Photoluminescence of Mg—doped GaN with Different Mg Concentrations after Annealing at Different Temperatures |
| |
引用本文: | 周晓滢,孙长征,郭文平,胡卉,罗毅.Photoluminescence of Mg—doped GaN with Different Mg Concentrations after Annealing at Different Temperatures[J].中国物理快报,2003,20(7):1137-1140. |
| |
作者姓名: | 周晓滢 孙长征 郭文平 胡卉 罗毅 |
| |
作者单位: | DepartmentofElectronicEngineering,StateKeyLaboratoryonIntegratedOptoelectronics,Tsinghuauniversity,Beijing100084 |
| |
摘 要: | The blue band (BB) in low temperature photoluminescence of Mg-doped GaN films with different Mg concentrations is investigated.The BB peak of as-grown samples with higher Mg concentration centres at lower energy.A shift of the BB peak energy is observed after annealing in N2 at different temperatures,meanwhile,the difference between the BB peak energy is observed after annealing in N2 at different temperatures.Meanwhile,the difference between the BB peak energies diminishes for raised annealing temperature,and the BB peaks for different samples converge to 2.92eV after annealing at 850℃.These experimental results can be accounted for by a model based on compensation effect.The shift of BB lines provides a useful criterion for the optimum annealing temperature of the Mg-doped GaN material,and the value is taken to be 850℃ in our case.
|
关 键 词: | GaN Mg 氮化镓 镁掺杂 光致发光 退火温度 半导体材料 |
本文献已被 维普 等数据库收录! |
|