Cubic Nitride Semiconductor Heterostructures and Their Application to Optical and Electronic Devices

立方氮化物半导体异质结构及其在光学和电子器件中的应用

• 批准号: 12555002
• 负责人: ONABE Kentaro
• 金额: $ 8.51万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555002/
• 关键词: nitride semiconductors; cubic nitride semiconductors; cubic gallium nitride; cubic indium nitride; MOVPE; RF-MBE; photoreflectance; heterostructure; 窒化物混晶半導体; GaAsN; 立方晶GaN; 立方晶AlGaN; GaN; GaAs; MBE; 選択成長; 立法晶GaN; 立法晶AlGaN; 深い準位

This research project has demonstrated the feasibility of practical device application of cubic phase nitride semiconductors and heterostructures. As for the GaN thin films on GaAs substrates, high quality cubic GaN epitaxial films that contains hexagonal GaN less than 1 % have been attained by improvement of metal-organic vapor phase epitaxy (MOVPE) growth technique including adoption of GaN intermediate layers and arsenic overpressures in the growth process. High quality cubic GaN films showed a highly luminescent optical property without deep-level luminescence coming from crystal defects. Microscopic structural analyses revealed the details of hexagonal phase generation in cubic GaN films. Si doping has been successful to realize high-conductivity n-type electrical conduction. Selective-area growth of cubic GaN films using fine lithography stripe mask patterns has given a superior quality cubic GaN when the stripe orientation is along the proper crystal orientation. Detailed characterization of cubic GaN/GaAs heterointerface using photoconductivity and electroreflectance clarified the existence of parallel conduction path due to the specific band-line up of the heterostructure. Molecular-beam epitaxy (MBE) using rf-plasma nitrogen source gave cubic GaN and InN films on GaAs with comparable quality with MOVPE-grown films. These achievements shows a possibility of practical applications of cubic nitride semiconductors.

本研究项目论证了立方相氮化物半导体及其异质结在实际器件应用中的可行性。对于在GaN衬底上生长的GaN薄膜，通过改进金属-有机气相外延(MOVPE)生长工艺，包括采用GaN中间层和生长过程中的砷超压，获得了质量分数小于1%的GaN立方外延薄膜。高质量的立方GaN薄膜在没有晶体缺陷产生的深能级发光的情况下，表现出了很高的发光性能。微观结构分析揭示了立方GaN薄膜中六方相产生的细节。硅掺杂已经成功地实现了高电导率的n型电导。采用精细光刻条纹掩模图形的选择区域生长立方GaN薄膜，当条纹取向沿合适的晶体取向时，可以获得高质量的立方GaN薄膜。利用光电导和电学反射对立方GaN/GaAs异质结界面进行了详细的表征，证实了由于异质结特殊的带状排列，存在平行的导电路径。利用射频等离子体氮源的分子束外延(MBE)技术在GaAs衬底上生长出了质量与MOVPE相当的立方GaN和InN薄膜。这些成果为立方氮化物半导体的实际应用提供了可能。

项目成果

R.Katayama, M.Kuroda, K.Onabe, Y.Shiraki: "Electrically biased photorefectance study of cubic GaN/GaAs(001) heterointerface"phys.scat.sol.(c). 0(7). 2597-2601 (2003)

R.Katayama、M.Kuroda、K.Onabe、Y.Shiraki：“立方 GaN/GaAs(001) 异质界面的电偏光反射研究”phys.scat.sol.(c)。

J.Wu: "Effect of an Intermediate Layer on Cubic GaN Grown on GaAs (100): Substrate Protection and Strain Relaxation"IPAP Conf.Series. 1. 85-88 (2000)

J.Wu：“中间层对在 GaAs (100) 上生长的立方 GaN 的影响：衬底保护和应变松弛”IPAP Conf.系列。

A.Nishikawa: "MBE Growth and Photoreflectance Study of GaAsN Alloy Films Grown on GaAs (001)"Journal of Crystal Growth. Vol.251,No.1-4. 427-431 (2003)

A.Nishikawa：“GaAs (001) 上生长的 GaAsN 合金薄膜的 MBE 生长和光反射研究”晶体生长杂志。

K.Onabe: "Cubic-GaN Films on GaAs (001) Substrates without Deep-Level Luminescence Grown by Metalorganic Vapor Phase Epitaxy"phys.stat.sol.(a). 180(1). 15-19 (2000)

K.Onabe：“通过金属有机气相外延生长的 GaAs (001) 衬底上的立方氮化镓薄膜，无深能级发光”phys.stat.sol.(a)。

S.Sanorpim: "Detection and Analysis of Hexagonal Phase Generation in Selective Area Growth of Cubic GaN by Low-Pressure Metalorganic Vapor Phase Epitaxy"IPAP Conf.Series. 1. 89-92 (2000)

S.Sanorpim：“低压金属有机气相外延选择性区域生长立方氮化镓中六方相生成的检测和分析”IPAP Conf.系列。