Luminescence properties of a novel orange-red CaBi₂B₂O₇:Eu³⁺ phosphor for near-UV pumped W-LEDs

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• 作者：Jiangong Li^a ; ^{lijiangong01@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; ^{lijiangong888@163.com" class="auth_mail" title="E-mail the corresponding author} ; Huifang Yan^b ; Fengmei Yan^c
• 关键词：Phosphor ; Luminescence properties ; Borate ; Eu3+
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：127
• 期：10
• 页码：4541-4544
• 全文大小：824 K

文摘

A new orange–red CaBi₂B₂O₇:Eu³⁺ phosphor was synthesized by conventional high temperature solid-state reaction method. Its crystal structure, luminescence properties were investigated. This phosphor can be effectively excited by 394 nm near ultraviolet light and exhibit bright orange–red emission with the emission peaks located at 581, 591 and 614 nm corresponding to the ⁵D₀ → ⁷F_j (j = 0–2) transition of Eu³⁺ ions, respectively. The optimum Eu³⁺ ions concentration in CaBi₂B₂O₇ is 17.0 mol% and the critical transfer distance is determined to be 15.13 Å. Moreover, the CIE chromaticity coordinate and the color purity performances of CaBi₂B₂O₇:Eu³⁺ were also discussed. The present work suggests that the CaBi₂B₂O₇:Eu³⁺ phosphor is a potential orange–red material for the application in the near-UV pumped white light emitting diodes.