Zhao Xiaoli, Zhang Bing, Tang Qingxin, Ding Xueyan, Wang Shuya, Zhou Yuying, Tong Yanhong, Liu Yichun
Key Laboratory of UV Light Emitting Materials and Technology under Ministry of Education, Northeast Normal University, Changchun, 130024, P. R. China.
Sci Rep. 2017 Nov 13;7(1):15367. doi: 10.1038/s41598-017-15518-y.
Conformal transistor array based on solution-processed organic crystals, which can provide sensory and scanning features for monitoring, biofeedback, and tracking of physiological function, presents one of the most promising technologies for future large-scale low-cost wearable and implantable electronics. However, it is still a huge challenge for the integration of solution-processed organic crystals into conformal FETs owing to a generally existing swelling phenomenon of the elastic materials and the lack of the corresponding device fabrication technology. Here, we present a promising route to fabricate a conformal field-effect transistor (FET) array based on solution-processed TIPS-pentacene single-crystal micro/nanowire array. By simply drop-casting the organic solution on an anti-solvent photolithography-compatible electrode with bottom-contact coplanar configuration, the transistor array can be formed and can conform onto uneven objects. Excellent electrical properties with device yield as high as 100%, field-effect mobility up to 0.79 cmVs, low threshold voltage, and good device uniformity are demonstrated. The results open up the capability of solution-processed organic crystals for conformal electronics, suggesting their substantial promise for next-generation wearable and implantable electronics.
基于溶液处理有机晶体的共形晶体管阵列能够为生理功能的监测、生物反馈和跟踪提供传感及扫描功能，是未来大规模低成本可穿戴和植入式电子产品中最具前景的技术之一。然而，由于弹性材料普遍存在的膨胀现象以及缺乏相应的器件制造技术，将溶液处理的有机晶体集成到共形场效应晶体管中仍然是一个巨大的挑战。在此，我们展示了一种基于溶液处理的并五苯单晶微/纳米线阵列制造共形场效应晶体管（FET）阵列的可行方法。通过简单地将有机溶液滴铸在具有底部接触共面配置的与反溶剂光刻兼容的电极上，即可形成晶体管阵列，并且该阵列能够贴合在不平坦的物体上。器件展现出优异的电学性能，器件成品率高达100%，场效应迁移率高达0.79 cm²V⁻¹s⁻¹，阈值电压低，且器件均匀性良好。这些结果开启了溶液处理有机晶体用于共形电子学的可能性，表明其在下一代可穿戴和植入式电子产品中具有巨大潜力。
