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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Tuning Electrical and Raman Scattering Properties of Cadmium Sulfide Nanoribbons via Surface Charge Transfer Doping
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Tuning Electrical and Raman Scattering Properties of Cadmium Sulfide Nanoribbons via Surface Charge Transfer Doping

机译：通过表面电荷转移掺杂调谐硫化镉纳米镉的电气和拉曼散射性能

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摘要

Surface charge transfer doping (SCTD) has emerged as an efficient approach to tune the electrical and optical properties of semiconductor nanostructures. As an important II-VI semiconductor, cadmium sulfide (CdS) nanostructures possess superior optoelectronic properties. However, the SCTD on the CdS nanostructures remains a challenge, and the underlying mechanism for optical property modulation is unclear. Herein, we demonstrate that both the electrical and Raman scattering properties of CdS nanoribbons (NRs) can be tuned by using MoO3 and benzyl viologen (By) as surface dopants. The MoO3 (or By) molecules, which have a high work function (or strong reducing capability), can extract (or inject) electrons from (or into) the CdS NRs because of the large difference in energy levels, leading to electron depletion (or accumulation) within the CdS NRs. By controlling the amount of surface dopants, the electron concentration as well as resistivity of the CdS NRs can be readily modulated. Significantly, Raman scattering properties of the CdS NRs can be fine-tuned due to a strong electron-phonon coupling effect. A mechanism based on the semiclassical-longitudinal-optical-phonon-plasmon theory is first proposed to explain the SCTD-induced Raman scattering modulation. Our findings offer a feasible route for the modulation of the electrical and optical properties of compound semiconductor nanostructures.
机译：表面电荷转移掺杂（SCTD）作为曲调半导体纳米结构的电气和光学性质的有效方法。作为重要的II-VI半导体，硫化镉（CDS）纳米结构具有优异的光电性能。然而，CDS纳米结构上的SCTD仍然是一个挑战，并且光学性能调制的潜在机制尚不清楚。在此，我们证明CDS纳米纤维（NRS）的电气和拉曼散射性能可以通过使用MOO3和苄基VIOLOLOLE（逐苄基VIOLOGEN（BY）作为表面掺杂剂进行调节。具有高功函数（或强降低能力）的MOO3（或逐个）分子可以由于能量水平的差异很大，可以从（或进入）CDS NRS中提取（或注入）电子，从而导致电子耗尽（或在CDS NR中累积）。通过控制表面掺杂剂的量，可以容易地调节电子浓度以及CDS NR的电阻率。值得注意地，由于强电子 - 声子耦合效果，可以微调CDS NRS的拉曼散射特性。首先提出了一种基于SexarCallical-纵向光学 - 镜声象理论的机制来解释SCTD诱导的拉曼散射调制。我们的研究结果提供了一种可行的化合物半导体纳米结构的电气和光学性能的可行途径。

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    Zhang Mi; Shao Zhibin; Jiang Tianhao; Wu Xiaofeng; Zhang Bingchang; Zhang Xiujuan; Xia Feifei; Jie Jiansheng;

  • 作者单位

    Soochow Univ Inst Funct Nano &

    Soft Mat FUNSOM Jiangsu Key Lab Carbon Based Funct Mat &

    Devices Suzhou 215123 Peoples R China;

    Soochow Univ Inst Funct Nano &

    Soft Mat FUNSOM Jiangsu Key Lab Carbon Based Funct Mat &

    Devices Suzhou 215123 Peoples R China;

    Soochow Univ Inst Funct Nano &

    Soft Mat FUNSOM Jiangsu Key Lab Carbon Based Funct Mat &

    Devices Suzhou 215123 Peoples R China;

    Soochow Univ Inst Funct Nano &

    Soft Mat FUNSOM Jiangsu Key Lab Carbon Based Funct Mat &

    Devices Suzhou 215123 Peoples R China;

    Soochow Univ Inst Funct Nano &

    Soft Mat FUNSOM Jiangsu Key Lab Carbon Based Funct Mat &

    Devices Suzhou 215123 Peoples R China;

    Soochow Univ Inst Funct Nano &

    Soft Mat FUNSOM Jiangsu Key Lab Carbon Based Funct Mat &

    Devices Suzhou 215123 Peoples R China;

    Jiangsu Univ Technol Sch Chem &

    Environm Engn Changzhou 213001 Peoples R China;

    Soochow Univ Inst Funct Nano &

    Soft Mat FUNSOM Jiangsu Key Lab Carbon Based Funct Mat &

    Devices Suzhou 215123 Peoples R China;

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  • 正文语种 eng
  • 中图分类 物理化学（理论化学）、化学物理学;
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