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Charge carrier transfer in tungsten disulfide-black phosphorus heterostructures

机译：钨硫化物 - 黑色磷异质结构的电荷载体转移

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摘要

Photocarrier dynamics in tungsten disulfide-black phosphorus (BP) heterostructures were studied by time-resolved differential reflection measurements. The heterostructures were fabricated by stacking together monolayer WS2 and BP flakes that are both fabricated by mechanical exfoliation. Efficient and ultrafast transfer of photocarriers from WS2 to BP flakes was observed. This confirms the type-I band alignment of WS2/BP heterostructures that was predicted by theory. Accompanied with the photocarrier interlayer transfer process from WS2 to BP flakes, the change of the absorption of WS2 persists for several nanoseconds. These results promote the consciousness about the carrier dynamics of interlayer transfer process in van der Waals heterostructures and its application in optoelectronic devices.
机译：通过时间分辨的差分反射测量研究了钨二硫化物 - 黑色磷（BP）异质结构的光载体动力学。 通过将单层WS2和BP薄片堆叠在一起通过机械剥离制造的单层WS2和BP薄片制造异质结构。 观察到从WS2到BP薄片的光燃料的高效和超快转移。 这证实了通过理论预测的WS2 / BP异质结构的I频带对准。 伴随着从WS2到BP薄片的光载体层间转移过程，WS2的吸收的变化持续了几个纳秒。 这些结果促进了van der Waals异质结构中层间转移过程的载体动力学的意识及其在光电器件中的应用。

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  • 来源
    《Nanotechnology》 |2017年第47期|共7页
  • 作者

    Zhao Siqi; He Dawei; Wang Yongsheng; Zhang Xinwu; He Jiaqi;

  • 作者单位

    Beijing Jiaotong Univ Inst Optoelect Technol Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Inst Optoelect Technol Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Inst Optoelect Technol Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Inst Optoelect Technol Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Inst Optoelect Technol Minist Educ Key Lab Luminescence &

    Opt Informat Beijing 100044 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    tungsten disulfide; black phosphorus; photocarrier; heterostructures;

    机译：二硫化钨;黑色磷;光载体;异质结构;

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