Jiawei Wang

TFTs for Display

Key Laboratory of Microelectronic Devices & Integrated Technology, Institute of Microelectronics of Chinese Academy of Sciences, Beijing, 100029, China

Email: wangjiawei@ime.ac.cn

Biography

Jiawei Wang received his Bachelor in Physics from Shandong Normal University in 2012 and Doctor of Philosophy in Condensed Matter Physics from National center for nanoscience and in 2017, under the supervision of Prof. Chao Jiang. Then he began his work as a postdoc in Prof. Ling Li’s group in Institute of Microelectronics, Chinese Academy of Sciences (IME CAS), since 2017. After then in 2021, he was recruited as associate professor in IME CAS. Wang and his co-workers’ research interests focus on the physics of thin film semiconducting devices, especially on the charge transport mechanisms in disordered materials including organic molecules and amorphous metal oxides. He recently has solved the origin of nonlinear transport in conjugated polymers by proposing a dimensionality mediated collective transport model; He also explored the interface limited charge transport in IGZO transistor, the mobilities of which were enhanced approaching the intrinsic limit, around 100 cm2V-1s-1. He has published more than 40 articles in journals like Nat. Comm, and IEEE. Electron.Dev.Lett.

Abstract for Presentation

Charge transport in disordered semiconducting materials for TFTs

Charge transport processes are essential for the electrical performances of thin film transistors, to gain deeper insights into charge transport mechanisms is significant in further optimizing the design of devices and materials. This time, we will have a brief review on our recent researches of charge transport in disordered semiconducting materials widely employed in TFTs, including organic molecules and amorphous oxides like IGZO. Three issues mainly discussed in the researches, are interface, percolation and the inhomogeneity of the devices or materials. In details, the possible upper limit of mobility in IGZO TFT, the dimensionality mediated percolative transport in OTFT, the nonlinear transport and magneto-transport properties in conjugated polymers are respectively studied and discussed systematically.

References

[1] J. Wang et.al., Nat.Comm., 12, (2021) 58.

[2] M. Akai-Kasaya et.al., Phys. Rev. Lett., 115, (2015) 196801