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Enhanced optical properties due to indium incorporation in zinc oxide nanowires

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journal contribution
posted on 13.01.2017, 00:00 by S Farid, S Mukherjee, K Sarkar, M Mazouchi, MA Stroscio, M Dutta
Indium-doped zinc oxide nanowires grown by vapor-liquid-solid technique with 1.6 at. % indium content show intense room temperature photoluminescence (PL) that is red shifted to 20 meV from band edge. We report on a combination of nanowires and nanobelts-like structures with enhanced optical properties after indium doping. The near band edge emission shift gives an estimate for the carrier density as high as 5.5 1019 cm3 for doped nanowires according to Mott’s critical density theory. Quenching of the visible green peak is seen for doped nanostructures indicating lesser oxygen vacancies and improved quality. PL and transmission electron microscopy measurements con- firm indium doping into the ZnO lattice, whereas temperature dependent PL data give an estimation of the donor and acceptor binding energies that agrees well with indium doped nanowires. This provides a non-destructive technique to estimate doping for 1D structures as compared to the traditional FET approach. Furthermore, these indium doped nanowires can be a potential candidate for transparent conducting oxides applications and spintronic devices with controlled growth mechanism.

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Funding

This work was partially supported by Grant No. FA9550-15-1-0493 from the Air Force Office of Scientific Research.

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Publisher Statement

This is a copy of an article published in Applied Physics Letters © 2016 American Institute of Physics.

Publisher

American Institute of Physics

issn

0003-6951

Issue date

01/01/2016

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