Abstract

This systematic study investigates the optical properties and process−structure−property relationships of Mn-doped zinc oxide (ZnMnO) grown by metal-organic chemical vapor deposition with varying Mn-doping concentration and growth conditions. ZnMnO exhibits a good crystal quality oriented in the (002) direction and contains intermixtures of zinc oxide (ZnO)-like and manganese oxide (MnxOy)-like phases. The material exhibits a direct energy absorption band-edge and a reduction in bandgap with Mn-doping. Photoluminescence studies show that Mn-doping can simultaneously tailor broad green band luminescence and ultraviolet edge emissions. Post-growth air-annealing results in broad MnxOy-related photoluminescence emissions at 3.3–4.5 eV. A further reduction in the absorption band-edge is also observed with annealing. Results indicate that luminescence wavelengths and intensities, and absorption band-edge can be tuned with the Mn-doping process. This paper promotes a thorough understanding of defect centers in ZnO with transition metal doping and their interrelation with optical characteristics. The work provides a solid foundation for the development of optoelectronic devices, such as light emitting diodes, solar cells, lasers, and photodetectors using ZnO-based materials.

Department(s)

Electrical and Computer Engineering

Publication Status

Full Access

Comments

National Science Foundation, Grant 1560834

Keywords and Phrases

bandgap tunability; manganese doping; metal-organic chemical vapor deposition; photoluminescence; zinc oxide

International Standard Serial Number (ISSN)

2195-1071

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Wiley, All rights reserved.

Publication Date

01 Jun 2021

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