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首页> 外文期刊>RSC Advances >Wide channel broadband CH3NH3PbI3/SnS hybrid photodetector: breaking the limit of bandgap energy operation
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Wide channel broadband CH3NH3PbI3/SnS hybrid photodetector: breaking the limit of bandgap energy operation

机译：宽通道宽带CH3NH3PbI3 / SnS混合光电探测器：打破带隙能量运行的极限

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Perovskite-based hybrid organic–inorganic devices have recently demonstrated high potential in optoelectronics. Yet, the preparation of perovskite-based photodetectors over a desired scale without any complex architecture is still challenging. Herein, we proposed a new CH _(3) NH _(3) PbI _(3) /SnS hybrid planar broadband (365 to 850 nm) photodetector, having a wide channel length of 6 mm. The growth of the device was studied by utilizing scanning electron microscopy, energy-dispersive X-ray mapping, X-ray diffraction, and optical spectroscopies. Furthermore, the efficient charge transfer from CH _(3) NH _(3) PbI _(3) to SnS was confirmed by employing time-correlated single photon counting. The pure SnS device generates 0.05 μA photocurrent at 365 nm, 4 mW cm ~(?2) , which is notably enhanced 140 times after embedding with CH _(3) NH _(3) PbI _(3) . Further, the hybrid device shows a significant photoresponse even below the band gaps of individual CH _(3) NH _(3) PbI _(3) or SnS, which matches well with the density functional theory prediction. The observed results will create new opportunities to develop and design a low-cost, broadband, and efficient photodetector over a chosen horizontal area.
机译：基于钙钛矿的混合有机-无机器件最近在光电子领域显示出很高的潜力。然而，在没有任何复杂结构的情况下以期望的规模制备基于钙钛矿的光电检测器仍然具有挑战性。在这里，我们提出了一种新的CH _（3）NH _（3）PbI _（3）/ SnS混合平面宽带（365至850 nm）光电探测器，具有6mm的宽通道长度。通过使用扫描电子显微镜，能量色散X射线绘图，X射线衍射和光学光谱学研究了该器件的生长。此外，通过使用时间相关的单光子计数，可以确认从CH _（3）NH _（3）PbI _（3）到SnS的有效电荷转移。纯SnS器件在365 nm，4 mW cm〜（？2）处产生0.05μA的光电流，在嵌入CH_（3）NH_（3）PbI_（3）之后显着增强140倍。此外，该混合装置甚至在单个CH _（3）NH _（3）PbI _（3）或SnS的带隙以下也显示出显着的光响应，这与密度泛函理论预测非常吻合。观察到的结果将为在选定的水平区域上开发和设计低成本，宽带，高效的光电探测器提供新的机会。

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