个人简介

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, Univ. Cambridge, 2002-2003; Research Fellow, ONDL, Physics, NUS, 2004-2008; Ph.D. Physics, Univ. of Cambridge

研究领域

Polymer and Materials Science/Nanomaterials

Several device chemistry aspects that is central to Organic Electronics, including: (i) structure–morphology–property relations (ii) materials development and (iii) energy-level engineering. (iv) functionalisation and development of new applications for solution-processable graphenes and CVD graphene. Recent Highlights G.K. Lim, Z.L. Chen, J. Clark, R.G.S. Goh, W.H. Ng, H.W. Tan, R.H. Friend, P.K.H. Ho, L.L. Chua, “Giant broadband nonlinear optical absorption reponse in dispersed graphene single sheets”, Nature Photonics, 5(2011) 554. Highlighted by Nature Publishing Group (Asia Materials). Dispersed single graphene sheets show optical limiting behaviour with limiting threshold lower than the benchmark carbon black suspension and carbon nanotubes through a new nonlinear optical limiting mechanism due to the interaction of the sheets with the environment, and not micro-plasma damage. This leads to the first ever practical non-linear optical-limiting solid-state films that can be incorporated into protective devices.

近期论文

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A High-performance p-doped conducting polymer blend based on sulfonated polyalkoxythiophene and poly(4-hydroxystyrene). D. Belaineh 1, R.Q. Png 1, C.L. McGuiness 2, M. Mathai 2, V. Seshadri 2, P.K.H. Ho 1. Chem. Mater. dx.doi.org/10.1021/cm5012229 A transition solvent strategy to print polymer:fullerene films using halogen-free solvents for solar cell applications. G.H. Lim1,3, J.M. Zhuo1,2, L.Y. Wong1, S.J. Chua3, L.L. Chua1,2, P.K.H. Ho 1,4. Org. Electron. 15 (2014) 449 Evalution of built-in potential and loss mechanisms at contacts in organic solar cells: device model parameterisation, validation, and prediction. B. Liu 1, R.Q. Png 1,2, J.K. Tan 1,2, P.K.H. Ho 1,2. Adv. Energy. Mater. 4 (2014) 1200972 Efficient surfactant-free and chemical reductant-free solvothermal deoxidation of solution-processable sub-stoichiometric graphene oxide. Z.L. Chen1, F.Y. Kam2, V. Keerthi2, J. Song2, C. Hu2, L.Y. Wong1, G.K. Lim1,3, L.L. Chua1,2. J. Mater. Chem. C 1 (2013) 7246 Suppressing recombination in polymer photovoltaic devices via energy-level cascades. Z.K. Tan1, K. Johnson1, Y. Vaynzof1, A.A. Bakulin2, L.L. Chua3, P.K.H. Ho4, R.H. Friend1 Adv. Mater. 25 (2013) 4131 Influence of graphite source on chemical oxidative reactivity. Z.L. Chen2, F.Y. Kam1, R.G.S. Goh2, J. Song1, G.K. Lim2,3, L.L. Chua1,2 Chemistry of Materials 25 (2013) 2944 A general method for transferring graphene onto soft surfaces. J. Song1, F.Y. Kam1, R.Q. Png2, W.L. Seah2, J.M. Zhuo2, G.K. Lim 2,3, P.K.H. Ho2, L.L. Chua1,2 Nature Nanotechnology 8 (2013) 356 Donor-acceptor interface modification by zwitterionic conjugated polyelectrolytes in polymer photovoltaics. A. Kumar1, G. Pace1, A.A. Bakulin1, J.F. Fang2, P.K.H. Ho3, W.T.S. Huck 2, R.H. Friend1, N.C. Greenham1 Energy & Environmental Science 6 (2013) 1589 Jettable fluid space and jetting characteristics of a microprint head. L.Y. Wong1, G.H. Lim1,2, T. Ye1, F.B.S. Silva1, J.M. Zhuo1, R.Q. Png1, S.J. Chua2, P.K.H. Ho1 Journal of Fluid Mechanics 713 (2012) 109 High internal quantum efficiency in fullerene solar cells based on crosslinked polymer donor networks. B. Liu1, R.Q. Png1, L.H. Zhao2, L.L. Chua1,2, R.H. Friend1,3, P.K.H. Ho1,4 Nature Communications 3 (2012) 1321 Furan substituted diketopyrrolopyrrole and thienylenevinylene based low band gap copolymer for high mobility organic thin film transistors. P. Sonar1, J.M. Zhuo2, L.H. Zhao3, K.M. Lim2, J.H. Chen4, A.J. Rondinone4, S.P. Singh1,5, L.L. Chua2,3, P.K.H. Ho2, A. Dodabalapur1,6 Journal of Materials Chemistry 22 (2012) 17284 Polarization effects on energy-level alignment at the interfaces of polymer organic semiconductor films. L.H. Zhao1,2, R.Q. Png1, C.C.H. Chiam1, H. Guo1, J.M. Zhuo1, L.L. Chua1,2, A.T.S. Wee1, P.K.H. Ho1 Applied Physics Letters 101 (2012) 053304 Effective work functions for the evaporated metal/organic semiconductor contacts from in-situ diode flatband potential measurements. M. Zhou1, R.Q. Png1, S.H. Khong2, S. Sivaramakrishnan1, L.H. Zhao3, L.L. Chua1,2,3, R.H. Friend1,2, P.K.H. Ho1 Applied Physics Letters 101 (2012) 013501 Role of borderline solvents to induce pronounced extended-chain lamellar order in π-stackable polymers. L.H. Zhao1, R.Q. Png1, J.M. Zhuo2, L.Y. Wong1, J.C. Tang2, Y.S. Su1, L.L. Chua1,2 Macromolecules 44 (2011) 9692 Giant broadband nonlinear optical absorption response in dispersed graphene single sheets. G.K. Lim1,2, Z.L. Chen2, J. Clark4, R.G.S. Goh3, W.H. Ng1, H.W. Tan1, R.H. Friend2,4, P.H.K. Ho2, L.L. Chua2,3,4 Nature Photonics 5 (2011) 554 Surface-directed spinodal decomposition in poly[3-hexylthiophene] and C61-Butyric acid methyl ester blends. Y. Vaynzof1, D. Kabra1, L.H. Zhao2, L.L. Chua2, U. Steiner1, R.H. Friend1,2ACS Nano 5 (2011) 329 Improved electron injection in poly(9,9'-dioctylfluorene)- co-benzothiodiazole via cesium carbonate by means of coannealing. Y. Vaynzof1, D. Kabra1,L.L. Chua2, R.H. Friend1,2Applied Physics Letters 98 (2011) 113306 The dependence of device dark current on the active-layer morphology of solution-processed organic photodetectors. P. E. Keivanidis1,2, P.K.H. Ho3, R. H. Friend2,3, N. C. Greenham2 Advanced Functional Materials 20 (2010) 3895 Determination of the interface δ-hole density in a blue-emitting organic semiconductor diode by electromodulated absorption spectroscopy. M. Zhou1, R.Q. Png1, S. Sivaramakrishnan1, P.J. Chia1, C.K. Yong1, L.L. Chua1,2, P. K. H. Ho1 Applied Physics Letters 97 (2010)113505 Printable metal nanoparticle inks. B. T. Anto1, L.Y. Wong1, R.Q. Png1, S. Sivaramakrishnan1, L.L. Chua1,2, P. K. H. Ho1 Handbook of Nanophysics, Functional Nanomaterials. Chapter 2. ISBN: 978-1-4200-7552-6 Summary of book