Email this article Анализ влияния структуры ZnS:Cu,Br люминофоров на люминесцентные характеристики с применением теории перколяции
- Authors: Зеленина Е.В.1,2, Сычев М.М.1,3, Снятков И.В.1, Чуркина А.В.1
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Affiliations:
- Санкт-Петербургский государственный технологический институт (технический университет)
- АО «Радиевый Институт им. В. Г. Хлопина»
- Институт химии силикатов им. И.В. Гребенщикова (филиал НИЦ «Курчатовский институт» — ПИЯФ – ИХС)
- Issue: Vol 50, No 5 (2024)
- Pages: 464-473
- Section: Articles
- URL: https://rjmseer.com/0132-6651/article/view/679501
- DOI: https://doi.org/10.31857/S0132665124050092
- EDN: https://elibrary.ru/NSKKGX
- ID: 679501
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Fig. 1. Results of X-ray phase analysis of ZnS:Cu(0.03),Br phosphors synthesized: a – without the use of ELA; b – from electron-modified batch; c – from electron-modified batch with repeated ELA of the finished phosphor.
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Fig. 2. Dependence of the intensity of the “green” band in the radioluminescence spectrum on the content of the wurtzite phase in ZnS:Cu,Br phosphors: a – series of phosphors synthesized in different modes of electron beam processing and without it; b – series synthesized without the use of electron beam processing.
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Fig. 3. Percolation threshold as a fraction of filled nodes in the system [20].
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Fig. 4. Scheme of continuous cluster formation in phosphor grain: a) grain (conditionally square) consists only of sphalerite crystallites (s); b) crystallites with wurtzite structure (w) appear in the grain, therefore, due to the appearance of wurtzite/sphalerite interface, the diffusion rate gradually increases; c) percolation threshold – formation of continuous track for diffusion along wurtzite/sphalerite interface, diffusion rate increases sharply; d) growth of percolation cluster. Arrows show possible diffusion tracks of activator and coactivator ions along wurtzite/sphalerite interface.
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Fig. 5. Approximation of I = f(w) using the equations of percolation theory; a – samples synthesized without ELO; b – samples synthesized with ELO of the batch; c – samples synthesized with ELO of the batch and ELO of the finished phosphor.
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