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Large-scale roll-to-roll printed, flexible and stable organic bulk heterojunction photodetector
npj Flexible Electronics ( IF 14.6 ) Pub Date : 2018-03-01 , DOI: 10.1038/s41528-017-0020-y
Sichao Tong , Jun Yuan , Chujun Zhang , Chunhua Wang , Baoxing Liu , Jianqiang Shen , Huayan Xia , Yingping Zou , Haipeng Xie , Jia Sun , Si Xiao , Jun He , Yongli Gao , Junliang Yang

A flexible and stable photodetector shows great potential applications in intelligent wearable devices, health monitoring, and biological sensing. The high-output fabrication of flexible and stable photodetector via the large-scale printing process would accelerate its commercialization. Herein, a high performance, flexible organic bulk heterojunction (BHJ) photodetector with good stability is designed and fabricated via a large-scale roll-to-roll (R2R) micro-gravure printing technique on polyethylene terephthalate (PET) or paper substrate, in which the organic BHJ active layer is structured with [6,6]-phenyl C61 butyric acid methyl ester (PCBM) and a donor–acceptor copolymer, i.e., employing 4,8-bis(2-ethylhexylthiophene) benzo[1,2-b;3,4-b′] dithiophene (BDTT) as the donor unit and 5,8-bis(5-thiophen-2-yl)-6,7-difluoro-2,3-bis(4-ethylhexyloxy-1-mata-luorophenyl) quinoxaline (ffQx) as the acceptor unit (PBDTT-ffQx). The PBDTT-ffQx/PCBM BHJ photodetector shows a broad photoresponse in ultraviolet and visible light, a high detectivity (D*) value up to 6.19 × 1011 Jones, and an excellent Iphoto/Idark as high as 5.6 × 102. It exhibits excellent flexibility and stability. Its performance parameters could maintain over 80% of original values after bending 10,000 cycles or exposing in ambient condition (humidity ~50%, temperature ~30 °C) for 50 days without any encapsulation. More importantly, the R2R micro-gravure printed PBDTT-ffQx/PCBM BHJ active layer is great homogeneous, and the responsivity (R) values of photodetector arrays show a very narrow distribution. The research results show that a high-performance PBDTT-ffQx/PCBM BHJ photodetector with well reliability and reproducibility can be fabricated via the R2R micro-gravure printing technique, which provides an available strategy for fabricating large-area and flexible electronic and optoelectronic devices.



中文翻译:

大型卷对卷印刷,灵活稳定的有机体异质结光电探测器

灵活而稳定的光电探测器在智能可穿戴设备,健康监测和生物传感领域显示出巨大的潜在应用。通过大规模的印刷过程,高产量地制造柔性且稳定的光电探测器将加速其商业化进程。本文中,通过大规模的卷对卷(R2R)微照相凹版印刷技术,在聚对苯二甲酸乙二醇酯(PET)或纸质基材上设计和制造了具有良好稳定性的高性能,柔性有机体异质结(BHJ)光电探测器。其有机BHJ活性层由[6,6]-苯基C 61丁酸甲酯(PCBM)和施主-受主共聚物构成,即使用4,8-双(2-乙基己基噻吩)苯并[1,2] - b; 3,4-b']二噻吩(BDTT)作为供体单元和5,8-双(5-噻吩-2-基)-6,7-二氟-2,3-双(4-乙基己氧基-1-)马塔-luorophenyl)喹喔啉(FF Qx)基作为受体单元(PBDTT- FF Qx)基。PBDTT- ff Qx / PCBM BHJ光电探测器在紫外线和可见光下显示出宽广的光响应,高达6.19×10 11 Jones的高探测灵敏度(D *)值,以及高达5.6×10 2的出色的I photo / I dark。它具有出色的柔韧性和稳定性。它的性能参数在弯曲10,000次循环后或在环境条件下(湿度〜50%,温度〜30°C)暴露50天而没有任何封装后,可以保持原始值的80%以上。更重要的是,R2R微凹版印刷的PBDTT- ff Qx / PCBM BHJ有源层非常均匀,光电探测器阵列的响应度(R)值显示出非常窄的分布。研究结果表明,可以通过R2R微凹版印刷技术来制造具有良好可靠性和可重复性的高性能PBDTT- ff Qx / PCBM BHJ光电探测器,这为制造大面积,柔性电子和光电器件提供了可用的策略。 。

更新日期:2018-03-01
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