Design, fabrication and characterization of optoelectronic devices for applications in organic light-emitting diodes (AMOLED), solid-state lighting, photovoltaic cells (PV), thin-film transistors (TFT), and integrated circuits. Cleanroom operation and fabrication.

Characterization of electronic materials including organic semiconductors and solution processed materials.

Development of processing / patterning schemes for device fabrication and novel architectures.

Charge injection, transport, recombination and luminescence in disordered materials, particularly in organic semiconductors.

Electronic properties of semiconductors and their interfaces.

Postdoc. (Cornell MS&E)
Ph.D in Physics (Hong Kong Baptist University)
M.Phil in Physics (The Chinese University of Hong Kong)
B.Sc. in Applied Physics (Hong Kong Baptist University)

Research Associate; Department of Materials Science and Engineering, Cornell University; May 2008 – Dec 2009

Postdoctoral research associate; epartment of Materials Science and Engineering, Cornell University; May 2005 – May 2008

My research is in the area of organic electronics (now expanding to other new organic, inorganic materials and solution processed materials). This term refers to the use of organic materials to create electronic devices with unique capabilities, an area that represents one of the most dramatic technological developments of the past two decades. My interests span key aspects of organic electronics and advanced opto-eelctronic devices, including (i) understanding the fundamentals of charge injection and transport in organic semiconductors, (ii) building novel devices from organic semiconductors (electroluminescent devices, photovoltaic cells, transistors, integrated circuits) and investigating their device physics, and (iii) exploring the application of these devices in flexible electronics.

Best poster award (2nd International Sym. on Flexible Organic Electronics) July 2009

Best poster award (Materials Research Society Spring Meeting 2009, Sym. B) April 2009

Croucher Fellowship (Cornell. 13 awardees out of Ph.D applicants in the area of natural science, medicine, and technology who are permanent residents of Hong Kong and those graduated abroad) 2005 - 2007

Sir Edward Youde Memorial Fellowship (HKBU) 2002 - 2003

Chung Hwa Travel Service Fellowship (HKBU) 2001 - 2002

Madam Hui Tang Shing Yan Scholarship (HKBU) 1997 - 1998

Research mentor of undergraduates/postgraduates in HKBU (2000-04) and Cornell (2005-present)

Research mentor of visiting graduates from Graz University of Technology (Austria), University of Melbourne (Australia), The Chinese University of Hong Kong (HK), University of Vermont (USA), UC Berkeley (USA), University of Rochester (USA) (2005-present)

Teaching assistant of quantum mechanics I/II, modern physics, and optoelectronics courses (HKBU) (2000 – 2003)

Teaching assistant of basic electronics courses (CUHK)(1998 – 2000)

