SYNTHESIS AND CHARACTERIZATION OF Li2ZnSn2O6:Mn4+ PHOSPHORS BY USING SOLID–STATE REACTIONMETHOD=SYNTHESIS AND CHARACTERIZATION OF Li2ZnSn2O6:Mn4+ PHOSPHORS BY USING SOLID

SYNTHESIS AND CHARACTERIZATION OF Li2ZnSn2O6:Mn4+ PHOSPHORS BY USING SOLID–STATE REACTIONMETHOD=SYNTHESIS AND CHARACTERIZATION OF Li2ZnSn2O6:Mn4+ PHOSPHORS BY USING SOLID–STATE REACTIONMETHOD

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Tác giả: Mai Hương Chu, Minh Tuấn Hoàng, Quang Bắc Hoàng, Văn Quang Nguyễn, Thị Lan Hương Phạm, Thị Kim Thoa Vũ

Ngôn ngữ: eng

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Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Thái Nguyên, 2024

Mô tả vật lý: tr.238 - 245

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ID: 480401

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In this study, red-emitting Li2ZnSn2O6:Mn4+ material was synthesized by solid method. The effect of temperature on the crystal structure of Li2ZnSn2O6 was investigated by X-ray diffraction (XRD), and the surface morphology of the material was investigated by field emission scanning electron microscope method (FE-SEM), analysis of optical properties using photoluminescence and photoluminescence excitation (PL, PLE) spectra. XRD results of Li2ZnSn2O6:Mn4+ material show that the material is formed and single-phase when heated at 950 and 1000 oC. When heated at 1050 and 1100 oC, in addition to the crystalline phase of Li2ZnSn2O6, SnO2 also appears. Observing the surface morphology of the material calcined at 1000 oC, the grain sizes are about 200 ÷ 500 nm. The excitation spectrum of Li2ZnSn2O6:Mn4+ consists of 260 ÷ 410 nm, 410 ÷ 560 nm, and the emission spectrum consists of two bands pecking at 658 nm and 672 nm.Trong nghiên cứu này, vật liệu Li2ZnSn2O6:Mn4+ phát xạ đỏ được tổng hợp bằng phương pháp phản ứng pha rắn. Ảnh hưởng của nhiệt độ đến cấu trúc tinh thể của Li2ZnSn2O6 được nghiên cứu bằng phương pháp nhiễu xạ tia X (XRD) và hình thái học bề mặt của vật liệu được nghiên cứu bằng phương pháp kính hiển vi điện tử quét phát xạ trường (FE-SEM), phân tích tính chất quang bằng phép đo phổ phát quang và phổ kích thích phát quang (PL,PLE). Kết quả XRD của vật liệu Li2ZnSn2O6:Mn4+ cho thấy vật liệu được hình thành đơn pha khi nung ở nhiệt độ 950 và 1000 oC, nung ở nhiệt độ 1050 và 1100 oC ngoài pha tinh thể Li2ZnSn2O6 còn xuất hiện pha tinh thể của SnO2. Quan sát hình thái bề mặt của vật liệu nung ở 1000 oC, hạt có kích thước trong khoảng 200÷500 nm. Kết quả phổ kích thích phát quang cho thấy vật liệu hấp thụ ở hai vùng 260 ÷ 410 nm, 410 ÷ 560 nm
phổ phát xạ mạnh trong vùng đỏ với các bước sóng cực đại tương ứng tại 658 nm và 672 nm.

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