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首页> 外文期刊>Inorganic Chemistry Communications >A novel europium(III)-imidazol-diketonate-phenanthroline complex as a red phosphor applied in LED
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A novel europium(III)-imidazol-diketonate-phenanthroline complex as a red phosphor applied in LED

机译：新型euro（III）-咪唑-二酮酸酯-菲咯啉配合物作为红色荧光粉应用于LED

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摘要

A β-diketone, 4-imidazol-4,4,4-trifluorobutane-1,3-dione (HIDTFBD) and the corresponding europium(III) complex Eu(IDTFBD)3phen were designed and synthesized, where phen was 1,10-phenanthroline. The complex was characterized by IR, UV-visible, thermogravimetric analysis (TGA) and photoluminescence (PL) spectroscopy. Monitored at 610 nm, the Eu(III) complex exhibited a strong and wide excitation band between 320 and 420 nm due to the formation of a big π-conjugated system in the complex molecule. Under near UV-light excitation, the complex showed strong red emission of Eu~(3+) ion due to the ~5D_0-~7F_J (J=0-4) transitions. The fluorescence lifetime and the luminescence quantum yield were also measured. Finally, a bright red light-emitting diode was fabricated by coating the europium ternary complex onto an -395 nm-emitting InGaN chip, and the LED exhibited appropriate CIE chromaticity coordinates in red area. All these results suggest that the Eu (III) complex is a promising candidate as red component for fabrication of near UV-based white light-emitting diodes.
机译：设计并合成了β-二酮，4-咪唑-4,4,4-三氟丁烷-1,3-二酮（HIDTFBD）和相应的euro（III）配合物Eu（IDTFBD）3phen，其中phen为1,10-菲咯啉。该复合物通过红外，紫外可见，热重分析（TGA）和光致发光（PL）光谱进行表征。 Eu（III）络合物在610 nm处监测，由于在络合物分子中形成了大的π共轭体系，因此在320 nm和420 nm之间显示出很强的激发带。在近紫外光激发下，由于〜5D_0-〜7F_J（J = 0-4）跃迁，配合物显示出强烈的Eu〜（3+）离子红色发射。还测量了荧光寿命和发光量子产率。最后，通过将the三元络合物涂覆在发射-395 nm的InGaN芯片上来制造亮红色的发光二极管，并且LED在红色区域显示适当的CIE色度坐标。所有这些结果表明，Eu（III）配合物作为制造近紫外线基白色发光二极管的红色组分是有希望的候选物。

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