Investigation of photoluminescence emission from ?-Ga2O3: Ce thin films deposited by spray pyrolysis technique

Title

Investigation of photoluminescence emission from ?-Ga2O3: Ce thin films deposited by spray pyrolysis technique

Creator

Raphael R.; Anila E.I.

Description

Ce doped Ga2O3 thin films for different doping concentrations (3 at%, 4 at%, 5 at%, 6 at%, 7 at%, and 8 at%) were deposited by spray pyrolysis method. X-ray diffraction analysis confirmed the crystalline structure as that of monoclinic ?-Ga2O3. The effect of doping on the band gap of the material was studied by UV-Visible spectroscopic method and the thickness of the film and refractive index were measured by ellipsometric technique. The photoluminescence excitation and emission spectra were recorded for pure and doped samples and the energy band scheme with possible radiative and nonradiative transitions were elucidated. Concentration quenching effect was observed, and the underlying mechanism responsible for quenching effect was studied based on Dexter theory. 2021 Elsevier B.V.

Source

Journal of Alloys and Compounds, Vol-872

Date

2021-01-01

Publisher

Elsevier Ltd

Subject

Amorphous materials; Dexter theory; Optical materials; Phosphors; Quenching; Thin films

Coverage

Raphael R., Optoelectronic and Nanomaterials Research Laboratory, Department of Physics, Union Christian College, Aluva, 683102, Kerala, India; Anila E.I., Optoelectronic and Nanomaterials Research Laboratory, Department of Physics, Union Christian College, Aluva, 683102, Kerala, India, Christ (Deemed to be University), Bengaluru, 560029, Karnataka, India

Rights

Restricted Access

Relation

ISSN: 9258388; CODEN: JALCE

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.1016/j.jallcom.2021.159590

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85103733362&doi=10.1016%2fj.jallcom.2021.159590&partnerID=40&md5=613509ba5582f2aa9cd69e4ca193be74