<br>Cr3+、Ni2+共掺杂Sr2GaTaO6荧光粉蓝光激发下NIR-I和NIR-II的超宽带发射通过双位点占据和有效能量转移实现,Laser & Photonics Reviews

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Cr3+、Ni2+共掺杂Sr2GaTaO6荧光粉蓝光激发下NIR-I和NIR-II的超宽带发射通过双位点占据和有效能量转移实现
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2024-03-20 , DOI: 10.1002/lpor.202400105
Yifu Zhuo ₁ , Fugen Wu ₂ , Yaping Niu ₁ , Yun Wang ₁ , Qi zhang _{3,

4,

5} , Yun Teng _{4,

5} , Huafeng Dong ₆ , Zhongfei Mu _{1,

2,

7}

Affiliation

近红外荧光粉转换发光二极管（NIR pc-LED）的性能主要取决于所使用的近红外发射荧光粉。 Cr ³⁺掺杂材料可以被蓝光芯片激发，但其发射位于 NIR-I 区域（650–1000 nm）。 Ni ²⁺掺杂材料主要位于NIR-II区域（1000~1700 nm），但不能被蓝光芯片有效激发。本文制备并研究了Cr ³⁺ 、Ni ²⁺单掺杂和共掺杂Sr ₂ GaTaO ₆近红外发射磷光体。 Cr ³⁺和Ni ²⁺离子占据Ga ³⁺和Ta ⁵⁺的两个八面体位点。 Cr ³⁺离子的共掺杂取得了两大突破。一是由于能量从Cr ³⁺到Ni ²⁺的转移（效率高达70%），将最佳激发波长从紫光转移到蓝光。另一个是实现跨NIR-I和NIR-II区域（650-1700 nm，半峰全宽（FWHM）为410 nm（173 nm + 237 nm））的宽带连续发射。所制备的Sr ₂ GaTaO ₆ : 0.02Cr ³⁺ , 0.01Ni ²⁺荧光粉与商用460 nm蓝光芯片结合，实现其在有机化合物识别、夜视、生物成像等方面的应用。这项工作为高效超宽带近红外发射荧光粉的未来发展指明了方向。

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Super Broadband Emission Across NIR-I and NIR-II Under Blue Light Excitation of Cr3+, Ni2+ Co-Doped Sr2GaTaO6 Phosphor Achieved by Two-Site Occupation and Effective Energy Transfer

The performance of the near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) mainly depends on the NIR emitting phosphors used. Cr³⁺ doped materials can be excited by blue light chips, but their emission is located in the NIR-I region (650–1000 nm). Ni²⁺ doped materials are mainly located in the NIR-II region (1000–1700 nm), but they cannot be effectively excited by blue light chips. Herein, Cr³⁺, Ni²⁺ mono-doped, and co-doped Sr₂GaTaO₆ NIR emitting phosphors are prepared and investigated. Cr³⁺ and Ni²⁺ ions occupy two octahedral sites of Ga³⁺ and Ta⁵⁺. The co-doping of Cr³⁺ ions has achieved two breakthroughs. One is to shift the optimal excitation wavelength from violet light to blue light due to the energy transfer (efficiency up to 70%) from Cr³⁺ to Ni²⁺. The other is to achieve the broadband and continuous emission across NIR-I and NIR-II regions (650–1700 nm, with a full width at half maximum (FWHM) of 410 nm (173 nm + 237 nm)). The prepared Sr₂GaTaO₆: 0.02Cr³⁺, 0.01Ni²⁺ phosphor is combined with a commercial 460 nm blue chip to realize its application in organic compounds identification, night vision, and biological imaging. This work points out a direction for the future development of efficient super broadband NIR-emitting phosphors.

更新日期：2024-03-20

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