Tunable emission from green to red in the GdSr(2)AlO(5):Tb(3+),Eu(3+) phosphor via efficient energy transfer.
Tunable emission from green to red in the GdSr(2)AlO(5):Tb(3+),Eu(3+) phosphor via efficient energy transfer.
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通过高效的能量转移，GdSr2AlO5:Tb3、Eu3 荧光粉中从绿光到红光的可调发射
DOI：
10.1039/c7ra12260h
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发表时间：
2018-01-16
期刊：
影响因子：
3.9
通讯作者：
Lei, Bingfu
中科院分区：
文献类型：
--
作者：
Zhang, Yu;Zhang, Xuejie;Zhang, Haoran;Zheng, Lingling;Zeng, Yuan;Lin, Yu;Liu, Yingliang;Lei, Bingfu
本文通过高温固相反应成功合成了一系列GdSr2AlO5:Tb3+,Eu3+荧光粉，并对其晶体结构和光致发光性能进行了详细研究。与Eu3+的5D0→7F1或5D0→7F2跃迁的强发射相比，观察到对应于5D0→7F4的另一个强发射。 Tb3+ 或 Eu3+ 掺杂的 GdSr2AlO5 中的浓度猝灭并不明显，因为发现了 Gd3+→Eu3+ 和 Gd3+→Tb3+ 的结构隔离和能量转移（ET）。此外，通过发光光谱的重叠和寿命的变化验证了从Tb3+到Eu3+的能量转移过程。能量转移机制被确定为偶极-偶极相互作用，并且还获得了 ET 效率和量子效率。此外，通过改变Tb3+/Eu3+的比例，可以将GdSr2AlO5:Tb3+,Eu3+的发射颜色从绿色调整为红色。这些结果表明GdSr2AlO5:Tb3+,Eu3+荧光粉是一种很有前途的单组分白光荧光粉。
Herein, a series of GdSr2AlO5:Tb3+,Eu3+ phosphors were successfully synthesized through a high temperature solid-state reaction, and their crystal structures as well as photoluminescence properties were investigated in detail. Compared to the intense emission of 5D0 → 7F1 or 5D0 → 7F2 transition of Eu3+, another strong emission corresponding to 5D0 → 7F4 was observed. Concentration quenching is not obvious in Tb3+ or Eu3+-doped GdSr2AlO5 because structure isolation and energy transfer (ET) of Gd3+ → Eu3+ and Gd3+ → Tb3+ were found. Moreover, the energy transfer process from Tb3+ to Eu3+ was verified by the overlap of luminescence spectra and the variation of lifetime. Energy transfer mechanism was determined to be a dipole–dipole interaction, and ET efficiency as well as quantum efficiency were also obtained. Moreover, the emission color of GdSr2AlO5:Tb3+,Eu3+ can be tuned from green to red by altering the ratio of Tb3+/Eu3+. These results indicate that the GdSr2AlO5:Tb3+,Eu3+ phosphor is a promising single-component white light-emitting phosphor.
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