Библиографическое описание:Abnormal Lattice Shrinkage, Site Occupation, and Luminescent Properties of Cr3+-Activated β-Al2O3 Structure Phosphors : научное издание / H. H. Zhu [et al.]. - Текст : непосредственный // Laser & Photonics Reviews. - 2024. - № . - ISSN 1863-8880. - ISSN 1863-8899, DOI 10.1002/lpor.202401089.
Аннотация:<jats:title>Abstract</jats:title><jats:p>β-Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> phosphors show good optical properties for highly symmetric lattices and dense frameworks. Here, an abnormal lattice shrinkage phenomenon is found in BaMg<jats:sub>1-x</jats:sub>Zn<jats:sub>x</jats:sub>Al<jats:sub>9.8</jats:sub>O<jats:sub>17</jats:sub>: Cr<jats:sup>3+</jats:sup> (BM<jats:sub>1-x</jats:sub>Z<jats:sub>x</jats:sub>A: Cr<jats:sup>3+</jats:sup>) phosphors, which can be attributed to the variation in the covalency of the chemical bond. Accordingly, the denser crystal structure caused by the abnormal shrinkage improves the luminescent intensity (67%↑) and the thermal stability (69%→76%@150 °C). Internal/external quantum efficiency (IQE/EQE) of BZA: 0.2Cr<jats:sup>3+</jats:sup> reaches 95% and 52.7%, respectively. In addition, the preferential occupation of the Cr<jats:sup>3+</jats:sup> ion is discussed through the crystal field strength calculation, low-temperature spectra, and fluorescent lifetime. The unique spectrum of the phosphor derives from the occupation of Cr<jats:sup>3+</jats:sup> on the octahedral sites (Al4 and Al1) and the formation of Cr<jats:sup>3+</jats:sup>-Cr<jats:sup>3+</jats:sup> coupling pairs. Finally, the high matching rate between the absorption curve of plant pigment P<jats:sub>fr</jats:sub> and the EL spectrum of the as-prepared pc-LED expresses that it can be applied in plant lighting.</jats:p>
Держатель оригинала документа:College of Agronomy Hunan Agricultural University Changsha 410128 P. R. China, College of Bioscience and Biotechnology Hunan Agricultural University Changsha 410128 P. R. China, Departament of Physics and Technical Sciences Western Caspian University Baku AZ 1001 Azerbaijan, Hunan Optical Agriculture Engineering Technology Research Center Changsha 410128 P. R. China, Laboratory of Crystal Physics Kirensky Institute of Physics Federal Research Center KSC SB RAS Krasnoyarsk 660036 Russia, School of Chemistry and Materials Science Hunan Agricultural University Changsha 410128 P. R. China, School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China, Siberian Federal University Krasnoyarsk 660041 Russia
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