β-Ga_2O_3∶Dy^(3+)荧光粉的快速制备及光学性能研究

Rapid Synthesis and Optical Properties of β-Ga_2O_3∶Dy^(3+)Phosphors

本文用快速微波水热加煅烧的工艺制备了不同Dy3+掺杂浓度的棒状β-Ga2O3∶Dy3+蓝/黄荧光粉。XRD和SEM分析表明Dy3+的掺入使样品的结晶度降低但未对其形貌产生影响。光致发光测试结果表明,β-Ga2O3∶Dy3+的发射峰位于492 nm和580 nm;并且随着Dy3+掺杂量的变化,样品的发射峰强度和蓝光/黄光发射强度比例发生了变化;在Dy3+掺杂量为3mol%时,样品的发射强度达到最大值,蓝光/黄光发射强度比例为59.29%/40.71%。另外,简要分析了GaOOH的生长机理和Dy3+在GaOOH∶Dy3+及β-Ga2O3∶Dy3+中的掺杂机理。

Rod-like β-Ga2O3：Dy3＋ blue/yellow phosphors doped with different concentration of Dy3＋ were synthesized by the rapid microwave hydrothermal and calcination method. Although the crystallization of β-Ga2O3：Dy3＋ samples decreased as the Dy3＋ concentration increasing, the samples＇morphology maintained and were not influeneed by the Dy3＋ concentration under XRD and SEM characterizations. Photol measurement results showed that the emission peaks of β-Ga2O3：Dy3＋ phosphors located at 492 nm （blue） and 580 nm （ yellow）, the intensity of blue/yellow emission varied with Dy3＋ concentrations and showed a maximum when the concentration of Dy3＋ at 3mo1%, the corresponding blue/ yellow ratio was 59.29%/40. 71%. In addition, the probable mechanisms of GaOOH growth and Dy3＋ doping into GaOOH： Dy3＋ and β-Ga2O3：Dy3＋ were analyzed briefly.