Optical characterization of pure and Al-doped ZnO prepared by sol-gel method

Radosław Belka; Justyna Kęczkowska; Justyna Kasińska

doi:10.1117/12.2248368

28 September 2016 Optical characterization of pure and Al-doped ZnO prepared by sol-gel method

Radosław Belka, Justyna Kęczkowska, Justyna Kasińska

Proceedings Volume 10031, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2016; 1003106 (2016) https://doi.org/10.1117/12.2248368
Event: Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2016, 2016, Wilga, Poland

Abstract

In this paper the preparation process and optical characterization of pure and Al³⁺ doped zinc oxide (Al:ZnO) coatings will be presented. ZnO based materials have been studied extensively due to their potential applications in optoelectronic devices as conductive gas sensors, transparent conductive, electrodes, solar cell windows, varistors, UVfilters or photovoltaic cells. It is II–VI semiconductor with wide-band gap of 3.37 eV and large exciton binding energy of 60meV. It is possible to improve the conductivity of ZnO coating by intentionally doping ZnO with aluminium ions during preparation process. Such transparent and conducting thin films, known as AZO (Aluminium Zinc Oxide) films, are very good candidate for application as transparent conducting materials in many optoelectronic devices. The well-known sol-gel method is used for preparation of solution, coated on glass substrates by dip coating process. Prepared samples were investigated by Raman and UV-VIS spectroscopy. Transmittance as well as specular and diffuse reflectance spectroscopy methods were used for studies of optical parameters. We found that Al admixture influences on optical bandgap of ZnO.

Citation Download Citation

Radosław Belka, Justyna Kęczkowska, and Justyna Kasińska "Optical characterization of pure and Al-doped ZnO prepared by sol-gel method ", Proc. SPIE 10031, Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2016, 1003106 (28 September 2016); https://doi.org/10.1117/12.2248368

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