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首页> 外文期刊>ACS applied materials & interfaces >Sensitive Photodetection with Photomultiplication Effect in an Interfacial Eu2+/3+ Complex on a Mesoporous TiO2 Film
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Sensitive Photodetection with Photomultiplication Effect in an Interfacial Eu2+/3+ Complex on a Mesoporous TiO2 Film

机译：在介孔TiO2膜上的界面Eu2 + / 3 +复合物中具有光滤波效应的敏感光检测

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摘要

A simple device structure composed of an interfacial Eu2+/3+ complex on a mesoporous TiO2 film is developed by a solution process and acts as the high-performance photodetector with photomultiplication phenomena. The electron transfer from the photoexcited organic ligand, 2,2':6',2 ''-terpyridine (terpy), as a photosensitizer to TiO2 is accelerated by the reduction level of Eu3+/2+ ions chemically bonding among terpy and TiO2, resulting in the generation of a large photocurrent. It is worth noting that its external quantum efficiency is in excess of 10(5)% under applied reverse bias. The corresponding responsivity of the device is also determined to be 464 A/W at an irradiation light intensity of 0.7 mW/cm(2) (365 nm), which is more than 3 orders of magnitude larger than those of inorganic photodetectors. A dark current of the device can be reduced to 10(-9) A/cm(2) by introducing a Eu oxide thin-film layer as a carrier blocking layer at the interface between transparent conducting oxide (TCO) and the TiO2 layer, and the specific detectivity reaches 5.2 x 10(15) jones at 365 nm with -3 V. The performance of our organic-inorganic hybrid photodetector surpasses those of existing ultraviolet photodetectors.
机译：由介孔TiO2膜上的界面EU2 + / 3 +复合物组成的简单装置结构由溶液过程开发，并作为具有光倍增现象的高性能光电探测器。来自光透镜有机配体，2,2'：6'，2'' - 吡啶（Terpy）的电子转移，作为TiO 2的光敏剂加速，通过在Terpy和TiO2之间化学键合的Eu3 + / 2 +离子的还原水平加速，导致产生大的光电流。值得注意的是，在施加反向偏压下，其外部量子效率超过10（5）％。该器件的相应响应性也在0.7mW / cm（2）（365nm）的照射光强度下是464a / w，其大于大于无机光电探测器的3个峰值。通过在透明导电氧化物（TCO）和TiO2层之间的界面处，可以将设备的暗电流减小到10（-9）A / cm（2）通过作为载体阻塞层。特定探测达到5.2×10（15）个琼斯，365nm，具有-3 V.我们的有机无机混合光电探测器的性能超过现有的紫外线光电探测器。

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  • 作者

    Ishii Ayumi; Sakai Tatsuro; Takahashi Riku; Ogata Shuhei; Kondo Kazuki; Kondo Takahiro; Iwasawa Daichi; Mizushima Soichi; Yoshihara Koushi; Hasegawa Miki;

  • 作者单位

    Aoyama Gakuin Univ Coll Sci &

    Engn Chuo Ku 5-10-1 Fuchinobe Sagamihara Kanagawa 2525258 Japan;

    Aoyama Gakuin Univ Coll Sci &

    Engn Chuo Ku 5-10-1 Fuchinobe Sagamihara Kanagawa 2525258 Japan;

    Aoyama Gakuin Univ Coll Sci &

    Engn Chuo Ku 5-10-1 Fuchinobe Sagamihara Kanagawa 2525258 Japan;

    Aoyama Gakuin Univ Coll Sci &

    Engn Chuo Ku 5-10-1 Fuchinobe Sagamihara Kanagawa 2525258 Japan;

    Aoyama Gakuin Univ Coll Sci &

    Engn Chuo Ku 5-10-1 Fuchinobe Sagamihara Kanagawa 2525258 Japan;

    Aoyama Gakuin Univ Coll Sci &

    Engn Chuo Ku 5-10-1 Fuchinobe Sagamihara Kanagawa 2525258 Japan;

    Aoyama Gakuin Univ Coll Sci &

    Engn Chuo Ku 5-10-1 Fuchinobe Sagamihara Kanagawa 2525258 Japan;

    Aoyama Gakuin Univ Coll Sci &

    Engn Chuo Ku 5-10-1 Fuchinobe Sagamihara Kanagawa 2525258 Japan;

    Aoyama Gakuin Univ Coll Sci &

    Engn Chuo Ku 5-10-1 Fuchinobe Sagamihara Kanagawa 2525258 Japan;

    Aoyama Gakuin Univ Coll Sci &

    Engn Chuo Ku 5-10-1 Fuchinobe Sagamihara Kanagawa 2525258 Japan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    photodetection; photomultiplication; interfacial complex; europium; TiO2;

    机译：光探测;光锁相;界面复合物;铕;TiO2;

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