Synthesis and luminescence properties of Sm³⁺-doped La₂W_yMo_{2鈭?span style='font-style: italic'>y}O₉ orange-red phosphors

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• 作者：Yaomin Deng ; Shuangping Yi ; Jun Huang ; Weiren Zhao ; Jieqiang Xian
• 关键词：La2WyMo2&minus ; yO9 ; Sm3+ ; Phosphor ; Orange-red emitting ; White LED
• 刊名：Physica B
• 出版年：15 January, 2014
• 年：2014
• 卷：433
• 期：Complete
• 页码：133-137
• 全文大小：1404 K

文摘

La₂W_yMo_2鈭?em>yO₉ phosphors activated with the trivalent rare-earth Sm³⁺ were synthesized via a traditional solid-state reaction, their structure and luminescence properties were investigated by using X-ray diffractometer and fluorescence spectrophotometer. There were three emission peaks centered at 563, 599, and 646 nm corresponding to the ⁴G_5/2鈫?sup>6H_5/2, ⁴G_5/2鈫?sup>6H_7/2, ⁴G_5/2鈫?sup>6H_9/2 transitions of Sm³⁺ under the 402 nm ultraviolet excitation. Investigation on Sm³⁺ concentration-dependent emission spectra indicated that La_1.97WMoO₉:3% Sm³⁺ phosphor exhibited the strongest orange-red emission with a CIE value of (0.5425, 0.4541). Therefore, it is considered to be a new promising orange-red emitting phosphor for white light emitting diode (LED) application.