Speaker:Professor CHUA Lay Lay, Department of Chemistry, National University of Singapore
Time: 17:00, Nov. 19th, 2019
Venue: Room 502, Building of State Key Laboratory of Luminescent Materials and Devices, Wushan Campus
Abstract: IIn 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
Biography: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.