Pulsed laser deposited hexagonal wurzite ZnO thin-film nanostructures/nanotextures for nanophotonics applications

Cyril R. A. John Chelliah; Rajesh Swaminathan

doi:10.1117/1.JNP.12.016013

13 February 2018 Pulsed laser deposited hexagonal wurzite ZnO thin-film nanostructures/nanotextures for nanophotonics applications

Cyril R. A. John Chelliah, Rajesh Swaminathan

Author Affiliations +

Journal of Nanophotonics, Vol. 12, Issue 1, 016013 (February 2018). https://doi.org/10.1117/1.JNP.12.016013

Abstract

The high-quality and transparent thin-film zinc oxide (ZnO) nanostructures/nanotextures deposited on glass and silicon substrates using pulsed laser deposition (PLD) technique are reported. A solid-state, Nd-YAG laser was used for the PLD process. The films were deposited (i) at room temperature of 25°C (as deposited), (ii) at 150°C, (iii) at 300°C, (iv) at 450°C, and (v) at 600°C and annealed in the vacuum chamber. The depositions were also carried out at different laser repetition rates such as 10 and 5 Hz. UV spectroscopy and photoluminescence (PL) spectroscopy were carried out for optical studies. X-ray diffraction studies were carried out for all samples and analyzed the effects of the laser repetition rate, deposition, and annealing temperatures on the structural properties. Field-emission scanning electron microscope images are recorded for the best-structured samples. The electrical parameters were calibrated using the Hall effect measurement system and the IV characterization was performed using a CHI Electrochemical workstation. The deposition temperature has a significant effect on the microstrain and dislocation density of the ZnO thin film and optical phenomena with various electrical parameters, including the electron mobility, conductivity, and magnetoresistance. These promising results are suitable conditions for nanophotonics applications.

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Cyril R. A. John Chelliah and Rajesh Swaminathan "Pulsed laser deposited hexagonal wurzite ZnO thin-film nanostructures/nanotextures for nanophotonics applications," Journal of Nanophotonics 12(1), 016013 (13 February 2018). https://doi.org/10.1117/1.JNP.12.016013

Received: 10 September 2017; Accepted: 16 January 2018; Published: 13 February 2018

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