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OPTICAL SPECTRA OF THIN INTRINSIC AND AL DOPED NANOCRYSTALLINE ZNO THIN LAYERS DEPOSITED BY PULSED LASER DEPOSITION ON FUSED SILICA GLASS SUBSTRATES

1 REMEŠ Zdenek
Co-authors:
1,2 NEYKOVA Neda 2 JAIN Naini 2 SHARMA Rupendra Kumar 1,2 HOLOVSKÝ Jakub 2 UKRAINTSEV Egor 3,4 MIČOVÁ HSU Julia and Hua Shu
Institutions:
1 Czech Academy of Sciences, Institute of Physics, Praha, Czech Republic, EU, remes@fzu.cz
2 Czech Technical University, Faculty of Electrical Engineering, Prague, Czech Republic, EU, neykoned@fel.cvut.cz, sharmrup@fel.cvut.cz, jainnain@fel.cvut.cz, jakub.holovsky@fel.cvut.cz, ukraiego@fel.cvut.cz
3 Slovak Academy of Sciences, Institute of Chemistry, Bratislava, Slovakia, EU, chemjumi@savba.sk
4 National Pingtung University, Department of Applied Physics, Taiwan, hshsu@mail.nptu.edu.tw
Conference:
16th International Conference on Nanomaterials - Research & Application, OREA Congress Hotel Brno, Czech Republic, EU, October 16 - 18, 2024
Proceedings:
Proceedings 16th International Conference on Nanomaterials - Research & Application
Pages:
291-296
ISBN:
978-80-88365-24-2
ISSN:
2694-930X
DOI:
https://doi.org/10.37904/nanocon.2024.5029
Published:
28th February 2025
Metrics:
31 views / 13 downloads
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Abstract

Zinc oxide (ZnO) is a low-cost and environmentally friendly material with unique optical properties and a variety of nano and microstructures imposing challenges for energy conversion, scintillators, photocatalytic wastewater treatment, electrochemical energy storage, or sensing applications. In this work, the nominally undoped and Al-doped nanocrystalline ZnO thin layers were pulsed laser deposited (PLD) on fused silica glass. The samples were characterized by photothermal deflection (PDS) and photoluminescence (PLS) spectroscopy. Excitons were observed at low temperature in both samples at about 3.4 eV. The intrinsic samples show the red PL in near infrared region at about 1.9 eV related to zinc vacancies. The results show that optical properties can be evaluated from optical spectra of very thin nanocrystalline ZnO layers with the thickness below 100 nm.

Keywords: Pulse laser deposition, wide band gap semiconductors, optical properties, doping

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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