【摘要】 利用氨气源分子束外延 ( GSMBE)技术 ,在改型 型分子束外延设备上生长高质量 Ga N单晶外延材料 ,并对样品进行了光致发光测量。分析室温和低温光致发光谱 ,系统地研究 Ga N的发光峰及其起源 ,并对常见的黄色发光带现象及其微结构起因进行探讨。更多还原

【Abstract】 The high quality GaN epilayers grown on (0001) sapphire substrates using a modified home-made gas source MBE system are investigated by room and low temperature photoluminescence(PL).The origins of the different peaks in the PL spectra of the high quality GaN films are systematically analyzed,and the origin of always observed strong yellow luminescence centered at 2.2eV is studied.更多还原