Synthesis and luminescent properties of terbium complex containing 4-benzoylbenzoic acid for application in NUV-based LED

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• 作者：Naiqun SUN ((孙乃群))^a ; ^b ; Xijin ZHAO ((赵希瑾))^a ; ^b ; Yamin YANG ((杨亚敏))^a ; ^b ; Liping LI ((李利平))^a ; ^b ; Aiqin ZHANG ((张爱琴))^c ; ^{zaq6014567@126.com" class="auth_mail" title="E-mail the corresponding author} ; Husheng JIA ((贾虎生))^a ; ^b ; ^{jia_husheng@126.com" class="auth_mail" title="E-mail the corresponding author} ; Xuguang LIU ((刘旭光))^a ; ^d
• 关键词：4-benzoylbenzoic acid ; Tb(III) complex ; fluorescence ; quantum yield ; lifetime ; rare earths
• 刊名：Journal of Rare Earths
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：34
• 期：2
• 页码：130-136
• 全文大小：943 K

文摘

A novel Tb(III) ternary complex Tb(p-BBA)₃MAA was synthesized with 4-benzoylbenzoic acid (p-BBA) and methacrylic acid (MAA) as ligands. The complex was characterized by IR, UV-visible, thermogravimetric analysis and fluorescence spectroscopy. Monitored at 544 nm, the complex displayed wide and strong excitation band at 300-400 nm, which matched well with the 365 nm-emitting UV chip. The complex exhibited excellent green emission at 544 nm (⁵D₄→⁷F₅ transition of Tb³⁺) under an excitation at 365 nm. Besides, the complex showed high thermal stability. Its intramolecular energy transfer process was further discussed. Furthermore, the complex also had higher fluorescence lifetime (1.38 ms) and higher quantum yield (0.372). Finally, electroluminescent properties indicated that when used to fabricate LED with 365 nm UV chip (power efficiency is 18.6 lm/W), the complex remained its favorable optical performance. These results implied that Tb(p-BBA)₃MAA could be used as a green phosphor for NUV-based white LED.