CuS半导体纳米盘合成及光学性能研究  

Contronable synthesis and optical properties of semiconductor CuS nanoplates

作　　者：张妮伟 王成 柳维端 雷险峰 赵江 黄浩 张翔晖[1] 胡永明[1] 李岳彬[1] ZHANG Niwei;WANG Cheng;LIU Weiduan;LEI Xianfeng;ZHAO Jiang;HUANG Hao;ZHANG Xianghui;HU Yongming;LI Yuebin(Faculty of Physical and Electronic Sciences,Hubei University,Wuhan 430062,China)

机构地区：[1]湖北大学物理与电子科学学院

出　　处：《湖北大学学报（自然科学版）》2020年第1期61-66,71,共7页Journal of Hubei University：Natural Science

基　　金：国家自然科学基金(51173038,51303046);教育部博士点专项科研基金(20114208130001)资助

摘　　要：采用高温有机相合成CuS纳米盘,并采用透射电子显微镜、X线衍射仪、紫外可见分光光度计和X线光电子能谱仪分析其形貌、晶相、电子能级结构和光学性质.采用Drude模型,计算分析CuS纳米盘空穴浓度为5.5×10^21 cm^-3,在入射光的作用下产生的局域表面等离子体共振是CuS近红外吸收的主要来源.通过时域有限差分数值方法模拟研究发现CuS纳米盘结构中存在面内和面外两种表面等离激元共振模式,且面内模式对NIR吸收贡献最大,局域场的增强是面外模式结果的3倍,在未来的NIR光电器件性能增强领域具有重要应用前景.CuS nanodisks were synthesized by High-Temperature-Boiling-Point organic solvent.The morphologies,crystal phase,electronic energy level structure and optical properties were further characterized and analyzed by transmission electron microscopy,X-ray diffractometry,UV-Vis-NIR absorption spectroscope and X-ray photoelectron spectroscopy.The concentration of holes is estimated by Drude model to be about 5.5×10^21 cm^-3,which were the origin of the NIR localized surface plasmon resonance(LSPR).The results of Finite-Difference-Time-Domain simulation revealed that there were two LSPR modes within CuS nanodisks:in plane and out plane modes.The in-plane mode resonance was the major contributor of the NIR absorption,and the local electric field distribution was about 3 times of that of out-plane mode.The results demonstrated that the CuS nanodisks exhibited strong LSPR performance,showing great potential in future NIR optoelectrical devices.

关 键 词：CuS纳米盘 表面等离子体共振 时域有限差分 局域场增强模板 

分 类 号：TB324.1[一般工业技术—材料科学与工程]