氮化镓基(GaN)光电器件的快速发展,对GaN的质量提出更高的要求,同质外延可以避免由于失配引起的缺陷,厚膜生长是解决GaN体材料生长困难的有效手段.氢化物气相外延(HVPE)是目前最普遍的制备氮化镓厚膜的方法.衬底对于GaN厚膜的影响不可忽视,本文总结了在蓝宝石、碳化硅和铝酸锂衬底上制备GaN厚膜的研究进展,讨论了今后的研究方向.
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