CHẾ TẠO VÀ NGHIÊN CỨU TÍNH CHẤT QUANG CỦA CÁC CHẤM LƯỢNG TỬ BÁN DẪN ZnSe PHA TẠP ION ĐẤT HIẾM Eu3+, ĐỊNH HƯỚNG ỨNG DỤNG TRONG CHIẾU SÁNG=FABRICATION AND STUDY OF THE OPTICAL PROPERTIES OF Eu3+-DOPED ZnSe SEMICONDUCTOR QUANTUM DOTS, APPLICATION IN LIGHTING

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Tác giả: Thị Minh Thuỷ Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

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

Mô tả vật lý: tr.199 - 205

Bộ sưu tập: Báo, Tạp chí

ID: 484542

Thêm vào giỏ

Bài báo này trình bày quá trình chế tạo và nghiên cứu cấu trúc, tính chất quang của các chấm lượng tử ZnSe pha tạp ion Eu³⁺ với các nồng độ 0 %, 1 %, 3 % và 5%. Mục tiêu của nghiên cứu là khảo sát ảnh hưởng của nồng độ ion Eu³⁺ đến cấu trúc, tính chất hấp thụ và phát xạ quang huỳnh quang của vật liệu. Các mẫu được tổng hợp bằng phương pháp hóa ướt, sau đó được nghiên cứu bằng các kỹ thuật nhiễu xạ tia X (XRD), phân tích thành phần (EDX), phổ hấp thụ UV-Vis, phổ kích thích huỳnh quang và phổ huỳnh quang (PL). Kết quả XRD cho thấy các mẫu đều có cấu trúc tinh thể lập phương. Các phân tích từ phổ hấp thụ UV-Vis cho thấy sự dịch chuyển đỉnh hấp thụ về phía bước sóng dài khi nồng độ Eu³⁺ tăng lên, thể hiện sự ảnh hưởng của ion Eu³⁺ đến cấu trúc vùng năng lượng của các QD ZnSe. Phổ huỳnh quang của các QD ZnSe pha tạp ion Eu³⁺ cho thấy sự phát xạ đặc trưng của ion Eu³⁺ và mở rộng vùng phát xạ về phía ánh sáng đỏ so với các QD ZnSe không pha tạp. Kết quả này cho thấy tiềm năng ứng dụng của các QD ZnSe pha tạp ion Eu³⁺ trong lĩnh vực chiếu sáng.This paper presents the process of fabrication and study of the structure and optical properties of ZnSe quantum dots doped with Eu³⁺ ions at concentrations of 0%, 1%, 3%, and 5%. The purpose of this paper is to investigate the influence of Eu³⁺ ion concentration on the structure, absorption, and fluorescence emission properties of the material. The samples were synthesized by wet chemical method and studied by X-ray diffraction (XRD), compositional analysis (EDX), UV-Vis absorption spectroscopy, fluorescence excitation spectroscopy, and photoluminescence (PL) spectroscopy. The XRD results showed that all samples had cubic crystal structures. The UV-Vis absorption spectra showed a shift of the absorption peak toward longer wavelengths when the Eu³⁺ concentration increased, demonstrating the influence of Eu³⁺ ions on the energy band structure of ZnSe QDs. The PL spectra of Eu³⁺-doped ZnSe QDs showed characteristic emission of Eu³⁺ ions and broadened emission band toward red light compared to undoped ZnSe QDs. This result shows the potential application of Eu³⁺-doped ZnSe QDs in the field of lighting.

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