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Ultra-broad Near-Infrared Emitting Phosphor LiInF4: Cr3+ with Extremely Weak Crystal Field
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2023-07-03 , DOI: 10.1021/acs.inorgchem.3c01162 Liping Song 1, 2, 3, 4 , Sisi Liang 3, 4 , Wendong Nie 3, 4 , Xianguo He 3, 4 , Jie Hu 3, 4 , Fulin Lin 3, 4 , Haomiao Zhu 1, 2, 3, 4
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2023-07-03 , DOI: 10.1021/acs.inorgchem.3c01162 Liping Song 1, 2, 3, 4 , Sisi Liang 3, 4 , Wendong Nie 3, 4 , Xianguo He 3, 4 , Jie Hu 3, 4 , Fulin Lin 3, 4 , Haomiao Zhu 1, 2, 3, 4
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Recent decades have witnessed a major development in broadband near-infrared (NIR)-emitting phosphors because of their potential applications in real-time nondestructive examination. These applications require the emission spectra of phosphors to be as broad as possible for efficient performance. Therefore, a blue-light excited LiInF4: Cr3+ phosphor with a NIR emission covering 700–1400 nm is successfully synthesized. Under 470 nm excitation, it shows broadband emission peaked at 980 nm with the full-width at half maximum of 210 nm. The structure and crystal field environment are investigated in detail, and the LiInF4: Cr3+ possesses a weak crystal field strength and strong electron–phonon coupling. An efficient NIR phosphor-converted light-emitting diode (pc-LED) is fabricated by the prepared LiInF4: Cr3+ phosphor and commercial blue diode chip, generating a NIR radiant flux of 5.54 mW at 150 mA drive current. Finally, the NIR pc-LED is successfully applied to identify the blood vessel distribution of the hand. This work suggests the potential of LiInF4: Cr3+ phosphor in applications.
中文翻译：
晶体场极弱的超宽近红外发射荧光粉LiInF4: Cr3+
近几十年来，宽带近红外（NIR）发射荧光粉因其在实时无损检测中的潜在应用而取得了重大发展。这些应用要求荧光粉的发射光谱尽可能宽，以实现高效性能。因此，成功合成了近红外发射覆盖700-1400 nm的蓝光激发LiInF 4 : Cr 3+荧光粉。在 470 nm 激发下，其宽带发射峰值为 980 nm，半峰全宽为 210 nm。对结构和晶体场环境进行了详细研究，得到了LiInF 4 : Cr 3+具有弱的晶体场强和强的电子声子耦合。利用所制备的LiInF 4 : Cr 3+荧光粉和商用蓝色二极管芯片制备了高效的近红外荧光粉转换发光二极管（pc-LED），在150 mA的驱动电流下产生5.54 mW的近红外辐射通量。最后，NIR pc-LED成功应用于识别手部血管分布。这项工作表明了LiInF 4 : Cr 3+荧光粉在应用中的潜力。
更新日期：2023-07-03
中文翻译：
晶体场极弱的超宽近红外发射荧光粉LiInF4: Cr3+
近几十年来，宽带近红外（NIR）发射荧光粉因其在实时无损检测中的潜在应用而取得了重大发展。这些应用要求荧光粉的发射光谱尽可能宽，以实现高效性能。因此，成功合成了近红外发射覆盖700-1400 nm的蓝光激发LiInF 4 : Cr 3+荧光粉。在 470 nm 激发下，其宽带发射峰值为 980 nm，半峰全宽为 210 nm。对结构和晶体场环境进行了详细研究，得到了LiInF 4 : Cr 3+具有弱的晶体场强和强的电子声子耦合。利用所制备的LiInF 4 : Cr 3+荧光粉和商用蓝色二极管芯片制备了高效的近红外荧光粉转换发光二极管（pc-LED），在150 mA的驱动电流下产生5.54 mW的近红外辐射通量。最后，NIR pc-LED成功应用于识别手部血管分布。这项工作表明了LiInF 4 : Cr 3+荧光粉在应用中的潜力。
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