Тип публикации: статья из журнала

Год издания: 2024

Идентификатор DOI: 10.1016/j.jallcom.2024.174112

Аннотация: Bi3+-activated phosphors have been proven to have potential applications foreground in white light-emitting diodes (WLED), plant growth lamps and temperature sensing. Therefore, it is urgent to exploit high-efficiency Bi3+-activated phosphors. Herein, a novel broadband yellow-emitting phosphor Ba2GdGaO5:Bi3+ with high internal quanПоказать полностьюtum efficiency (IQE = 77%) was obtained based on metal to metal charge transfer (MMCT) between Bi3+ ground state and Gd3+ excited states. The photoluminescence excitation (PLE) spectrum and photoluminescence (PL) spectrum range from 225 nm to 400 nm and 400 nm to 700 nm, respectively, which can avoid the reabsorption phenomenon efficiently. Besides, Ba2GdGaO5:Bi3+ has superior thermal stability and it shows zero-thermal-quenching at 150 °C. The K+ doping hardly changes the thermal stability and can improve the PL intensity to 133.1% when the K+ concentration is 2%. Finally, a phosphor-convert WLED (pc-WLED) was simply synthesized by Ba2GdGaO5:Bi3+ and BaMgAl10O17:Eu2+ (BAM:Eu2+) phosphors. The doping of Eu3+ can significantly enhance the color rendering index (CRI, from 88.1 to 91.5) and reduce the correlated color temperature (CCT, from 4911 K to 4014 K). The above experimental results demonstrated that the phosphor has great application prospect in WLED.

Журнал: Journal of Alloys and Compounds

Выпуск журнала: Т. 986

Номера страниц: 174112

ISSN журнала: 09258388

Издатель: Elsevier Science Publishing Company, Inc.

• Chen Ke (School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China)
• Gao Peixin (School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China)
• Zhang Zengtao (School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China)
• Ma Yibiao (School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China)
• Luo Zan (School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China)
• Molokeev Maxim S. (World-Class Research Center "Advanced Digital Technologies", University of Tyumen, Tyumen 625003, Russia)
• Zhou Zhi (School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China)
• Xia Mao (School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, PR China)

• Ядро РИНЦ (eLIBRARY.RU)