Untitled Document
 

Peter HO Kian Hoon

Assistant Professor

Office : S7-03-10
Tel : (65) 6516 8781
Fax : (65) 6777 6126
Email : phyhop@nus.edu.sg
     
 
Current Research and Future Direction

Organic semiconductor device physics and technology, covering polymer light-emitting diodes, field-effect transistors, photovoltaic memory devices, and monolayer devices. Polymer heterostructures and interfaces.

The following programmes have been initiated:

  • Interface science : We have initiated a programme to study the frontier polymer chains at both the air and substrate interfaces of polymer semiconductors using near-edge X-ray absorption spectroscopy at the Singapore Synchrotron Light Source and their relevance to device performance, in collaboration with the surface science group of Professor Andrew Wee of the Department of Physics.

  • Device physics : We have initiated a programme to study charge-modulated absorption in devices and its application to measure built-in potential and energy level alignment in state-of-the-art devices, in collaboration with groups at the Institute of Materials Research and Engineering (IMRE).

  • Novel device architectures: We have initiated various programmes to fabricate novel architectures of polymer FETs and memory devices. Recent successes in Singapore include the discovery of general n-type field-effect behaviour in organic semiconductors, the discovery of logic gates from four-terminal dual-gate devices, the observation of robust insulator-to-metal transformation in polymer-nanocrystal composites and the achievement of robust ultrathin gate dielectrics. A number of these investigations are conducted in collaboration with the group of Professor Richard Friend of University of Cambridge.

     
   
Publications

  • Organic double-gate field-effect transistors: Logic-AND operation. L.L. Chua, R.H. Friend, P.K.H. Ho, Appl. Phys. Lett. 87 (2005) 253512.

  • General observation of n-type field-effect behavior in organic semiconductors. L.L. Chua, P.K.H. Ho, Zaumseil, Chang JF, Ou ECW, Sirringhaus H, Friend RH, Nature, 434, 194 (2005).

  • High-stability ultrathin spin-on benzocyclobutene gate dielectric for polymer field-effect transistors. L.L. Chua , P.K.H. Ho, Sirringhaus H and Friend RH, Appl. Phys. Lett. 84 (2004) 3400

  • Photoluminescence of poly(p-phenylenevinylene)-silica nanocomposites: Evidence for dual emission by Frank-Condon analysis. P.K.H. Ho, J.S. Kim, N. Tessler, R.H. Friend, J. Chem. Phys. 115 (2001) 2709.

  • Molecular-scale interface engineering for polymer light-emitting diodes. P.K.H. Ho, J.S. Kim, J.H. Burroughes, H. Becker, S.F.Y. Li, T.M. Brown, F. Cacialli, R.H. Friend, Nature 404 (2000) 481.

 

top