Organic Sub-Bandgap Schottky Barrier Photodetectors with Near-Infrared Coherent Perfect Absorption,ACS Photonics

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Organic Sub-Bandgap Schottky Barrier Photodetectors with Near-Infrared Coherent Perfect Absorption
ACS Photonics ( IF 6.5 ) Pub Date : 2021-06-21 , DOI: 10.1021/acsphotonics.1c00478
Yeonghoon Jin ₁ , Hyung Suk Kim ₁ , Junghoon Park ₁ , Seunghyup Yoo ₁ , Kyoungsik Yu ₁

Affiliation

Organic photodetectors (OPDs) show their advantages in flexibility, lightweight, and ultrathin form factors, large area compatibility, and low-cost manufacturability, but their absorption wavelengths are typically limited to the visible range. Although internal photoemission is a promising platform to achieve sub-bandgap photodetection in the near-infrared (NIR) or mid-IR wavelengths, very few studies have been reported for organic-based Schottky barrier photodetectors (SBPDs) operable in the NIR region. In this work, we experimentally demonstrate organic-based broadband NIR SBPDs. Our proposed SBPDs were designed by employing broadband single-channel coherent perfect absorption and therefore show high optical absorption as well as incident angle- and polarization-independent characteristics without any complex patterning processes. Our simple but effective SBPDs might open up new possibilities for OPDs in the extended operation wavelength ranges toward NIR in various sensing and imaging applications.

中文翻译：

具有近红外相干完美吸收的有机亚带隙肖特基势垒光电探测器

有机光电探测器 (OPD) 在灵活性、重量轻和超薄外形、大面积兼容性和低成本制造方面显示出优势，但它们的吸收波长通常仅限于可见光范围。尽管内部光电发射是在近红外 (NIR) 或中红外波长实现亚带隙光电探测的有前途的平台，但关于可在 NIR 区域运行的有机基肖特基势垒光电探测器 (SBPD) 的研究报告很少。在这项工作中，我们通过实验证明了基于有机的宽带 NIR SBPD。我们提出的 SBPD 是通过采用宽带单通道相干完美吸收设计的，因此显示出高光吸收以及与入射角和偏振无关的特性，而无需任何复杂的图案化过程。

更新日期：2021-06-21

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