Open AccessРентгенолюминесценция нитевидных микроструктур ZnO
Author(s) -
А. Э. Муслимов,
И. Д. Веневцев,
Л. А. Задорожная,
П. А. Родный,
В. М. Каневский
Publication year - 2020
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2020.14.49667.18159
Subject(s) - luminescence , materials science , whisker , sapphire , whiskers , crystal (programming language) , photoluminescence , absorption (acoustics) , substrate (aquarium) , microstructure , transmittance , infrared , optoelectronics , analytical chemistry (journal) , optics , chemistry , composite material , laser , oceanography , physics , chromatography , computer science , programming language , geology
The morphology, optical and luminescent properties of an ensemble of ZnO whisker microcrystals on sapphire substrate obtained by gas transport synthesis from zinc and oxygen vapors by the vapor – liquid – crystal mechanism are studied. The ensemble is formed by uniaxial ZnO microcrystallites of two morphologies: a combination of a hexagonal prism and single crystal microrods. The absorption edge of the ensemble of whisker microstructures is located in the 385-395 nm region. The total transmittance of the sample in the visible and near-infrared regions is around 10–20% with a layer thickness around 15–18 μm. The X-ray luminescence spectrum is represented by two bands: narrow peak of excitonic emission with a maximum at 388.3 nm and wide peak of defect-related luminescence in the region of 430–600 nm. The decay time constant for excitonic luminescence is around 1.1 ns (not accounted for the width of the excitation pulse), which was obtained for the first time in undoped ZnO microstructures.