Photoluminescence characteristics of Sm³⁺ doped Ba₃La(PO₄)₃ as new orange-red emitting phosphors

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• 作者：Ruijin Yu ; Hyeon Mi Noh ; Byung Kee Moon ; Byung Chun Choi ; Jung Hyun Jeong ; Ho Sueb Lee ; Kiwan Jang ; Soung Soo Yi
• 关键词：Luminescence ; Ba3La(PO4)3 ; Sm3+ ; Phosphor ; Orthophosphate
• 刊名：Journal of Luminescence
• 出版年：January, 2014
• 年：2014
• 卷：145
• 期：Complete
• 页码：717-722
• 全文大小：1725 K

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Abstract

A series of orange-red emitting Ba₃La(PO₄)₃:xSm³⁺ (0.01鈮?em>x鈮?.30) phosphors was synthesized by the convenient solid-state reaction. X-ray diffraction and photoluminescence spectra were utilized to characterize the structure and luminescence properties of the as-synthesized phosphors. The emission spectra of the Ba₃La(PO₄)₃:Sm³⁺ phosphors consisted of some sharp emission peaks of Sm³⁺ ions centered at 563 nm, 600 nm, 647 nm, 710 nm. The strongest one is located at 600 nm due to ⁴G_5/2-⁶H_7/2 transition of Sm³⁺, generating bright orange-red light. The optimum dopant concentration of Sm³⁺ ions in Ba₃La(PO₄):xSm³⁺ is around 5 mol% and the critical transfer distance of Sm³⁺ is calculated as 22 脜. The CIE chromaticity coordinates of the Ba₃La(PO₄)₃:0.05Sm³⁺ phosphors was is located in the orange reddish region. The Ba₃La(PO₄)₃:Sm³⁺ phosphors may be potentially used as red phosphors for white light-emitting diodes.