H-index 17; Citation 750+
1. Yingtao Xie, Shucheng Cai, Qiang Shi, Shihong Ouyang, Wen-Ya Lee, Zhenan Bao, James R. Matthews, Robert A. Bellman, Mingqiang He, Hon Hang Fong#, "High performance organic thin film transistors using chemically modified bottom contacts and dielectric surfaces", Organic Electron. (2014). In press. (DOI: 10.1016/j.orgel.2014.05.015) (IF 3.86)
2. Shihong Ouyang, YIngtao Xie, Dalong Zhu, Xin Xu, Dongping Wang, Te Tan, Hon Hang Fong#, "Photolithographic patterning of PEDOT:PSS with silver inerlayer and its application in organic light emitting diodes" Organic Electron. (2014). In press. (DOI: 10.1016/j.orgel.2014.05.004) (IF 3.86)
3. Wen-Ya Lee, Gaurav Giri, Ying Diao, Christopher J. Tassone, James R. Matthews, Michael L. Sorensen, Stefan C. B. Mannsfeld, Wen-Chang Chen, Hon H. Fong, Jeffrey B.-H. Tok, Michael F. Toney, Mingqian He and Zhenan Bao, "Effect of Non-Chlorinated Mixed Solvents on Charge Transport and Morphology of Solution-Processed Polymer Field-Effect Transistors" Adv. Funct. Mater. (2014), in press. (DOI: 10.1002/adfm.201303794) (IF 9.765)
4. Q. Shi, Y. Xie, S. Cai, W.-Y. Lee, Z. Bao, J.R. Matthews, K.L. Simonton, T.E. Myers, R.A. Bellman, M. He, H.H. Fong#, "High performance tetrathienoacene-DDP based polymer thin-film transistors using a photo-patternable epoxy gate insulating layer" Organic Electron. 15, 991 (2014). (IF 3.86)
5. J.R. Matthews, W. Niu, A. Tandi, A.L. Wallace, J. Hu, W.-Y. Lee, G. Giri, S.C.B. Mannsfeld, Y. Xie, S. Cai, H.H. Fong#, Z. Bao#, M. He#, "Scalable synthesis of fused thiophene-diketopyrrolopyrrole semiconducting polymers processed from nonchlorinated solvents into high performance thin film transistors" Chem Mater. 25, 782 (2013). (IF 8.238)
6. A.A. Zakhidov, H.H. Fong, J.A. DeFranco, J.-K. Lee, , P.G. Talyor, C.K. Ober, G.G. Malliaras, M. He, M.G. Kane, “Fabrication of polymer-based electronic circuits using photolithography”, Appl. Phys. Lett. 99, 183308 (2011). (IF 3.79)
7. A.A. Zakhidov*, J.A. DeFranco*, J.-K. Lee*, H.H. Fong*, P.G. Talyor, C.K. Ober, G.G. Malliaras, “Orthogonal processing: A new strategy for organic electronics”, Chem. Sci. 2, 1178 (2011). (IF 8.318)
8. H.H. Fong, J.-K. Lee, Y.-F. Lim, A.A. Zakhidov, W.W.H. Wong, A.B. Holmes, C.K. Ober, G.G. Malliaras, “Orthogonal processing and patterning enabled by high fluorinated light-emitting polymers”, Adv. Mater. 23, 735 (2011). (IF 14.829)
9. Chung-Han Wu, Hanying Li, H.H. Fong, V.A. Pozdin, L.A. Estroff, G.G. Malliaras, “Room-temperature preparation of crystalline TiO2 thin films and their applications in Polymer/TiO2 hybrid optoelectronic devices”, Organic Electron. 12, 1072 (2011). (IF 3.86)
10. M. He, J. Li, A. Tandia, M. Sorensen, H.H. Fong, V.A. Pozdin, D-M. Smilgies, G.G. Malliaras, “Importance of C2 symmetry for the device performance of a newly synthesized family of fused-ring thiophenes”, Chem. Mater. 22, 2770 (2010). (IF 8.238)
11. J.-K. Lee, H.H. Fong, A.A. Zakhidov, G.E. McCluskey, P.G. Taylor, M.Santiago-Berrios, H.D. Abruna, A.B. Holmes, G.G. Malliaras, C.K. Ober, “Semi-perfluoroalkyl polyfluorenes for orthogonal processing using fluorous solvents”, Macromolecules 43, 1195 (2010). (IF 5.521)
12. M. He, J. Li, M.L. Sorensen, F. Zhang, R.R. Hancock, H.H. Fong, V.A. Pozdin, D-M. Smilgies, G.G. Malliaras, “Alkylsubstituted thienothiophene semiconducting materials; Structure – Property relationships”, J. Am. Chem. Soc. 131, 11930 (2009). (IF 10.677)
13. J.-K. Lee, P.G. Taylor, A.A. Zakhidov, H.H. Fong, H.-S. Huang, M. Chatzichristidi, G.G. Malliaras, C.K. Ober, “Orthogonal processing: A novel photolithographic patterning method for organic electronics”, J. Photopolym. Sci. Tehnol. 22, 565 (2009).
14. Y.-F. Lim, J.-K. Lee, A.A. Zakhidov, J.A. DeFranco, H.H. Fong, P.G. Taylor, C.K. Ober, G.G. Malliaras, “High voltage polymer solar cell patterned with photolithography”, J. Mater. Chem. 19, 5394 (2009). (IF 6.108)
