A series of Dy³⁺ and Eu³⁺ ion doped Bi₂SiO₅ nanophosphors were synthesized by hydrothermal method. A comprehensive structural and optical characterization were performed using various techniques including powder X-ray diffraction, UV-Infrared absorption, photoluminescence, time-resolved luminescence technique etc. Crystalline size of the synthesized nanophosphors was found to be ∼25 nm, depending on the doping concentration of the active ions. Under the blue light excitations (386 nm and 393 nm) the Dy³⁺:Bi₂SiO₅ and Eu³⁺:Bi₂SiO₅ nanophosphors yield characteristic yellowish white light and yellow/red emissions, respectively. In binary co-doped, Dy:Eu:Bi₂SiO₅, excitation of individual ion results from another doped ion, in addition to the emission from resonantly excited ion. Observation of emission from acceptor ions, confirm the effective mutual interaction between the doped ions and existence of two-way energy transfer process. Various energy transfer parameters including the rate of energy transfer efficiency were estimated. A predominate multipole interaction was concluded for the energy transfer through multichannel interaction which yield white light on 350 nm and 386 nm excitations. CIE coordinates were estimated for various excitations which fall well within the gamut of white light.

通过水热法合成了一系列Dy ³⁺和Eu ³⁺离子掺杂的Bi ₂ SiO ₅纳米磷光体。使用各种技术进行了全面的结构和光学表征，包括粉末X射线衍射，UV红外吸收，光致发光，时间分辨发光技术等。根据掺杂情况，发现合成的纳米磷光体的晶体尺寸为〜25 nm。活性离子的浓度。在蓝光激发下（386 nm和393 nm），Dy ³⁺：Bi ₂ SiO ₅和Eu ³⁺：Bi ₂ SiO ₅纳米磷光体分别产生特征性的淡黄色白光和黄色/红色发射。在二元共掺杂的Dy：Eu：Bi ₂ SiO _5中，除了来自共振激发离子的发射之外，单个离子的激发还来自于另一种掺杂离子。观察受体离子的发射，确认掺杂离子之间的有效相互作用以及双向能量传递过程的存在。估算了各种能量传递参数，包括能量传递效率的比率。总结了通过多通道相互作用进行能量转移的主要多极相互作用，该相互作用在350 nm和386 nm激发下产生白光。估计了各种激发的CIE坐标，这些激发完全落在白光的色域内。