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PbSe Nanocrystals Produced by Facile Liquid Phase Exfoliation for Efficient UV-Vis Photodetectors

机译：PBSE纳米晶体由容易液相去角质产生，用于有效的UV-Vis光电探测器

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摘要

Lead selenide (PbSe)-based nanomaterials have been extensively investigated as building blocks for next-generation optoelectronic devices owing to their unique properties. In this work, PbSe nanocrystals (NCs) have been successfully fabricated by a facile liquid phase exfoliation approach and directly applied as active materials for photo-electrochemical (PEC)-type photodetectors (PDs). Taking advantage of broadband absorption and fast carrier dynamics, the PbSe NCs-based PDs exhibit excellent photo-current density (11.88 mu A cm(-2)), photo-responsivity (12.37 mA W-1), response/recovery time (0.12/0.13 s), and long-term cycling stability. The working mechanism of PbSe NCs-based PDs is explored by density functional theory calculations based on their structural and electronic properties under various conditions. It is anticipated that this contribution paves the way to readily fabricate low-dimensional PbSe NCs and extend their practical applications in PEC-type PDs.
机译：基于硒化烯烃（PBSE）的纳米材料被广泛地调查作为下一代光电器件的构建块，由于其独特的特性。 在该作品中，PBSE纳米晶体（NCS）已通过容易液相去角质方法成功制造，并直接用作光电化学（PEC）型光电探测器（PDS）的活性材料。 利用宽带吸收和快速载体动力学，基于PBSE NCS的PDS表现出优异的光电流密度（11.88μm（-2）），光响应率（12.37 mA W-1），响应/恢复时间（0.12 /0.13 s）和长期循环稳定性。 基于PBSE NCS的PDS的工作机制是基于各种条件下的结构和电子性质的密度泛函理论计算探索的。 预计这一贡献可以易于易于制造低维PBSE NCS并在PEC型PD中扩展其实际应用。

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  • 来源
    《Advanced Functional Materials》 |2021年第17期|2010401.1-2010401.12|共12页
  • 作者

    Gao Lingfeng; Wang Rui; Kuklin Artem V.; Zhang Han; Agren Hans;

  • 作者单位

    Shenzhen Univ Inst Microscale Optoelect Collaborat Innovat Ctr Optoelect Sci & Technol Key Lab Optoelect Devices & Syst Minist Educ Shenzhen 518060 Peoples R China|Shenzhen Univ Guangdong Prov Coll Phys & Optoelect Engn Shenzhen Key Lab Micronano Photon Informat Techno Guangdong Lab Artificial Intelligence & Digital E Shenzhen 518060 Peoples R China;

    Peking Univ Sch Phys State Key Lab Mesoscop Phys & Frontiers Sci Ctr Nanooptoelect Beijing 100871 Peoples R China;

    Uppsala Univ Dept Phys & Astron SE-75120 Uppsala Sweden;

    Shenzhen Univ Inst Microscale Optoelect Collaborat Innovat Ctr Optoelect Sci & Technol Key Lab Optoelect Devices & Syst Minist Educ Shenzhen 518060 Peoples R China|Shenzhen Univ Guangdong Prov Coll Phys & Optoelect Engn Shenzhen Key Lab Micronano Photon Informat Techno Guangdong Lab Artificial Intelligence & Digital E Shenzhen 518060 Peoples R China;

    Uppsala Univ Dept Phys & Astron SE-75120 Uppsala Sweden|Henan Univ Coll Chem & Chem Engn Kaifeng 475004 Henan Peoples R China;

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  • 正文语种 eng
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  • 关键词

    liquid phase exfoliation; nanocrystals; transient optical response; photodetector; density functional theory;

    机译：液相去角质;纳米晶体;瞬态光学响应;光电探测器;密度函数理论;

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