碳泡沫衬底上氮化铝纳米线的生长及其光致发光特性研究

程赛; 吕惠民; 石振海; 崔静雅

西安理工大学应用物理系,西安,710048

西安理工大学应用化学系,西安,710048

Growth and photoluminescence character research of aluminum nitride nanowires upon carbon foam substrate

摘要: 为了简化A1N／C复合泡沫材料的制备流程，本文采用复分解反应法制备A1N纳米材料，并通过800°C退火处理使其在碳泡沫衬底上重结晶为六方相A1N纳米线．通过形貌表征测试，纳米线为表面光滑的长直形圆柱体，直径约50nm，长度10μm以上，在碳微球表面沿[001]方向生长．同时，采用VLS生长机理对纳米线的生长进行了解释．对样品光致发光谱的研究表明。中心波长423nm处存在一尖锐发光峰且随温度升高发生明显的红移现象，系C替N杂质能级跃迁发光所致．样品在紫光波段具有良好的光致发光特性，有望应用于光探测器领域．

关键词:

Abstract: To simplify preparation process of A1N/C composite foam, A1N nanomaterials are prepared via double decomposition reaction and then 800 °C annealing process to recrystallize hexagonal A1N （h-A1N） nanowires on carbon foam substrate. Fore the morphology characterization it follows that, h-A1N nanowires with straight cylindrical morphology grow along the [001]direction on carbon micro- spheres surface and are about 50 nm in diameter and several micrometers in length. Meanwhile, the growth mechanism of nanowire is interpreted as vapor-liquid-solid（VLS） process. The photoluminescence（PL） spectrum of as-prepared sample is also researched, and the results show that a sharp photoluminescence peak appears at 423 nm and shifts toward the red side with temperature increasing. The peak is attributed to the transition luminescence, owing to the substitution of C for N impurity energy level. The sample has good PL character in purple light band and is potential to be used in the photodetector field.

碳泡沫衬底上氮化铝纳米线的生长及其光致发光特性研究

西安理工大学应用物理系,西安,710048

西安理工大学应用化学系,西安,710048

关键词:

Growth and photoluminescence character research of aluminum nitride nanowires upon carbon foam substrate

西安理工大学应用物理系,西安,710048

西安理工大学应用化学系,西安,710048

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