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江南大学 物联网工程学院, 江苏 无锡 214122
Received:09 March 2022,
Revised:29 March 2022,
Published:05 August 2022
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陈荣鹏,冯仕亮,郑天旭等.Ag纳米线增强硒微米管/聚噻吩自驱动光电探测器性能[J].发光学报,2022,43(08):1273-1280.
CHEN Rong-peng,FENG Shi-liang,ZHENG Tian-xu,et al.Ag Nanowires Enhance Performance of Self-powered Photodetector Based on Selenium Microtube/Polythiophene[J].Chinese Journal of Luminescence,2022,43(08):1273-1280.
陈荣鹏,冯仕亮,郑天旭等.Ag纳米线增强硒微米管/聚噻吩自驱动光电探测器性能[J].发光学报,2022,43(08):1273-1280. DOI: 10.37188/CJL.20220078.
CHEN Rong-peng,FENG Shi-liang,ZHENG Tian-xu,et al.Ag Nanowires Enhance Performance of Self-powered Photodetector Based on Selenium Microtube/Polythiophene[J].Chinese Journal of Luminescence,2022,43(08):1273-1280. DOI: 10.37188/CJL.20220078.
自驱动光电探测器能够满足现代光电器件对节能和轻质的需求,但复杂的工艺和较高的成本限制了其进一步发展。本文采用旋涂法将硒微米管(Se‐MT)和聚噻吩(PEDOT)制备成Se‐MT/PEDOT异质结,其器件在350~700 nm波长下具有良好的光响应,无偏置电压下的响应度为8 mA/W(500 nm)。为了提高器件的光响应度,利用银纳米线(Ag‐NW)修饰异质结制备Se‐MT/PEDOT/Ag-NW,增强异质结在紫外‐可见光区的光吸收并提高器件的光电性能。与Se‐MT/PEDOT器件对比,Se‐MT/PEDOT/Ag‐NW器件在350~700 nm波长下的光电流数值整体上升,特别是在0 V偏压500 nm光照下,器件的响应度提升至65 mA/W(增强800%),开关比增强400%达到552,上升和下降时间明显下降至15 ms和28 ms。这一结果表明Ag‐NW改性有机/无机异质结的方法可以应用于高性能光电探测器的制备。
Self-powered photodetectors can meet the demands of modern optoelectronic devices for energy conservation and lightweight, but the complex process and high cost limit their further development. In this work, Se-MT/PEDOT heterojunction has been prepared by spin-coating with selenium microtube(Se-MT) and polythiophene(PEDOT), which shows a good photoresponse at 350-700 nm and a responsivity of 8 mA/W at 500 nm without bias voltage. To enhance the responsivity, Se-MT/PEDOT/Ag-NW was prepared by adding silver nanowires(Ag-NW) on the surface of Se-MT/PEDOT heterojunction, enhancing the UV-Vis absorption to improve the photoelectric performance of the device. Compared to the Se-MT/PEDOT, the Se-MT/PEDOT/Ag-NW device shows enhanced photocurrent at the wavelength of 350-700 nm, especially under 500 nm illumination at zero bias, 800% improvement in responsivity of 65 mA/W, the on-off ratio up to 552 with 400% enhancement, obvious reduction in response time(rise/decay time of 15/28 ms). This result indicates that the Ag-NWs modification of organic/inorganic heterojunction can be applied to the preparation of high-performance photodetectors.
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