Temperature effects on optical characteristics of CdSe thin films

Date

2021-03-01

Author

Gullu, H. H.
Isik, M.
Surucu, O.
Hasanlı, Nızamı
Parlak, Mehmet

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

313
views

0
downloads

CdSe is one of the significant members of II-VI type semiconducting family and it has a wide range of technological applications in which optoelectronic devices take a special position. The present paper reports the structural and optical characteristics of thermally evaporated CdSe thin films. XRD pattern exhibited preferential orientation along (111) plane while atomic composition analyses resulted in the ratio of Cd/Se as closer to 1.0. Temperature-dependent band gap characteristics of CdSe thin films were investigated for the first time by carrying out transmission experiments in the 10-300 K range. The analyses showed that direct band gap energy of the compound decreases from 1.750 (at 10 K) to 1.705 eV (at 300 K). Varshni model was successfully applied to the temperature-band gap energy dependency and various optical constants were determined. Raman spectrum of CdSe thin films was also presented to understand the vibrational characteristics of the compound. The present paper would provide worthwhile data to researchers especially studying on optoelectronic device applications of CdSe thin films.

Subject Keywords

Mechanical Engineering, General Materials Science, Mechanics of Materials, Condensed Matter Physics

URI

https://hdl.handle.net/11511/88550

Journal

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING

DOI

https://doi.org/10.1016/j.mssp.2020.105559

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Temperature-tuned band gap characteristics of InSe layered semiconductor single crystals Isik, M.; Hasanlı, Nızamı (Elsevier BV, 2020-03-01) Layered structured InSe has attracted remarkable attention due to its effective characteristics utilized especially in optoelectronic device technology. This point directs researchers to investigate optical properties of InSe in great detail. The temperature dependent band gap characteristics of InSe and analyses performed on this dependency have been rarely studied in literature. Here, temperature-dependent transmission and room temperature reflection experiments were performed on InSe layered single cryst...
Temperature-tuned band gap properties of MoS2 thin films Surucu, O.; Isik, M.; Hasanlı, Nızamı; Terlemezoğlu, Makbule; Parlak, Mehmet (Elsevier BV, 2020-09-15) MoS2 is one of the fascinating members of transition metal dichalcogenides and has attracted great attention due to its various optoelectronic device applications and its characteristic as two-dimensional material. The present paper reports the structural and temperature tuned optical properties of MoS2 thin films grown by RF magnetron sputtering technique. It was observed that the atomic composition ratio of Mo:S was nearly equal to 1:2 and the deposited thin films have hexagonal crystalline structure exhi...
Temperature-dependent Raman scattering spectra of epsilon-GaSe layered crystal Hasanlı, Nızamı; Ozkan, H; Kocabas, C (Elsevier BV, 2002-01-01) The temperature dependencies (15-300 K) of seven Raman-active mode frequencies and linewidths in layered gallium selenide have been measured in the frequency range from 10 to 320 cm(-1). We observed softening and broadening of the optical phonon lines with increasing temperature. Comparison between the experimental data and theories of the shift and broadening of the intralayer phonon lines during heating of the crystal showed that the experimental dependencies can be explained by the contributions from the...
Electromagnetic simulations of polarization-insensitive and wide-angle multiband metamaterial absorber by incorporating double asterisk resonator Abdulkarim, Yadgar; Deng Lianwen, Deng Lianwen; Luo Heng, Luo Heng; Huang Shengxiang, Huang Shengxiang; He Longhui, He Longhui; Li Yuhan, Li Yuhan; Muhammadsharif, Fahmi F.; ALTINTAŞ, OLCAY; Sabah, Cumali; KARAASLAN, MUHARREM (Springer Science and Business Media LLC, 2020-04-25) A novel multiband metamaterial absorber (MTMA) is proposed which is capable of well presenting a polarization-insensitive and wide incident angle stability in the microwave frequency range. The proposed MTMA comprising two vertically stacked asterisk-based copper resonators separated by dielectric layer of flame retardant type four and backed with a thin copper film. High-frequency structure simulator was used to simulate the absorber and to depict surface current distribution. The results showed that the a...
Structural, Electronic and Magnetic Properties of BN Nanotubes Doped with Mn and Cr: Exploring the Potential for Device Technology Kökten, Hatice; ERKOÇ, ŞAKİR (American Scientific Publishers, 2009-04-01) Spintronics has become an increasingly important topic in device applications in the nanoscale. Several candidate systems have been studied both experimentally and theoretically in literature. In this work, we investigate the potential of Mn- and Cr-doped BN nanotubes as nanoscale devices in spintronics and magnetic applications using density functional theory. Our calculations indicate that Mn- and Cr-doped (8, 0) BN nanotubes display large magnetic moments (up to 4 mu(B)) and offer possibilities for spin-...

Citation Formats

H. H. Gullu, M. Isik, O. Surucu, N. Hasanlı, and M. Parlak, “Temperature effects on optical characteristics of CdSe thin films,” MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/88550.