Abstract The present work reports the properties of CdSiO3 samples co-doped with Gd3+,Cr3+ and Gd3+,Ni2+ presenting white light emission. The samples were prepared by conventional solid-state method and were well crystallized under calcination at 1000 °C for 8 h in open atmosphere. Powders presented sub-micrometric sized particles with low degree of agglomeration. Optical absorption, photoluminescence (emission and decay curves) and thermoluminescence measurements were used to characterize the phosphors. Under excitation at 245 nm, the samples presented white light emission as the result of a three-band spectra. The possible mechanisms of luminescence are discussed, which are attributed to the role of the rare-earth and transition metal ions incorporated as well as the intrinsic defects of the host matrix. The chromaticity coordinates and correlated color temperature values found for CdSiO3:Gd,Ni are very close to the commercial available white emitting diodes.

中文翻译：

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CdSiO3:Gd,TM (TM = Ni, Cr) 荧光粉的白光发射

摘要 目前的工作报告了 CdSiO3 样品与 Gd3+,Cr3+ 和 Gd3+,Ni2+ 共掺杂的性质，呈现白光发射。样品采用常规固态方法制备，并在 1000°C 下在开放气氛中煅烧 8 小时后结晶良好。粉末呈现亚微米尺寸的颗粒，具有低附聚度。光吸收、光致发光（发射和衰变曲线）和热致发光测量用于表征磷光体。在 245 nm 激发下，样品呈现出白光发射，这是三波段光谱的结果。讨论了发光的可能机制，这归因于所掺入的稀土和过渡金属离子的作用以及主体基质的固有缺陷。