Venevtsev Ivan D, Tarasov Andrey P, Muslimov Arsen E, Gorokhova Elena I, Zadorozhnaya Ludmila A, Rodnyi Piotr A, Kanevsky Vladimir M
Department of Physics, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia.
Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, Shubnikov Institute of Crystallography, 119333 Moscow, Russia.
Materials (Basel). 2021 Apr 16;14(8):2001. doi: 10.3390/ma14082001.
The presented work is dedicated to the study and comparison of scintillating properties of zinc oxide samples prepared in different morphologies: whiskers, nanowalls, multipods, and ceramics. It was shown that total transmittance, photo- and radioluminescence spectra, and radioluminescence kinetics can vary significantly depending on sample structure and preparation conditions. The highest total transmittance was registered for ZnO ceramics (>50% at 0.5 mm thickness). Differences in the transmittance of whiskers, nanowalls, and multipods can be attributed to their shape and thickness which affects the amount of light refraction and scattering. The study of radioluminescence demonstrated that all samples, except undoped ceramics and air annealed whiskers, have predominantly fast luminescence with a decay time <1 ns. High transmittance of ceramics opens the way for their use in the registration of high energy X-ray and gamma radiation, where a large volume of scintillators is required. In cases, where large scintillator thickness is not a necessity, one may prefer to use other ZnO structures, such as ensembles of whiskers and nanowalls. Studies of near-band-edge luminescence components at low temperatures showed that the structure is quite similar in all samples except Ga doped ceramics.
本文致力于研究和比较不同形态的氧化锌样品（晶须、纳米壁、多足体和陶瓷）的闪烁特性。结果表明，总透射率、光致发光和放射发光光谱以及放射发光动力学可能会因样品结构和制备条件的不同而有显著差异。氧化锌陶瓷的总透射率最高（0.5毫米厚度时>50%）。晶须、纳米壁和多足体在透射率上的差异可归因于它们的形状和厚度，这会影响光的折射和散射量。放射发光研究表明，除了未掺杂的陶瓷和空气退火的晶须外，所有样品的主要发光衰减时间均<1纳秒，为快速发光。陶瓷的高透射率为其在高能X射线和伽马射线探测中的应用开辟了道路，在这些应用中需要大量的闪烁体。在不需要大闪烁体厚度的情况下，人们可能更倾向于使用其他氧化锌结构，如晶须和纳米壁的组合。低温下近带边发光成分的研究表明，除了掺镓陶瓷外，所有样品的结构都非常相似。
