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在复合衬底γ-Al_2O_3/Si(001)上生长GaN 被引量:1

Growth of GaN on γ-Al_2O_3/Si(001) Composite Substrates
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摘要 采用分子束外延(MBE)生长方法,使用γAl2O3材料作为新型过渡层,在Si(001)衬底上获得了没有裂纹的GaN外延层,实验结果表明使用γAl2O3过渡层有效地缓解了外延层中的应力.通过生长并测试分析几种不同结构的外延材料,研究了复合衬底γAl2O3/Si(001)生长GaN情况,得到了六方相GaN单晶材料,实现了GaNc面生长.预铺薄层Al及高温AlN层可以提高GaN晶体质量,低温AlN缓冲层可以改善GaN表面的粗糙度.为解决Si(001)衬底上GaN的生长问题提供了有益的探索. Crack-free GaN epilayers on Si(001) substrates are obtained by molecular beam epitaxy with novel γ-Al2O3 materials as intermediate layers. GaN growth along c-director is realized and a hexagonal single crystalline GaN is achieved. Experimental results indicate that pretreatment with Al and a high temperature AlN layer can improve the quality of GaN and a low temperature AlN layer can improve the surface roughness of GaN. This provides an effective method to overcome the difficulties of GaN growth on Si(001)substrates.
出处 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2005年第12期2378-2384,共7页 半导体学报(英文版)
基金 中国科学院创新工程重要方向性项目 国家自然科学基金重点项目(批准号:60136020) 国家重点基础研究发展规划(批准号:G20000683和2002CB311903) 国家高技术研究发展规划(批准号:2004AA311040)资助项目~~
关键词 GAN MBE Γ-AL2O3 缓冲层 GaN γ-Al2O3/Si(O01) buffer MBE
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参考文献21

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共引文献38

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