个人简介

B.Sc. (CUHK), M.S., Ph.D. 1995(Chicago) Achievements HKU Outstanding Young Researcher Award (2003-2004)

研究领域

Materials Science

Design and synthesis of organic molecular and polymeric materials with interesting electronic and photonic properties. Metal-containing polymers for photovoltaic applications. Fabrication of organic opto-electronic devices by novel thin-film deposition methods. Synthesis of organic-inorganic nanocomposites. Polymer Chemistry and Materials For Opto-electronics 1. Synthesis of metal-containing polymers for opto-electronic applications We have developed a series of metal-containing polymers that exhibit interesting electronic and photonic properties. For examples, α-diimine complexes of different transition metals have been incorporated into different polymer systems such as poly(ρ-phenylene)s, poly(ρ-phenylenevinylene)s, polyamides, poly(benzobisoxazole)s, poly(benzobisthiazoles), and polyimides etc. It was found that the metal complexes played very important roles in photosensitization and light emission processes. They can be fabricated into organic photovoltaic cells with power conversion efficiency of approximately 0.5%. 2. Synthesis of photosensitizing molecules We are interested in the development of novel multifunctional metal complexes that can be used as photosensitizing materials in organic solar cells. The efficiencies of organic solar cells are limited by several factors such as low absorption coefficient, narrow absorption in the visible-NIR regions, and poor charge carrier mobility. We have also developed a series of carbon nanotube-block copolymer composite materials. The block copolymer can functionalize the carbon nanotube surface by non-covalent interaction, and the photosensitizing units in the copolymer can enhance the photoconductivity of the resulting materials. 3. Synthesis of functional polymers by controlled radical polymerization We have employed the atom transfer radical polymerization (ATRP) or reversible addition- fragmentation chain transfer (RAFT) polymerization in the synthesis of multiblock functional polymers. Different polymer blocks with various functional units such as charge transport units, metal complex sensitizers, surface anchoring groups, and polyelectrolytes can be introduced into a single polymer molecule. The resulting functional block copolymers can self-assemble to different structures because of their amphiphilic nature. They have potential applications in the formation of micelles, templates for nanofabrication, and modification of the surface of semiconducting metal oxides.

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H. L. Wong, C. S. K. Mak, W. K. Chan, A. B. Djurisic Appl. Phys. Lett. 2007, 90, 081107. C. W. Tse, K. Y. K. Man, K. W. Cheng, C. S. K. Mak, W. K. Chan, Z. T. Liu, C. T. Yip, A. B. Djurisic. Chem. Eur. J. 2007, 13, 328. W. K. Chan Coord. Chem. Rev. 2007, 251, 2104. W. Y. Wong, X. Z. Wang, Z. He, A. B. Djurisic, C. T. Yip, K. Y. Cheung, H. Wang, C. S. K. Mak, W. K. Chan. Nature Mater. 2007, 6, 521. C. S. K. Mak, D. Pentlehner, M. Stich, O. S. Wolfbeis, W. K. Chan and H. Yersin. Chem. Mater. 2009, 21, 2173. C. S. K. Mak, W. K. Cheung, Q. Y. Leung,W. K. Chan. Macromol. Rapid Commun. 2010, 31, 875. C. H. Li, A. M. C. Ng, C. S. K. Mak, A. B. Djurisic, W. K. Chan . ACS Appl. Mater. Inter. 2012, 4, 74-80.