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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.

参考文献

[1] Morkoc H .Comprehensive characterization of hydride VPE grown GaN layers and templates[J].Journal of Materials Science and Technology,2001,33:135.
[2] Namkoong G;Doolittle W A;Brown A S et al.Role of sapphire temperature on GaN growth by plasma assisted molecular beam epitaxy[J].Journal of Applied Physics,2002,99(04):2499.
[3] Grandjean N;Massies J;Leroux M .Nitridation of sapphire effect on the optical properties of GaN epitaxial overlayers[J].Applied Physics Letters,1996,69(14):2071.
[4] Keller S;Keller B P;Wu Y F et al.Influence of sapphire nitridation on properties of gallium nitride grown by metalorganic chemical vapor deposition[J].Applied Physics Letters,1996,68(11):1525.
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