Luminescence studies on Al4B2O9:Eu2+ phosphor crystals

作者：Zheng, Yingli; Chen, Donghua^*

来源：Luminescence, 2011, 26(6): 481-485.

DOI：10.1002/bio.1256

• aluminum borate
• X-ray diffraction
• blue-emitting phosphor
• nanoparticles
• luminescence

A novel blue-emitting phosphor, Eu2+-doping Al4B2O9, was prepared via a modified solid-state reaction. Al4B2O9:Eu2+ nanoparticles with diameters varying in a range from 20 to 50 nm were obtained using urea as an auxiliary reagent at the optimum temperature of 850 degrees C. The crystallization and particle sizes of Al4B2O9:Eu2+ were investigated using powder X-ray diffraction (XRD) and transmission electron microscopy (TEM). Photoluminescence (PL) results showed that Al4B2O9:Eu2+ phosphor could be efficiently excited by the ultraviolet region from 240 to 410 nm, exhibiting bright blue emission. Further investigation on concentration-dependent emission spectra indicated that the Al3.997B2O9:Eu-0.003(2+) phosphor exhibited the strongest luminescent, and the relative PL intensity decreased with increasing Eu2+ concentration due to concentration quenching. In addition, the concentration quenching for the one-Eu-site emission centers was caused by the electric multipolemultipole interaction.

• 出版日期2011-12
• 单位中南民族大学