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采用Material Studio软件模拟GaN掺杂稀土元素Er~(3+)浓度在6.25%下的晶格结构,分析了掺杂GaN的光学特性,结论表明,掺杂后的GaN具有较好的发光性能.同时,实验上用氨还原法制备了3组掺杂GaN∶Er~(3+)纳米颗粒.3组样品的X射线衍射结果均显示样品结构为六方纤锌矿结构,利用Scherrer公式,计算得到3组样品GaN∶Er~(3+)纳米颗粒的平均晶粒大小为25.9nm;测量了3组样品的GaN∶Er~(3+)纳米颗粒的室温光致发光谱,获得了样品在可见光区(位于375~650nm)的3个发光峰并对3组样品进行分析比较,分析了样品520nm的激发光谱.由光致发光谱得到的3条发光峰表明所制备的GaN∶Er~(3+)具有较好的光学性能.理论和实验上确定了稀土E~(3+)离子掺杂GaN纳米颗粒的较合适的掺杂浓度为6.25%.
The lattice structure of GaN doped with rare earth element Er 3+ at 6.25% was simulated by using Material Studio software. The optical properties of the doped GaN were analyzed. The results show that the doped GaN has good luminescence properties. At the same time, three groups of doped GaN:Er ~ (3+) nanoparticles were prepared by ammonia reduction method.The results of X-ray diffraction of the three samples showed that the sample structure was hexagonal wurtzite structure, and Scherrer’s formula was used to calculate The average grain size of GaN: Er ~ (3+) nanoparticles in three groups of samples was 25.9 nm. The room temperature photoluminescence spectra of GaN: Er ~ (3+) nanoparticles in three groups of samples were measured. (375 ~ 650nm), and analyzed and compared the three groups of samples, the excitation spectrum of the sample was analyzed at 520nm.The three luminescence peaks obtained by the photoluminescence spectrum showed that the prepared GaN: Er3 (3 +) Has better optical properties.It is theoretically and experimentally determined that the suitable doping concentration of rare earth doped E ~ (3+) doped GaN nanoparticles is 6.25%.