Facile Nanogold–Perovskite Enabling Ultrasensitive Flexible Broadband Photodetector with pW Scale Detection Limit,Advanced Optical Materials

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Facile Nanogold–Perovskite Enabling Ultrasensitive Flexible Broadband Photodetector with pW Scale Detection Limit
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2018-10-08 , DOI: 10.1002/adom.201800996
Xiao Luo _{1,

2} , Feiyu Zhao ₁ , Yuanlong Liang ₁ , Lili Du ₁ , Wenli Lv ₃ , Kun Xu ₁ , Ying Wang ₄ , Yingquan Peng _{1,

3}

Affiliation

Broadband photodetection is central to spectroscopy, imaging, and sensing in modern science and technology. However, traditional devices suffer from a higher dark current because as‐adopted photoactive semiconductors tend to be accompanied by a large noise output due to higher conductivity, resulting in low sensitivity and detectivity. The utilization of photon manipulation as enhancing light–matter interaction on a deep subwavelength scale provides a fascinating opportunity to achieve higher photocurrent while keeping a low noise level. Here, an ultrasensitive flexible broadband photodetector based on multiphysics coupled nanogold–perovskite films is demonstrated. The mechanism involves optimized interfacial injection, bulk transport, photon trapping, and energy transformation, and leads to high photosensitivity (≈10⁵), low detection limit (5.7 pW), and wide spectral response (UV–vis–NIR). These results show that the nanometal–perovskite framework can be used as a powerful platform for ultrasensitive flexible broadband photodetection, competitive with state‐of‐the‐art commercial devices or publications.

中文翻译：

方便的纳米金–钙钛矿，具有pW规模检测极限的超灵敏柔性宽带光电探测器

宽带光电检测对于现代科学技术中的光谱学，成像和传感至关重要。但是，传统设备会遭受较高的暗电流，因为采用的光敏半导体由于较高的电导率而往往伴随着较大的噪声输出，从而导致灵敏度和检测率较低。利用光子操纵技术在深亚波长范围内增强光与物质的相互作用，为获得较高的光电流同时保持较低的噪声水平提供了令人着迷的机会。在这里，展示了一种基于多物理场纳米金-钙钛矿薄膜的超灵敏柔性宽带光电探测器。该机制包括优化界面喷射，散装运输，光子捕获，和能量转换，并导致高的光敏性（≈10 ⁵），低检测限（5.7 pW）和宽光谱响应（UV-vis-NIR）。这些结果表明，纳米金属钙钛矿框架可以用作超灵敏柔性宽带光电检测的强大平台，与最新的商业设备或出版物竞争。

更新日期：2018-10-08

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