关于新加坡国立大学Lay-Lay CHUA教授和Peter HO教授学术报告的通知

2019-11-18 432

报告题目：Electron- and hole-doped pi-conjugated polyelectrolytes for ohmic contacts

报告人： Professor CHUA Lay Lay, Department of Chemistry, National University of Singapore

邀请人：黄飞教授

报告时间：2019年11月19日（周二）下午 3:00

报告地点：北区科技园1号楼发光国重实验室502会议室

报告题目：Extreme work functions to minimize charge injection/extraction resistance to organic semiconductor devices

报告人：Professor Peter HO

邀请人：黄飞教授

报告时间：2019年11月19日（周二）下午4:00

报告地点：北区科技园1号楼发光国重实验室502会议室

报告1简介：

In this talk, I’ll review our recent understanding in the development of doped polymer charge-injection layers with systematically ‘tunable’ work functions through the self-compensated charge-doped platform[1], which affords both hole-doped and electron-doped polymers with resilience to de-doping and ‘dopant-migration, the two keys challenges for deployment. I’ll also discuss the discovery of universal electron donors that can provide in situ dark doping of the charge-injection layers[2]. As a consequence, ambient-solution-processable doped polymer interlayers that systematically span the entire work function range from 5.9 eV to 2.4 eV are now available to the community.

[1] Tang, Ang, Choo, Keerthi, Tan, Syafiqah, Kugler, Burroughes, Png, Chua, Ho, Nature 539 (2016) 536

[2] Tang, Syafiqah, Kon, Zhao, Zaini, Seah, Cass, Humphries, Grizzi, Burroughes, Png, Chua, Ho, Nature 573 (2019) 519

Lay-Lay CHUA教授简介

Lay-Lay Chua received her B.Sc. in Chemistry from National University of Singapore (NUS), 1995, and Ph.D. in Physics from the University of Cambridge in 2007 under the supervision of Professor Richard Friend. She returned to NUS to build and supervise an materials chemistry group developing new polymer organic semiconductors and additives. She was appointed Assistant Professor of the Department of Chemistry in 2008 through the Inaugural Dual-University Assistant Professorship scheme of NUS and Cambridge, promoted to Associate Professor in 2016. She serves as associate editor of Journal of Materials Chemistry C. Prior to joining academia, she has worked as engineer, reaching the rank of principal engineer in the semiconductor industry in Singapore (1996-2000); as Member of Technical Staff at Bell Labs, New Jersey, USA (2001-2002); Research Associate at University of Cambridge (2002-2004) and Research Fellow at National University of Singapore (2003-2008). Her research interests focus on materials and processing development to advance the science and technology of polymer organic semiconductors, including organic polymer−graphene hybrids for advanced applications in organic electronics, polymer thermal electric generators and batteries, and also nonlinear optics. Lay-Lay has been cited more than 5,800 times, with an h-index of 31. Lay Lay has been appointed Assistant Head of the Department of Chemistry in 2017.

About ONDL. The Organic Nano Device Laboratory (ONDL) was set up by Peter Ho, Lay-Lay Chua and Rui-Qi Png in 2005 as a joint facility of the Departments of Physics and Chemistry that host a cleanroom suite of device fabrication and characterization tools to conduct over-the-horizon, inter-disciplinary research into the science and technology of polymer organic semiconductors and devices. Work from this laboratory is well known around the world. Key breakthroughs include the discoveries of printable low-temperature nano-metal inks (Nature Materials, 2007), semiconductor-compatible photocrosslinkers (Nature Materials, 2010), broadband non-linear optical limiting films (Nature Photonics, 2011), morphology-stabilized organic solar cells (Nature Communications, 2012), graphene soft-transfer method (Nature Nanotechnology, 2013), ultrahigh and ultralow workfunction materials (Nature, 2016), Madelung-potential control of workfunction (Nature Communications, 2016), Ohmic contact transition (Nature Communications, 2018), and universal anion donors (Nature, 2019). This laboratory works closely with industry. Intellectual property from this laboratory has been licensed to industry.

报告2简介：

In this talk, following the recent availability of doped polymer charge-injection layers with systematically tunable work functions at constant carrier density, I’ll review our recent understanding of work function, which is determined not only by electronic structure, but also Coulomb effects, both e‒ion interaction (Madelung potential) and e‒e interaction (Hubbard splitting),[1] different from conventional semiconductors; and the consequences for ohmic injection, which is characterized by an ohmic transition,[2] beyond Fermi-level pinning, that is key to maximizing fill factor and minimize contact resistance for organic solar cells. I’ll also discuss some recent results beyond the ohmic transition.

[1] Png, Ang, Teo, Choo, Tang, Belaineh, Chua, Ho, Nature Commun. (2016) 7:11948 doi:10.1038/ncomms11948

[2] Tan, Png, Zhao, Ho, Nature Commun. (2018) 9:3269 doi:10.1038/s41467-018-05200-w

Peter HO教授简介

Peter Ho was born in Singapore. He received B.Sc. in Materials Science from National University of Singapore, 1996, and Ph.D. in Physics from University of Cambridge in 2001 under the supervision of Professor Richard Friend. He was appointed Junior Research Fellow of St John’s College, Cambridge, during which he also worked at Bells Labs, Murray Hill, as visiting scientist for two years. He was appointed Assistant Professor of the Department of Materials Science, NUS in 2005, and promoted to full professor at the Department of Physics in 2016. He was appointed Vice Dean of the Faculty of Science in 2014, and Deputy Dean since 2018. He sits on the management board of several university-level research institutes. His research interests span a variety of topics in polymer organic semiconductors with strong industry orientation, focusing chiefly on establishing new capabilities and understanding. Peter has published over 80 articles in international journals, and been named inventor on over 20 patent families. He is cited 10,000+ times (h-index, 45), and has co-authored 20+ papers that have been cited more than 100 times each. He was named Top Outstanding Young Person (Academic Leadership) by the Junior Chamber of Commerce, Singapore in 2009.