A comprehensive study of structural and optical properties of ZnO bulk crystals and polycrystalline films grown by sol-gel method

• DOI: 10.1007/s00339-020-03711-2
• Publication Date: 2020-06-25T07:02:24Z
• Authors: Ewelina Nowak; Miroslaw Szybowicz; Alicja Stachowiak; Wojciech Koczorowski; Detlev Schulz; Kazimierz Paprocki; Kazimierz Fabisiak; Szymon Los
• Keywords: Recrystallization (geology)

Abstract The presented article concerns the comparison between two different zinc-oxide structures - bulk crystals and polycrystalline thin films. Bulk were grown by a Bridgman method. For thin-film production, sol-gel spin-coated method was chosen. A part of layers samples annealed in 600 $$^{o}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msup> <mml:mrow /> <mml:mi>o</mml:mi> </mml:msup> </mml:math> C to induce recrystallization. morphological structural properties all investigated using various microscopy techniques, X-ray diffraction, Raman spectroscopy. Confocal scanning electron microscopy, as well XRD, used estimate influence recrystallization process on morphology samples. vibrations scattering geometries determined polarized spectra. What is more, case non-annealed layer, localized reorientation crystallites observed, microscopy. compared their optical properties, which exploiting UV-Vis absorption photoluminescence Absorption spectroscopy allowed us energy bandgap for types ZnO compare values obtained crystal structure determine possible defects correlated with growth conditions.