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Superior QuantumEfficiencyBlue-EmittingPhosphors with HighThermal Stabilitytoward MultipurposeLED Applications Gai ShujieGao PeixinChen Ke2024 год

Superior Quantum Efficiency Blue-Emitting Phosphors with High Thermal Stability toward Multipurpose LED Applications
статья из журнала

Дополнительные ссылки: eLibrary
База данных: Каталог библиотеки СФУ
Библиографическое описание: Superior Quantum Efficiency Blue-Emitting Phosphors with High Thermal Stability toward Multipurpose LED Applications : научное издание / S. S. Gai [et al.]. - Текст : непосредственный // Advanced Optical Materials. - 2024. - № . - ISSN 2195-1071, DOI 10.1002/adom.202302870.
Аннотация: <jats:title>Abstract</jats:title><jats:p>Since Bi<jats:sup>3+</jats:sup>-activated phosphor are widely reported in phosphors-converted light-emitting diodes (pc-LEDs), developing new-high efficiency phosphors is imperative. Herein, superior internal quantum efficiency (IQE = 93.7%) and external quantum efficiency (EQE = 70.5%) are achieved with blue-emitting gallate phosphor CaGdGaO<jats:sub>4</jats:sub>:Bi<jats:sup>3+</jats:sup>. Particularly, the photoluminescence excitation (PLE) spectrum ranges from 200 to 400 nm with two peaks at 337 and 368 nm, which match well with the 365 nm near ultraviolet (n-UV) chip. The blue emission is attributed to two luminescence centers caused by Bi<jats:sup>3+</jats:sup> occupying GdO<jats:sub>6</jats:sub> and CaO<jats:sub>6</jats:sub> sites. Furthermore, the thermal stability (@ 150 °C) enhanced from 73.2% to 80.1% when Ca<jats:sup>2+</jats:sup> doping. A white LED (WLED) with high color rendering index (Ra) of 93.8 is prepared by as-synthesized phosphors, indicating the potential application in WLED. The blue and red dual-emitting phosphors are achieved by co-doping Bi<jats:sup>3+</jats:sup> and Eu<jats:sup>3+</jats:sup>. Finally, the rice planting experiment presents that the blue-emitting can efficiently enhance the photosynthesis and seeding index of rice, which indicated these phosphors have significance in plant fill light.</jats:p>
Год издания: 2024
Авторы: Gai Shujie , Gao Peixin , Chen Ke , Tang Chengzhu , Zhao Yuanyuan , Wei Jiaqi , Zhang Ye , Molokeev Maxim S. , Xia Mao , Zhou Zhi
Источник: Advanced Optical Materials
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, Hunan Optical Agriculture Engineering Technology Research Center Changsha 410128 P. R. China, School of Chemistry and Materials Science Hunan Agricultural University Changsha 410128 P. R. China, World-Class Research Center “Advanced Digital Technologies” University of Tyumen Tyumen 625003 Russia
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