White light emission and energy transfer in Dy³⁺/Eu³⁺ co-doped aluminoborate glass

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• 作者：Jia-li Cai ; Ruo-ying Li ; Chong-jian Zhao ; Shao-long Tie ; Xia Wan ; ^{wanxia@scnu.edu.cn} ; Jun-ying Shen
• 关键词：Photoluminescence ; Dy3+ ; Eu3+ ; Energy transfer ; White light emission
• 刊名：Optical Materials
• 出版年：2012
• 期刊代码：81_09253467
• 类别：ch
• 出版时间：May, 2012
• 卷：34
• 期：7
• 页码：1112-1115
• 文件大小：565 K

摘要

The Dy³⁺ single doped calcium aluminoborate glass (CaO-Al₂O₃-B₂O₃-Dy₂O₃) was synthesized by melt quenching method and the photoluminescence properties of Dy³⁺ were studied. Under UV-light excitation the CaO-Al₂O₃-B₂O₃-Dy₂O₃ glass shows a yellowish white light emission and the optimum content of Dy³⁺ in glass is found at 0.022 mol. For getting pure white light emission, the Dy³⁺/Eu³⁺ co-doped glasses with the compositions of Ca_{0.978鈭?/sub>yAlB:Dy³⁺0.022, (y = 0-0.0938 mol) have been synthesized and the chromatic coordinates were calculated from their emission spectra. The results showed that the white light has been achieved by exciting Dy³⁺/Eu³⁺ co-doped glass with ultraviolet or blue light. The energy transfer phenomenon between Dy³⁺ and Eu³⁺ ions was validated in Dy³⁺/Eu³⁺ co-doped glasses and the decay rates for ⁴F9/2 level of Dy³⁺ ions have been measured. The energy transfer probabilities (Pda) are linear with acceptor (Eu³⁺) contents in the range of 0-0.0563 mol, confirming the fact that the dipole-dipole interaction is responsible for the energy transfer (ET) process of Dy³⁺ 鈫?#xA0;Eu³⁺.}