT (83-483 K) RAMAN SPECTROSCOPY ANALYSIS OF CVD GROWN WS2 MONOLAYERS. Estuscience - Se. 2020 Mar. 1;21(1):155-64. doi:10.18038/estubtda.675907