Professor at the Institute of Chemistry, Chinese Academy of Sciences (CAS), an Academician of CAS,  and a Fellow of The World Academy of Sciences (TWAS)

Presentation Title:

Organic Field-Effect Transistors Based on Polymeric Semiconductors

Presentation Abstract:

Great interests have been aroused in flexible functional electronics and photoelectraonics,such as artificial skin, non-volatile memories, photosensors and health monitoring systems.Packed up through van der Waals interactions, organic/polymeric materials have advantages of intrinsic mechanical flexibility. During the past several years, impressive progresses have been made in organic field-effect transistors (OFETs), particularly in conjugated polymer-based FETs.
A few high-performance polymers-based FETs have been developed with a remarkable mobility of more than 10 cm 2 V −1 s −1 , which provides a promising opportunity for applications in flexible displays and wearable devices.
In this presentation, we will report the design and synthesis of a few copolymers with D−A structures exhibiting p-tpye, n-type and ambipolar behavior [16]. Fabrication of field-effect transistors based on theses copolymers, and investigations on their electronic properties are also involved.
[1] Hanlin Wang, Hongtao Liu, Qiang Zhao, Cheng Cheng, Wenping Hu, and Yunqi Liu, Adv. Mater.,2016, 28(4), 624630.
[2] Hanlin Wang, Hongtao Liu, Qiang Zhao, Zhenjie Ni, Ye Zou, Jie Yang, Lifeng Wang, Yanqiu Sun, Yunlong Guo, Wenping Hu, and Yunqi Liu, Adv. Mater., 2017, 29(32), 1701722.
[3] Zhiyuan Zhao, Zhihong Yin, Huajie Chen, Liping Zheng, Chunguang Zhu, Long Zhang,Songting Tan, Hanlin Wang, Yunlong Guo, Qingxin Tang, and Yunqi Liu, Adv. Mater., 2017,29(4), 1602410.
[4] Jie Yang, Hanlin Wang, Jinyang Chen, Jianyao Huang, Yingying Jiang, Jianqi Zhang,Longxian Shi, Yunlong Sun, Zhixiang Wei, Gui Yu, Yunlong Guo, Shuai Wang, and Yunqi Liu, Adv. Mater, 2017, 29(22), 1606162.
[5] Jie Yang, Zhiyuan Zhao, Hua Geng, Changli Cheng, Jinyang Chen, Yunlong Sun, Longxian Shi,Yuanping Yi, Zhigang Shuai, Yunlong Guo, Shuai Wang, and Yunqi Liu, Adv. Mater., 2017, 29(36),1702115.
[6] Chunguang Zhu, Zhiyuan Zhao, Huajie Chen, Liping Zheng, Xiaolin Li, Jinyang Chen, Yanming Sun, Feng Liu, Yunlong Guo, and Yunqi Liu, J. Am. Chem. Soc., 2017, 139 (49), 17735–17738.

Biography:

Yunqi Liu was graduated from Nanjing University in 1975, received a doctorate from Tokyo Institute of Technology, Japan in 1991. Presently, he is a Professor at the Institute of Chemistry, Chinese Academy of Sciences (CAS), an Academician of CAS,  and a Fellow of The World Academy of Sciences (TWAS). His current research interests include design and synthesis of molecular materials, including p-conjugated small molecules, polymers, and graphene, fabrication of related devices, including field-effect transistors and molecular electronics, and investigation of their electronic properties. He has published more than 600 papers in SCI journals (in which, over 130 of papers with IF>10), cited by other researchers for more than 25,000 times with an h-index of 80. He was recognized as “Highly Cited Researchers” by Thomson Reuters in Materials Science from 2014 to 2017. In addition, he has obtained 70 of granted patents, published three books and 18 book chapters. He received the National Natural Science Award (2nd grade) in 2007 and 2016, and Beijing Science and Technology Award in 2017 (1st grade).