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A High Efficiency Trivalent Chromium-Doped Near-Infrared-Emitting Phosphor and Its NIR Spectroscopy Application
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-02-14 , DOI: 10.1021/acssuschemeng.0c07946
Yunpeng Zhou 1 , Xinjuan Li 2 , Takatoshi Seto 1 , Yuhua Wang 1
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-02-14 , DOI: 10.1021/acssuschemeng.0c07946
Yunpeng Zhou 1 , Xinjuan Li 2 , Takatoshi Seto 1 , Yuhua Wang 1
Affiliation
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The wearable biosensing and food safety monitoring equipment requires high-brightness and thermally stable near-infrared (NIR) phosphor-converted light emitting diodes (pc-LEDs), and the performance of these pc-LEDs is highly dependent on the properties of the NIR phosphors. This work reports an ultrawide near-infrared emission phosphor Ca3Sc2Si3O12: Cr3+. Under 460 nm excitation, Ca3Sc2Si3O12: Cr3+ presents an ultrawide emission range from 650 to 900 nm. The weak absorption capacity of Cr3+ is the main factor causing its undesirable luminous efficiency. Ce3+ was introduced into the matrix as a role of sensitizer to contribute to the improvement of the absorption of Cr3+. An efficient process for energy transfer from Ce3+ to Cr3+ can be observed within the Ca3Sc2Si3O12 codoped substance with Ce3+ and Cr3+. The sample with the best doping concentration has demonstrated excellent thermal stability. At a particular temperature at 150 °C, the phenomenon of the near-infrared emission intensity is maintained at 82% at room temperature. The output power of the NIR-pc-LED based on the Ca3Sc2Si3O12: Ce3+, Cr3+ and 450 nm chip reached 21.65 mW@350 mA. The excellent performance of penetrating human tissues demonstrated by the near-infrared pc-LED was observed.
中文翻译：
高效三价铬掺杂近红外发射荧光粉及其在近红外光谱中的应用
可穿戴式生物传感和食品安全监控设备需要高亮度和热稳定的近红外（NIR）荧光粉转换发光二极管（pc-LED），这些pc-LED的性能高度依赖于NIR的性能荧光粉。这项工作报告了一种超宽幅近红外发射荧光粉Ca 3 Sc 2 Si 3 O 12：Cr 3+。在460 nm激发下，Ca 3 Sc 2 Si 3 O 12：Cr 3+具有650至900 nm的超宽发射范围。Cr 3+的弱吸收能力是导致其不期望的发光效率的主要因素。Ce 3+作为敏化剂被引入基质中，有助于改善Cr 3+的吸收。在含有Ce 3+和Cr 3+的Ca 3 Sc 2 Si 3 O 12共掺杂物质中，可以观察到从Ce 3+到Cr 3+的有效能量转移过程。。具有最佳掺杂浓度的样品表现出优异的热稳定性。在150°C的特定温度下，室温下近红外发射强度的现象保持在82％。基于Ca 3 Sc 2 Si 3 O 12：Ce 3+，Cr 3+和450 nm芯片的NIR-pc-LED的输出功率达到21.65 mW @ 350 mA。观察到近红外pc-LED表现出的穿透人体组织的优异性能。
更新日期：2021-03-01
中文翻译：
高效三价铬掺杂近红外发射荧光粉及其在近红外光谱中的应用
可穿戴式生物传感和食品安全监控设备需要高亮度和热稳定的近红外（NIR）荧光粉转换发光二极管（pc-LED），这些pc-LED的性能高度依赖于NIR的性能荧光粉。这项工作报告了一种超宽幅近红外发射荧光粉Ca 3 Sc 2 Si 3 O 12：Cr 3+。在460 nm激发下，Ca 3 Sc 2 Si 3 O 12：Cr 3+具有650至900 nm的超宽发射范围。Cr 3+的弱吸收能力是导致其不期望的发光效率的主要因素。Ce 3+作为敏化剂被引入基质中，有助于改善Cr 3+的吸收。在含有Ce 3+和Cr 3+的Ca 3 Sc 2 Si 3 O 12共掺杂物质中，可以观察到从Ce 3+到Cr 3+的有效能量转移过程。。具有最佳掺杂浓度的样品表现出优异的热稳定性。在150°C的特定温度下，室温下近红外发射强度的现象保持在82％。基于Ca 3 Sc 2 Si 3 O 12：Ce 3+，Cr 3+和450 nm芯片的NIR-pc-LED的输出功率达到21.65 mW @ 350 mA。观察到近红外pc-LED表现出的穿透人体组织的优异性能。
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