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Improving and broadening luminescence in Gd2−xAlxGaSbO7:Cr3+ phosphors for NIR LED applications
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2023-03-07 , DOI: 10.1039/d3qi00229b
Siyu Guo 1 , Ligan Ma 1 , Muniran Abudureyimu 1 , Rongfei Wei 1 , Fumin Lu 1 , Fangfang Hu 1 , Hai Guo 1
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2023-03-07 , DOI: 10.1039/d3qi00229b
Siyu Guo 1 , Ligan Ma 1 , Muniran Abudureyimu 1 , Rongfei Wei 1 , Fumin Lu 1 , Fangfang Hu 1 , Hai Guo 1
Affiliation
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Near-infrared (NIR) spectroscopy has garnered substantial attention owing to its diverse merits and widespread applications. Meanwhile developing phosphors with broadband and efficient NIR emission is still an enormous challenge for constructing NIR light sources. Herein, enhanced and broadened NIR luminescence of Gd2−xAlxGaSbO7 (G2−xAxGSO):y%Cr3+ phosphors can be realized via modifying the crystal field environment of Cr3+ induced by Al3+ → Gd3+ cation substitution. Upon blue light irradiation, G1.4A0.6GSO:4%Cr3+ exhibits a broadband luminescence ranging from 650 to 1000 nm with a full width at half maximum (FWHM) of 136 nm, excellent thermal stability, and a tiny chromaticity shift. Through incorporating the resulting powders into a blue light-emitting diode (LED) chip, a NIR phosphor-converted (pc) LED with a high output power of 62.99 mW and a photoelectric conversion efficiency of 13.38% was manufactured. The fabricated pc-LED shows application potential in nondestructive food analysis. These findings confirm that the as-synthesized G2−xAxGSO:Cr3+ phosphor is a promising candidate for application in NIR pc-LEDs.
中文翻译：
改善和拓宽 Gd2−xAlxGaSbO7:Cr3+ 磷光体的发光，用于 NIR LED 应用
近红外 (NIR) 光谱由于其多样的优点和广泛的应用而受到广泛关注。同时开发具有宽带和高效近红外发射的荧光粉仍然是构建近红外光源的巨大挑战。在此，增强和拓宽Gd 2− x Al x GaSbO 7 (G 2− x A x GSO): y %Cr 3+荧光粉的近红外发光可以通过改变由Al 3+诱导的Cr 3+的晶场环境来实现→ Gd 3+阳离子取代。蓝光照射时，G 1.4 A0.6 GSO:4%Cr 3+表现出650至1000 nm的宽带发光，半峰全宽（FWHM）为136 nm，具有出色的热稳定性和微小的色度偏移。通过将所得粉末掺入蓝光发光二极管 (LED) 芯片中，制成了具有 62.99 mW 高输出功率和 13.38% 光电转换效率的 NIR 磷光体转换 (pc) LED。制造的 pc-LED 在无损食品分析中显示出应用潜力。这些发现证实，合成后的 G 2− x A x GSO:Cr 3+荧光粉是 NIR pc-LED 中应用的有前途的候选者。
更新日期：2023-03-07
中文翻译：
改善和拓宽 Gd2−xAlxGaSbO7:Cr3+ 磷光体的发光，用于 NIR LED 应用
近红外 (NIR) 光谱由于其多样的优点和广泛的应用而受到广泛关注。同时开发具有宽带和高效近红外发射的荧光粉仍然是构建近红外光源的巨大挑战。在此，增强和拓宽Gd 2− x Al x GaSbO 7 (G 2− x A x GSO): y %Cr 3+荧光粉的近红外发光可以通过改变由Al 3+诱导的Cr 3+的晶场环境来实现→ Gd 3+阳离子取代。蓝光照射时，G 1.4 A0.6 GSO:4%Cr 3+表现出650至1000 nm的宽带发光，半峰全宽（FWHM）为136 nm，具有出色的热稳定性和微小的色度偏移。通过将所得粉末掺入蓝光发光二极管 (LED) 芯片中，制成了具有 62.99 mW 高输出功率和 13.38% 光电转换效率的 NIR 磷光体转换 (pc) LED。制造的 pc-LED 在无损食品分析中显示出应用潜力。这些发现证实，合成后的 G 2− x A x GSO:Cr 3+荧光粉是 NIR pc-LED 中应用的有前途的候选者。
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