β-Ga2O3纳米材料的尺寸调控与光致发光特性  

Size Regulation and Photoluminescence Properties of β-Ga2O3 Nanomaterials

作　　者：马腾宇 李万俊 何先旺 胡慧 黄利娟 张红 熊元强 李泓霖 叶利娟 孔春阳 Ma Teng-Yu;Li Wan-Jun;He Xian-Wang;Hu Hui;Huang Li-Juan;Zhang Hong;Xiong Yuan-Qiang;Li Hong-Lin;Ye Li-Juan;Kong Chun-Yang(Chongqing Key Laboratory of Photo-Electric Functional Materials,College of Physics and Electronic Engineering,Chongqing Normal University,Chongqing 401331,China)

机构地区：[1]重庆师范大学物理与电子工程学院,光电功能材料重庆市重点实验室,重庆401331

出　　处：《物理学报》2020年第10期214-224,共11页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:11904041,51472038);重庆市教育委员会科学技术研究项目(批准号:KJQN201900542);重庆师范大学大学生创新创业训练计划项目(批准号:201910637006)资助的课题.

摘　　要：氧化镓(Ga2O3)纳米材料在紫外透明电极、高温气体传感器、日盲紫外探测器和功率器件等领域具有巨大的应用潜力,而实现高结晶质量和尺寸形貌可控的Ga2O3纳米材料是关键.本文通过水热法制备了不同尺寸的羟基氧化镓(GaOOH)纳米棒、纳米棒束和纺锤体,经后期高温煅烧均成功转变为高质量单晶β-Ga2O3纳米材料并较好地保留了原始GaOOH的形态特征.利用X射线衍射(XRD)、拉曼散射光谱(Raman)和场发射扫描电子显微镜(FE-SEM)等表征手段系统研究了前驱液的pH值大小和阴离子表面活性剂浓度对GaOOH和β-Ga2O3纳米材料晶体结构和表面形貌的影响,并深入探讨了不同条件下GaOOH纳米材料的生长机制.此外,室温光致发光谱(PL)测试发现不同形貌的β-Ga2O3纳米材料均展现出典型的蓝绿色发射峰和尖锐的红光发射峰,与纳米材料中本征缺陷的存在密切相关.上述研究结果为未来实现高质量β-Ga2O3纳米材料的可控制备提供了有益参考.Gallium oxide(Ga2 O3) nanomaterials have great potential in the fields of ultraviolet transparent electrodes,high-temperature gas sensors,solar blind ultraviolet detectors and power devices,while achieving Ga2 O3 nanomaterials with high crystalline quality and controllable size and morphology still remains challenge.Herein,size-controllable Gallium oxide hydroxide(GaOOH) nanorods,nanorod bundles,and spindles were prepared by hydrothermal method.After high temperature calcination,GaOOH nanomaterials were successfully transformed into higher-quality single-crystal β-Ga2 O3 nanomaterials which well retained the morphological characteristics of the pristine GaOOH.With the help of X-ray diffraction(XRD),Raman scattering spectroscopy(Raman) and field emission scanning electron microscope(FE-SEM),we systematically studied the influence of the pH value and the concentration of anionic surfactants in the precursor solution on the crystal structure and surface morphology of GaOOH and β-Ga2 O3 nanomaterials,and explored the different growth mechanism of GaOOH nanomaterials under different conditions.Simultaneously,room temperature p ho to lumines cence(PL) tests revealed that β-Ga2 O3 nanomaterials with different morphologies exhibit typical broad blue-green emission and sharp red emission,which are closely related to the existence of intrinsic defects in nanomaterials.The above research results provide valuable information for the controllable preparation of high-quality β-Ga2 O3 nanomaterials.

关 键 词：β-Ga2O3 纳米材料 尺寸调控 光致发光 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TN383.1[电子电信—物理电子学]