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High-Resolution, Flexible, and Full-Color Perovskite Image Photodetector via Electrohydrodynamic Printing of Ionic-Liquid-Based Ink

机译：高分辨率，柔性和全彩钙钛矿图像光电探测器通过电液动力学印刷离子 - 液体油墨

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摘要

Direct full-color image photodetectors without dichroic prisms or sophisticated color filters have considerable advantages in target recognition and information acquisition for electronic eyes and wearable sensors. However, the ability to combine various multispectral semiconductors in a high-resolution and cost-effective manner is still challenging. Here, high-resolution electrohydrodynamic (EHD) printing, together with ionic liquid methylammonium acetate (MAAc) as the solvent, is first introduced to directly integrate various spectral-response perovskite films into a pixelized full-color photodetector. EHD printing enables micro/nanopatterning by using high electrical force to induce jetting, and MAAc improves film quality with scant pinholes and large-size grains by decreasing the perovskite growth rate. By optimizing the printing process and crystallization condition, 1 mu m perovskite dot arrays are EHD printed; this is, to the best of knowledge, the smallest printed feature size of perovskite application. And the photodetector still achieves high R and D* values of 14.97 A W-1 and 1.41 x 10(12) Jones, respectively. Finally, an integrated flexible full-color image photodetector is constructed, which successfully realizes light signal detection and color recognition, paving a versatile and competitive approach for future full-color image sensors and artificial vision systems.
机译：没有二向色棱镜或复杂的滤色器的直接全彩色图像光电探测器在目标识别和电子眼睛和可穿戴传感器的信息采集方面具有相当大的优势。然而，以高分辨率和成本有效的方式结合各种多光谱半导体的能力仍然具有挑战性。这里，首先引入高分辨率电液动力学（EHD）印刷与离子液体甲基铵（MAAC）作为溶剂一起引入，以将各种光谱响应钙钛矿膜直接集成到像素化的全彩光探测器中。 EHD Printing通过使用高电力来诱导喷射，Maac通过降低钙钛矿生长速率，通过使用高电力来实现微/纳米透射机。通过优化印刷过程和结晶条件，1μm蜂钙钛矿点阵列是印刷的;这是，据知识中，佩洛斯库特应用程序的最小印刷特征大小。光电探测器分别仍然达到高R和D *值，分别为14.97A W-1和1.41 x 10（12）琼斯。最后，构造了集成的柔性全彩色图像光电探测器，其成功实现了光信号检测和颜色识别，为未来的全彩图像传感器和人工视觉系统铺平了多功能和竞争的方法。

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  • 来源
    《Advanced Functional Materials》 |2021年第28期|2100857.1-2100857.9|共9页
  • 作者

    Wang Qilu; Zhang Guannan; Zhang Hanyuan; Duan Yongqing; Yin Zhouping; Huang YongAn;

  • 作者单位

    Huazhong Univ Sci & Technol State Key Lab Digital Manufacture Equipment & Tec Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol State Key Lab Digital Manufacture Equipment & Tec Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol State Key Lab Digital Manufacture Equipment & Tec Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol State Key Lab Digital Manufacture Equipment & Tec Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol State Key Lab Digital Manufacture Equipment & Tec Wuhan 430074 Peoples R China;

    Huazhong Univ Sci & Technol State Key Lab Digital Manufacture Equipment & Tec Wuhan 430074 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    electrohydrodynamic printing; full color image sensors; high resolution patterning; image photodetector; perovskite;

    机译：电液动力学印刷;全彩色图像传感器;高分辨率图案化;图像光电探测器;Perovskite;

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