360度全方位可列印透明光電探測器

論文標題：360° omnidirectional, printable and transparent photodetectors for flexible optoelectronics

期刊：npj Flexible Electronics

作者：Der-Hsien Lien, Hsin-Ping Wang, Shih-Bin Chen, Yu-Chieh Chi, Chung-Lun Wu, Gong-Ru Lin, Ying-Chih Liao, Jr-Hau He

數字識別碼： 10.1038/s41528-018-0032-2

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光電子學在信息傳遞、能量採集、環境監測以及生物醫學等應用領域佔據著重要的地位。為了將這些應用更好的融入人們的日常生活，改善下一代電子設備的可穿戴特性及移動系統，如發展柔性顯示、可穿戴光子紡織品、自供電系統以及生物信號監測，便顯得尤其必要。為了實現柔性光電子器件的可彎曲、包裹及拉伸特性，整個電子學系統，包括活動層、電極、電路等，都必須具備柔性及可延展性，以適用於人們的肢體運動，從而實現光電子學在可穿戴器件及移動設備領域的應用。

Jr-Hau He教授和合作者們在npj Flexible Electronics 發表了題為「360° omnidirectional, printable andtransparent photodetectors for flexible optoelectronics」的文章，展示了一種360度全方位透明光電探測器，可拉伸包裹在柔性基底周圍。此設備經由噴墨印刷，將氧化鋅及銀納米絲交錯植入熱塑性聚氨酯彈性體後，在透明區域具有超過75%的透明比，展現出了高光響應度與響應時間（分別是10-30A/W和0.8S）。此外，此柔性光電探測器能夠較好的承受變形，可應用於捲曲的表面，如皮膚，光纖等。此研究將助力於柔性光電子學的發展，包括纖維光學、可穿戴電子、自供電系統、生物信號檢測器以及表皮電子等方面的應用。

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摘要：Flexible optoelectronics that can be bent, wrapped, and stretched have attracted interest for wearable and mobile applications. In this work, we demonstrate a transparent 360° omnidirectional photodetector (PD) that can be stretched and wrapped around flexible or curved substrates. By embedding interlaced ZnO and Ag nanowires (NWs) in thermoplastic polyurethane via inkjet printing, the device featured > 75% transmittance in the visible region, showing high photoresponsivity and response time (10–30 A/W and 0.8 s, respectively). Moreover, the flexible PD performs well under deformation (only 9% decay in the photocurrent under 60% strain and 8% loss when the device is bent at a radius of 5 mm), which allows it to be readily applied on curved surfaces, such as skin or optical fibers. This study opens the door for the development of flexible optoelectronics that could be implemented in fiber optics, wearable electronics, self-powered systems, bio-signal monitors, and epidermal electronics.

期刊介紹： npj Flexible Electronics is an online-only and open access journal, which publishes high-quality papers related to flexible electronic systems, including plastic electronics and emerging materials, new device design and fabrication technologies, and applications.

（來源：npj Flexible Electronics）

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