A single luminescence center ultra-broadband near-infrared LiScGeO4:Cr phosphor for biological tissue penetration
| Autor: | Xiaoxue Huo, Huifang Yang, Jinxin Zhao, Yu Wang, Hao Suo, Qian Wu, Panlai Li, Dawei Wang, Zejun Ye, Zhijun Wang |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Near-infrared spectroscopy Phosphor 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences law.invention Ion Inorganic Chemistry Crystal Full width at half maximum law Optoelectronics Emission spectrum 0210 nano-technology Luminescence business Light-emitting diode |
| Zdroj: | Dalton Transactions. 50:10092-10101 |
| ISSN: | 1477-9234 1477-9226 |
| DOI: | 10.1039/d1dt01244d |
| Popis: | In this work, in order to meet the application of near-infrared phosphor-converted light emitting diodes (pc-LEDs), an ultra-broadband emission phosphor, LiScGeO4:Cr, was synthesized. Its FWHM reaches 335 nm, and its emission spectrum ranges from 800 nm to 1650 nm, which almost covers the entire near-infrared second window (NIR-II). The broadband emission is thought to be caused by the 4T2 → 4A2 transition of the Cr3+ ion. This transition occurs due to the olivine structure of the crystal, which causes the Cr3+ ions to inhabit a low-symmetric crystal field, and the crystal field strength is very weak. NIR pc-LEDs were fabricated by combining a 460 nm blue LED with this phosphor, which penetrates 4 cm thick beef. The results indicate that there may be a potential application for this phosphor in the field of biological tissue penetration and non-destructive testing. |
| Databáze: | OpenAIRE |
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