Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory of UV- Emitting Materials and Technology, Northeast Normal University, Jilin, Changchun, China
Conformal Organic Field-Effect Transistor Array Fabricated by Photo-Lithography
Qingxin Tang (*), Xiaoli Zhao, and Yichun Liu
Centre for Advanced Optoelectronic Functional Materials Research and Key Laboratory of UV-Emitting Materials and Technology, Northeast Normal University, Changchun, P. R. China
Next-generation electronics require that devices with lightweight, flexibility, and portability, can be worn directly on the human body, or integrated into the existing life items. Conformal devices with good flexibility and elasticity, that enable intimate and noninvasive adherence on uneven surfaces, have shown a big potential in next-generation electronics, such as electronic skin, human activities monitoring, personal healthcare, and human-machine interface. Previous work based on geometric designs, such as wavy and serpentine structures, transfers the stiff-island devices onto pre-strained stretchable substrates to impart conformability to electronics and presents the potential for a variety of wearable and implantable applications. However, the rigid nature of these active devices has limited device density, mechanical robustness, and wide applicability. So far, the whole device with sufficient conformability remains scarce because the fabrication of such a device strictly requires a new design of device geometry and a relevant adopt of materials possessing elasticity and flexibility to eliminate strain-introduced wrinkles through electrostatic adherence. Here, we have designed a novel photolithography-compatible coplanar electrode with bottom-gate bottom-contact configuration, for integration of rubrene nanobelt single-crystals into conformal organic field-effect transistors (OFETs) with the mobility as high as 23.9 cm2 V-1 s-1 and near-zero threshold voltage. Moreover, the photolithography-compatible coplanar electrode can be also used to fabricate solution-processed TIPS-pentacene single-crystal OFET array, which avoids the organic solvent corrosion efficiently. The resulting OFET array presents excellently electrical properties with device yield as high as 100%, good device uniformity, low threshold voltage, and field-effect mobility up to 0.79 cm2 V-1 s-1. All the conformal OFETs show the outstanding conformability and they can work well when conformed onto different curved objects. These results open up the capability of organic single crystals for conformal OFETs and reveal the strong potential of the new-type electrode for future large-scale wearable and implantable electronics.
教授，博士生导师， 2007年于中国科学院化学研究所获得博士学位。国家基金委优秀青年科学基金获得者（2013）。主要专注于可穿戴柔性有机电子学领域，从事光刻集成有机电路、有机场效应载流子传输机理和柔性场效应增强型传感器研究。作为主要参与人获得2016国家自然科学二等奖，另获全国优博、中科院院长特别奖、长白山学者等8项省部级荣誉，授权美国发明专利1项、中国发明专利8项，发表论文70篇，其中AM、JACS、Small、AEM共10篇，IEEE EDL 5篇，SCI他引1600余次。