研究了衬底氮化过程对于氢化物气相外延(HVPE)方法生长的GaN膜性质的影响.X射线衍射和原子力显微镜以及光荧光测量的结果表明,不同的氮化时间导致Al2O3 表面的成核层发生变化,进一步影响了外延层中的位错密度和应力分布.
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