Influence of annealing on Raman and photoluminescence spectra of single crystal ZnO

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00599262" target="_blank" >RIV/68378271:_____/24:00599262 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389021:_____/24:00599262

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Influence of annealing on Raman and photoluminescence spectra of single crystal ZnO

Popis výsledku v původním jazyce

Zinc oxide exhibits high electron mobility, wide 3.3eV band gap, ability to sustain large electric fields, relative low electronic noise, and strong luminescence at room temperature. These properties make ZnO invaluable for a broad range of applications. It is therefore important to study to influence of treatment on its properties under various conditions. In this work we compare Fourier transform infrared Raman (FTIR Raman, 1064 nm laser excitation, 70-3500/cm spectral range, 1/cm spectral resolution) and photoluminescence (PL, 360 nm UV LED excitation, 375-700 nm spectral range, 1 ns time resolution) optical spectra of as the received and annealed ZnO single crystals. The annealing has been done in oxidizing and reducing atmosphere at 350, 500 and 700C. The Raman spectra show two characteristic peaks at 100/cm and 440/cm associated with the sublattice oscillations of Zn and O, respective, and a broad PL band in the visible spectrum with mean time decay about 10 microseconds. The optical measurements are correlated with the topographical information obtained by atomic force microscopy (AFM). We analyze trends in the optical spectra related to vacancy rearrangements in the lattice, and showed a possible next course of action for further research.

Název v anglickém jazyce

Influence of annealing on Raman and photoluminescence spectra of single crystal ZnO

Popis výsledku anglicky

Zinc oxide exhibits high electron mobility, wide 3.3eV band gap, ability to sustain large electric fields, relative low electronic noise, and strong luminescence at room temperature. These properties make ZnO invaluable for a broad range of applications. It is therefore important to study to influence of treatment on its properties under various conditions. In this work we compare Fourier transform infrared Raman (FTIR Raman, 1064 nm laser excitation, 70-3500/cm spectral range, 1/cm spectral resolution) and photoluminescence (PL, 360 nm UV LED excitation, 375-700 nm spectral range, 1 ns time resolution) optical spectra of as the received and annealed ZnO single crystals. The annealing has been done in oxidizing and reducing atmosphere at 350, 500 and 700C. The Raman spectra show two characteristic peaks at 100/cm and 440/cm associated with the sublattice oscillations of Zn and O, respective, and a broad PL band in the visible spectrum with mean time decay about 10 microseconds. The optical measurements are correlated with the topographical information obtained by atomic force microscopy (AFM). We analyze trends in the optical spectra related to vacancy rearrangements in the lattice, and showed a possible next course of action for further research.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů