B.Sc. Computational Chemistry, NUS, 1995; Engineer, then Principal Engineer, Chartered Semiconductor Manufacturing, 1995-2001; Member of Technical Staff, Bell Laboratories, 2001-2002; Research Associate, Cavendish Laboratory, University of Cambridge, 2002-2003; Research Fellow, ONDL, Physics, NUS, 2004-2008; Ph.D. Physics, University of Cambridge.
My research program focuses on materials and processing development to advance the science and technology of polymer organic semiconductors including organic polymer−graphene or polymer-swcnt hybrids. Several device chemistry aspects that is central to Organic Electronics (light-emitting diodes, solar cells, thermoelectric generators, photodiodes, batteries and sensors, including structure-morphology–property relations and energy-level engineering.
Electrodes with sufficiently low, work functions to match the appropriate band edge of the semiconductor are required in all high performance devices for efficient injection (and/or extraction) of electrons. Ambient processability will confer an added design and manufacturing advantage; but electron contacts with work functions shallower than 4.0 eV are fundamentally incompatible with oxygen and moisture reduction reactions. We recently show that this dilemma can be resolved in an elegant way using di- and higher-valent anions with negative gas-phase electron affinities, such as oxalate, sulfite, carbonate, sulfate and phosphate.