Organic Optoelectronic Materials Laboratory
Department of Chemical Engineering
and Laboratory for Laser Energetics



Principal Investigator

Shaw H. Chen (Ph.D. Chemical Engineering, University of Minnesota, 1981)
Professor of Chemical Engineering
Chemical Engineering Chair (2000-2009)
Senior Scientist, Laboratory for Laser Energetics
University of Rochester, Rochester, New York


Contact Information

Room 4313 Wegmans Hall
University of Rochester
Rochester, New York 14627
Telephone: (585)275-4040/Facsimile: (585)273-1348
E-mail: shch@lle.rochester.edu


Research Expertise

Glassy Liquid Crystals, Robust Photoalignment Polymers, Organic Semiconductors, Self-Organization of Nanoparticles, Optoelectronic Devices.


Research Summary

Organic materials constitute the core of our research encompassing molecular design, computational chemistry, material synthesis and processing, and optoelectronic device applications. In particular, we have developed liquid crystals, including conjugated systems, capable of preserving molecular order in glassy state while ensuring long-term stability against crystallization. Various device concepts have been demonstrated using selected materials, e.g. nonabsorbing polarizers, notch filters and reflectors, polarized electroluminescence, field-effect transistors, solid-state lasers, and robust photoalignment films for orienting both fluid and glassy liquid crystals. Current activities include: (1) Geometric surfactancy as a new concept beyond traditional amphiphilicity; (2) Thermodynamic and kinetic analysis of particle ordering to motivate effective nanomaterials processing; (3) Transition temperatures of glassy liquid crystals through computation; and (4) Robust optical and photonic devices comprising either fluid or glassy liquid crystals on photoalignment layers for high peak-power laser applications.


RECENT PUBLICATIONS

  1. S. K.-H. Wei, L. Zeng, K. L. Marshall, and S. H. Chen, "Room-Temperature Processing of π-Conjugated Oligomers into Uniaxially Oriented Monodomain Films on Coumarin-Based Photoalignment Layers," J. Polymer Sci. Part B: Polymer Phys. 49, 725-731 (2011). View
  2. T. Y.-H. Lee, Q. Wang, J. U. Wallace, and S. H. Chen,"Temporal Stability of Blue Phosphorescent Organic Light-Emitting Diodes Affected by Thermal Annealing of Emitting Layers," J. Mater. Chem. 22, 23175-23180 (2012). View
  3. Q. Wang, J. U. Wallace, T. Y.-H. Lee, J. J. Ou, Yu.-T. Tsai, Y.-H. Huang, C.-C. Wu, L. J. Rothberg, and S. H. Chen, "Evaluation of Propylene-, Meta-, and Para-Linked Triazine and t-Butyltriphenylamine as Bipolar Hosts for Phosphorescent Organic Light-Emitting Diodes," J. Mater. Chem. C 1, 2224-2232 (2013). View
  4. Q. Wang, J. U. Wallace, T. Y.-H. Lee , L. Zeng, J. J. Ou, and S. H. Chen, "Charge Carrier Mobility through Vacuum-Sublimed Glassy Films of s-Triazine- and Carbazole-Based Bipolar Hybrid and Unipolar Compounds," Org. Electron. 14, 2925-2931 (2013). View
  5. H. M. P. Chen, J. J. Ou, and S. H. Chen, "Glassy Liquid Crystals as Self-Organized Solid Films for Robust Optoelectronic Devices." Nanoscience with Liquid Crystals: from Self-Organized Nanostructures to Applications, pp 179-208, Ed. Q. Li, Springer: Switzerland, 2014. View
  6. M. Anthamatten, J. J. Ou, J. Weinfield, and S. H. Chen, "Enthalpy versus Entropy: What Drives Hard-Particle Ordering in Condensed Phases?" Chem. Phys. Lett. 660, 18-21 (2016). View

GLASSY LIQUID CRYSTAL SLIDE SHOW

PHOTOALIGNMENT SLIDE SHOW

COMPLETE LIST OF REFEREED PUBLICATIONS

PATENTS