15. P.G. Taylor, J.-K. Lee, A.A. Zakhidov, M. Chatzichristidi, J.A. DeFranco, H.H. Fong, G.G. Malliaras, C.K. Ober, “Orthogonal patterning of PEDOT:PSS for organic electronics using hydrofluoroether solvents”, Adv. Mater. 21, 2314 (2009). (IF 14.829)
16. J.-K Lee, M. Chatzichristidi, A.A. Zakhidov., H.S. Hwang, E.L. Schwartz, J. Sha, P.G. Taylor, H.H. Fong, J.A. DeFranco, E. Murotani, W.W.H. Wong, G.G. Malliaras, C.K. Ober, Invited Paper “Acid-Diffusion behavior in organic thin films and its effect on patterning”, J. Mater. Chem. 19, 2986 (2009). (IF 6.108)
17. H.H. Fong, A. Papadimitratos, J. Hwang, A. Kahn, G.G. Malliaras, “Hole injection in a model fluorene-triarylamine copolymer”, Adv. Funct. Mater. 19, 304 (2009). (IF 9.765)
18. H.H. Fong, V. Pozdin, A. Amassian, G.G. Malliaras, D-M. Smilgies, M. He, S. Gasper, F. Zhang, M. Sorensen, “Tetrathienoacene copolymers as high mobility, soluble organic semiconductors”, (Communication), J. Am. Chem. Soc. 130, 13208 (2008). (IF 10.677)
19. J.-K. Lee, M. Chatzichristidi, A. Zakhidov, P.G. Taylor, J.A. DeFranco, H.S. Hwang, H.H. Fong, A.B. Holmes, G.G. Malliaras, C.K. Ober, “Acid-sensitive semi-perfluoroalkyl resorcinarene: An imaging Material for organic electronics”, (Communication), J. Am. Chem. Soc. 130, 11564 (2008) (IF 10.677)
20. A. A. Zakhidov*, J.-K. Lee*, H.H. Fong*, J. DeFranco, M. Chatzichristidi, P. Taylor, C.K. Ober, G.G. Malliaras, “Hydrofluoroethers as orthogonal solvents for chemical processing of organic electronic materials”, Adv. Mater. 20, 3481 (2008). (IF 14.829)
21. H.S. Huang, A. Zakhidov, J.-K. Lee, X. Andre, J.A. DeFranco, H.H. Fong, A.B. Holmes, G.G. Malliaras, C.K. Ober, “Dry photolithographic patterning process of organic electronic devices in supercritical carbon dioxide as solvent”, J. Mater. Chem. 18, 3087 (2008). (cover image, selected hot paper; highlighted by NSF discovery in Feb. 2nd 2009)
22. W.C.H. Choy, H.H. Fong, “Comprehensive Investigation of Absolute Optical Properties of Organic Materials”, J. Phys. D 41, 155109 (2008).
23. A. Papadimitratos, H.H. Fong, G.G. Malliaras, A. Yakimov, A. Duggal, “Degradation of hole injection at the contact between a conducting polymer and a fluorene copolymer”, Appl. Phys. Lett. 91, 042116 (2007).
24. H.H. Fong, A. Papadimitratos, G.G. Malliaras, “Non-dispersive hole transport in a polyfluorene copolymer with a mobility of 0.01 cm2V-1s-1”, Appl. Phys. Lett. 89, 172116 (2006).
25. H.H. Fong, S.K. So, “Hole transport in tris (8-hydroxyquinoline) aluminum (Alq3)”, J. Appl. Phys. 100, 094502 (2006).
26. W.C.H. Choy, K.N. Hui, H.H. Fong, Y.J. Liang, P.C. Chui, “Improving the efficiency of organic light emitting devices by using co-host electron transport layer”, Thin solid films 509, 193 (2006).
27. H.H. Fong, W.C.H. Choy, K.N. Hui, Y.J. Liang, “Highly efficient organic light-emitting diodes based on a co-host electron transporting composite”, Appl. Phys. Lett. 88, 113510 (2006).
28. H.H. Fong, S.K. So, “Effects of nitrogen, oxygen, and moisture on the electron transport in tris (8-hydroxyquinoline) aluminum (Alq3)”, J. Appl. Phys. 98, 023711 (2005).
29. K.Y. Wong, C.F. Lo, W.Y. Sham, H.H. Fong, S.K. So, L.M. Leung, “Theoretical investigation of a blue hydroxyquinaldine-based aluminum (III) complex”, Phys. Lett. A. 321, 194 (2004).
30. H.H. Fong, S.K. So, W.Y. Sham, C.F. Lo, Y.S. Wu, C.H. Chen, “Effects of tertiary butyl substitution on the charge transporting properties of rubrene-based films”, Chem. Phys. 298, 119 (2004).
31. S.C. Tse, H.H. Fong, S.K. So, “Electron transit time and reliable mobility measurements from thick film hydroxyquinoline-based organic light-emitting diode”, J. Appl. Phys. 94, 2033 (2003).
32. H.H. Fong, K.C. Lun, and S.K. So, “Extrinsic electron traps in tris(8-hydroxyquinoline) Aluminum”, Jpn. J. of Appl. Phys. 41, L1122 (2002).
33. H.H. Fong, K.C. Lun, and S.K. So, “Hole transports in molecularly doped triphenylamine derivative”, Chem. Phys. Lett. 353, 407 (2002).
34. S.K. So, H.H. Fong, C.F. Yeung, and N.H. Cheung, “Transmittance and Resistivity of Semicontinuous Copper Films Prepared by Pulsed Laser Deposition”, Appl. Phys. Lett. 77, 1099 (2000).