Zhang Dan, Zhang Xiangting, An Zhengce, Dong Rujia, Shi Zhan, Song Yanhua, Zou Haifeng
College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, People's Republic of China.
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, People's Republic of China.
Inorg Chem. 2020 Oct 5;59(19):14193-14206. doi: 10.1021/acs.inorgchem.0c01980. Epub 2020 Sep 25.
Here, the crystal structure, phase analysis, site occupancy, and luminescence properties of NCMP:Eu,Tb,Mn have been studied for the first time. Under 335 nm ultraviolet excitation, the NCMP:Eu phosphors show narrow-band blue emission. In addition, we discuss the reason for a continuous red shift for the emission spectra of NCMP:Eu by raising the value. The efficient ET processes of Eu → Tb and Eu → Mn were investigated by the luminescence spectra and decay curves. The ET efficiencies reach 92.58% at = 0.15 for NCMP:0.01Eu,Tb and 99.85% at = 0.15 for NCMP:0.01Eu,Mn phosphors, respectively. The efficient energy transfer processes greatly improve the quantum efficiency, luminous intensity, and thermal stability. Bright green and red emissions can be realized through changing the related ratio of Eu, Tb, and Mn. In addition, the excellent performance of the prepared white LED lamps utilizing a 385 nm chip combined with our prepared NCMP:Eu,Tb/Mn phosphors indicates that NCMP:0.01Eu,Tb and NCMP:0.01Eu,Mn phosphors can be potential green and red phosphors for white LEDs.
在此，首次对NCMP:Eu、Tb、Mn的晶体结构、相分析、占位情况和发光性能进行了研究。在335nm紫外激发下，NCMP:Eu荧光粉呈现窄带蓝光发射。此外，我们讨论了通过提高 值使NCMP:Eu发射光谱发生连续红移的原因。通过发光光谱和衰减曲线研究了Eu→Tb和Eu→Mn的有效能量转移过程。对于NCMP:0.01Eu、Tb荧光粉，当 = 0.15时能量转移效率达到92.58%；对于NCMP:0.01Eu、Mn荧光粉，当 = 0.15时能量转移效率达到99.85%。有效的能量转移过程极大地提高了量子效率、发光强度和热稳定性。通过改变Eu、Tb和Mn的相关比例可以实现明亮的绿色和红色发射。此外，利用385nm芯片与我们制备的NCMP:Eu、Tb/Mn荧光粉制备的白光LED灯表现优异，这表明NCMP:0.01Eu、Tb和NCMP:0.01Eu、Mn荧光粉可能是白光LED潜在的绿色和红色荧光粉。
