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首页> 外文期刊>Nanotechnology >Two-dimensional CsPbBr3/PCBM heterojunctions for sensitive, fast and flexible photodetectors boosted by charge transfer
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Two-dimensional CsPbBr3/PCBM heterojunctions for sensitive, fast and flexible photodetectors boosted by charge transfer

机译：用于敏感，快速和柔性的光电探测器的二维CSPBBR3 / PCBM异电功能，通过电荷转移提升

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摘要

Inorganic halide perovskites exhibited promising potentials for high-performance wide-band photodetectors (PDs) due to their high light absorption coefficients, long carrier diffusion length and wide light absorption ranges. Here, we report two-dimensional (2D) CsPbBr3/PCBM heterojunctions for sensitive, fast and flexible PDs, whose performances can be greatly boosted by the charge transfer through the energy-aligned interface. The 2D CsPbBr3 nanosheets with high crystallinity were fabricated via a simple solution-process at room temperature, and then assembled into flexible heterojunctions films with polymerphenyl-C61-butyric acid methyl ester (PCBM). Significantly, the efficient and fast charge transfer at the heterojunctions interface was evidenced by the obvious photoluminescence quenching and variation of recombination dynamics. Subsequently, such heterojunctions PD exhibited an enhanced responsivity of 10.85 AW(-1) and an ultrahigh detectivity of 3.06 x 10(13) Jones. In addition, the PD shows a broad linear dynamic range of 73 dB, a fast response speed with rise time of 44 mu s and decay time of 390 mu s, respectively. Moreover, the PD lying on polyethylene terephthalate substrates exhibited an outstanding mechanical flexibility and a robust electrical stability. These results could provide a new avenue for integration of 2D perovskites and organic functional materials and for high-performance flexible PDs.
机译：无机卤化物钙钛矿显示出高性能宽带光电检测器（PDS）有为电位由于其高的光吸收系数，长载流子扩散长度和宽的光吸收范围。在这里，我们报告了用于敏感，快速和柔性PD的二维（2D）CSPBBR3 / PCBM异电功能，其性能可以通过电荷传输通过能量对准界面来大大提升。通过在室温下通过简单的溶液 - 方法制造具有高结晶度的2D CSPBBR3纳米片，然后用聚合物聚合物-C61-丁酸甲酯（PCBM）组装成柔性异质蛋白膜。值得注意的是，通过明显的光致发光淬火和重组动力学的变化，证明了异质通红界面的有效和快速电荷转移。随后，这种异质结PD增强了10.85 AW（-1）的响应度，以及3.06×10（13）琼斯的超高探测率。另外，PD显示出73dB的宽线性动态范围，快速响应速度，其上升时间为44μs和390μs的衰减时间。此外，躺在聚对苯二甲酸乙二醇酯基材上的PD表现出优异的机械柔韧性和稳健的电稳定性。这些结果可以为2D钙钛矿和有机功能材料的整合和高性能柔性PD提供新的途径。

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  • 来源
    《Nanotechnology》 |2018年第8期|共9页
  • 作者

    Shen Yalong; Yu Dejian; Wang Xiong; Huo Chengxue; Wu Ye; Zhu Zhengfeng; Zeng Haibo;

  • 作者单位

    Nanjing Univ Sci &

    Technol Coll Mat Sci &

    Engn Inst Optoelect &

    Nanomat MIIT Key Lab Adv Display Mat &

    Devices Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Coll Mat Sci &

    Engn Inst Optoelect &

    Nanomat MIIT Key Lab Adv Display Mat &

    Devices Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Coll Mat Sci &

    Engn Inst Optoelect &

    Nanomat MIIT Key Lab Adv Display Mat &

    Devices Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Coll Mat Sci &

    Engn Inst Optoelect &

    Nanomat MIIT Key Lab Adv Display Mat &

    Devices Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Coll Mat Sci &

    Engn Inst Optoelect &

    Nanomat MIIT Key Lab Adv Display Mat &

    Devices Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Coll Mat Sci &

    Engn Inst Optoelect &

    Nanomat MIIT Key Lab Adv Display Mat &

    Devices Nanjing 210094 Jiangsu Peoples R China;

    Nanjing Univ Sci &

    Technol Coll Mat Sci &

    Engn Inst Optoelect &

    Nanomat MIIT Key Lab Adv Display Mat &

    Devices Nanjing 210094 Jiangsu Peoples R China;

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

    two-dimensional materials; inorganic halide perovskites; photodetectors; heterojunctions; charge transfer;

    机译：二维材料;无机卤化物蠕动;光电探测器;异性结;电荷转移;

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