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タイトル
和文: 
英文:Series Photothermoelectric Coupling Between Two Composite Materials for a Freely Attachable Broadband Imaging Sheet 
著者
和文: 李 恒, 鈴木 大地, 河野 行雄.  
英文: Kou Li, Daichi Suzuki, Yukio Kawano.  
言語 English 
掲載誌/書名
和文: 
英文:Advanced Photonics Research 
巻, 号, ページ Volume 2    Issue 3    2000095
出版年月 2021年3月3日 
出版者
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英文: 
会議名称
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開催地
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公式リンク https://onlinelibrary.wiley.com/doi/10.1002/adpr.202000095
 
DOI https://doi.org/10.1002/adpr.202000095
アブストラクト As flexible wearable sensors and imagers are receiving attention from diverse social sectors, the freely attachable photothermoelectric (PTE) conversion technique should be evaluated to develop a highly usable safety sensor network. Although carbon nanotube (CNT)‐related materials should be effective, the key parameters/structures that maximize PTE conversion have not been clarified, thus hindering optimum device design and practical use. Herein, the flexible, sensitive broadband photodetection operation based on a coupling configuration between the CNT film photo/heat/electron channel and metal electrode is evaluated. Experimental PTE measurements and steady‐state thermal distribution simulations reveal that a series coupling of a p‐type CNT film channel and a highly negative Seebeck coefficient counter metal electrode facilitate superior photodetection performances than those of a parallel coupling configuration. Furthermore, subsequent device designs provide sensitive broadband photodetection from the millimeter‐wave to visible light wavelength regions with a minimum noise equivalent power of 5 pWHz−1/2 in an uncooled nonvacuum condition. Simultaneously, the mechanical flexibility of the proposed photodetector allows for its use in freely attachable sheet imager applications on curvilinear objects, and the nondestructive 3D photomonitoring of a defective intricately bent sample is demonstrated.

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