TỔNG HỢP VÀ TÍNH CHẤT PHÁT QUANG CỦA VẬT LIỆU HYDROXYAPATITE (HA):Er, Yb ĐỊNH HƯỚNG ỨNG DỤNG TRONG QUANG ĐIỆN TỬ VÀ Y SINH=SYNTHESIS AND OPTICAL PROPERTIES OF HYDROXYAPATITE MATERIAL (HA):Er, Yb ORIENTED TOWARDS APPLICATIONS IN OPTOELECTRONICS AND BIOMEDICINE

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Tác giả: Như Vân Hoàng, Tiến Hà Lê, Thị Lan Nguyễn, Hùng Vượng Phạm

Ngôn ngữ: vie

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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.144 - 150

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ID: 484529

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In this work, we report the intense green upconversion (UC) emission in hydroxyapatite (HA):Er, Yb phosphor synthesized using the combustion method following heat treatment at 900 ℃ for 3 h in air. The material was characterized for its structure, morphology, elemental composition, and luminescent properties using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), and photoluminescence spectroscopy (PL). XRD results confirm the main phase hydroxyapatite (HA) and a tract amount of the tricalcium phosphate (β-TCP) phase with high crystallinity of the obtained material. EDS analysis shows that the presence of elements of the host lattice (Ca, P, O) and dopant ions (Er, Yb) and other impurities elements did not appear. Under 975 nm excitation, the obtained phosphor behave intense green emission at 530/554 nm and weak green emission at 660 nm of the Er3+ ion. The selective enhancement of red UC emission corresponds to an energy transfer from Yb3+ to Er3+ ions. The results indicate that HA:Er, Yb phosphor promising material for optoelectronics and biomedical applications.Trong công trình này, chúng tôi báo cáo tính chất phát xạ chuyển đổi ngược mạnh vùng màu xanh của vật liệu hydroxyapatite (HA):Er, Yb tổng hợp bằng phương pháp đốt cháy, và xử lý nhiệt ở 900 ℃ trong thời gian 3 giờ, trong môi trường không khí. Cấu trúc, hình thái, thành phần nguyên tố hóa học và tính chất phát quang của vật liệu được thực hiện bằng các phép phân tích như phổ nhiễu xạ tia X (XRD), kính hiển vi điện tử quét (FE-SEM), phổ tán xạ năng lượng tia X (EDS), và phổ phát xạ PL. Kết quả XRD xác nhận mẫu vật liệu tồn tại hai pha, pha chiếm hàm lượng lớn là HA có cấu trúc lục giác, và một lượng nhỏ pha tricalcium phosphate (β-TCP) có cấu trúc trực thoi, cả hai pha có độ kết tinh cao. Phân tích EDS cho thấy vật liệu có các nguyên tố cấu tạo mạng nền (Ca, P, O) và các nguyên tố pha tạp (Er, Yb) và không quan sát thấy các nguyên tố tạp chất. Với bước sóng kích thích từ nguồn laser 975 nm, bột phosphor cho phát xạ UC mạnh tại đỉnh 530 và 554 nm và phát xạ yếu vùng màu đỏ 660 nm của ion Er3+. Sự phát xạ xanh là do sự truyền năng lượng từ ion Yb3+ sang ion Er3+. Các kết quả này cho thấy vật liệu phosphor HA:Er, Yb có thể được sử dụng cho các ứng dụng trong quang điện tử và y sinh.

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