Regulating chromium ions site occupancy and enhancing near-infrared luminescence properties of Sr2P2O7:Cr3+ phosphor through synthesizing under reduction atmosphere
Regulating chromium ions site occupancy and enhancing near-infrared luminescence properties of Sr2P2O7:Cr3+ phosphor through synthesizing under reduction atmosphere
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DOI：
10.1016/j.materresbull.2021.111710
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发表时间：
2021-12
影响因子：
5.4
通讯作者：
Shengjian Jiao;R. Pang;Shangwei Wang;Haiyan Wu;T. Tan;Su Zhang;Lihong Jiang;Da Li;Chengyu Li;Hongjie Zhang
中科院分区：
文献类型：
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作者：
Shengjian Jiao;R. Pang;Shangwei Wang;Haiyan Wu;T. Tan;Su Zhang;Lihong Jiang;Da Li;Chengyu Li;Hongjie Zhang
近年来，近红外荧光粉转换发光二极管受到广泛关注。宽带近红外发射荧光粉也已成为热门研究课题，这对于基于蓝光LED的先进近红外发射光源至关重要。在这项工作中，开发了一种新型近红外荧光粉 Sr2P2O7:Cr3+，其发射（700 − 1200 nm）完全在近红外光谱范围内。有趣的是，通过在还原气氛中烧结，荧光粉的发光比在空气中煅烧的样品大大增强了13−14倍，这可归因于晶格位点占据的差异、Cr3+价态的保持和晶体场环境的变化。该荧光粉还表现出良好的温度敏感性，可用作发光温度计。本文为以简单的方式探索和优化更多的Cr3+掺杂近红外荧光粉提供了一种切实可行、有效的策略。
In recent years, near-infrared phosphor converted light-emitting diodes have gained extensive attention. Broadband near-infrared-emitting phosphors have become a hot research topic as well, which are crucial for advanced near-infrared-emitting light sources based on blue LEDs. In this work, a novel near-infrared phosphor Sr2P2O7:Cr3+is developed with the emissions (700 − 1200 nm) completely in the near-infrared spectral range. Interestingly, by sintering in a reducing atmosphere, the luminescence of the phosphor is vastly enhanced by 13 − 14 times compared with the sample calcined in the air, which can be attributed to the difference in the lattice sites occupancy, maintaining the valence state of Cr3+and changes in the crystal field environment. The phosphor also exhibited good temperature sensitivity and may be used as a luminescence thermometer. Herein, a practicable and effective strategy is provided to explore and optimize more Cr3+-doped near-infrared phosphors just in a simple way.