Hybrid organic-inorganic perovskite photodetectors have gained significant attention due to their superior potential for optoelectronic applications, offering various advantages such as low-cost processing, high charge carrier mobility, and lightweight properties. However, these perovskite photodetectors exhibit relatively low absorption in the near-infrared (NIR) range, which limits their potential applications. Here, to address this challenge, the integration of gold nanorods (Au NRs) utilizing localized surface plasmon resonance (LSPR) effects in the NIR range has been developed, leading to enhanced light absorption in the active region and higher photocurrent generation. Additionally, ∼7.9 nm of thin polyethyleneimine ethoxylated (PEIE) interlayers were incorporated into the Au NR photodetectors, suppressing dark current by blocking charge injection. As a result, the synergistic effect of the Au NR/PEIE hybrid layer has led to a high-performance photodetector with a responsivity of 0.360 A/W and a detectivity of 1.81 × 1010 Jones, demonstrating a noticeable enhancement compared to the control device. Finite-difference time-domain (FDTD) simulations, morphological characterizations, and photoluminescence studies further support the mechanism for enhancing the performance of the device. We believe that our plasmon-enhanced protocol holds strong potential as a promising platform for perovskite optoelectronic devices.

中文翻译：

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由 Au NR/PEIE 杂化层介导的具有高光电流和低暗电流的等离子体钙钛矿光电探测器


杂化有机-无机钙钛矿光电探测器因其在光电应用中的巨大潜力而受到广泛关注，具有加工成本低、载流子迁移率高和重量轻等各种优势。然而，这些钙钛矿光电探测器在近红外 （NIR） 范围内表现出相对较低的吸收，这限制了它们的潜在应用。在这里，为了应对这一挑战，已经开发了利用 NIR 范围内局部表面等离子体共振 （LSPR） 效应的金纳米棒 （Au NR） 的集成，从而增强了活性区域的光吸收和更高的光电流产生。此外，将 ∼7.9 nm 的聚乙烯亚胺乙氧基化 （PEIE） 薄夹层掺入 Au NR 光电探测器中，通过阻断电荷注入来抑制暗电流。因此，Au NR/PEIE 混合层的协同效应导致了高性能光电探测器，其响应度为 0.360 A/W，探测率为 1.81 × 1010 Jones，与控制器件相比表现出明显的增强。有限差分时域 （FDTD） 仿真、形态学表征和光致发光研究进一步支持了增强器件性能的机制。我们相信，我们的等离激元增强协议作为钙钛矿光电器件的有前途的平台具有巨大潜力。