Dr. Nigel Sheperd heads the Optoelectronics and Thin Films Laboratory (OTFL). Their main focus is the growth of compound semiconductor thin films, and understanding their optical and carrier transport properties with the aim of engineering better power and external quantum efficiencies in solid state lighting and solar cell applications, along with higher switching speeds and lower power consumption for transistor applications.
Kuo, F., Li, Y., Solomon, M., and Shepherd, N. D. (2012). Workfunction tuning of zinc oxide films by argon sputtering and oxygen plasma: An experimental and computational study. Journal of Physics D: Applied Physics, 45, 065301.
Maneshian, M. H., Kuo F-L., Mahdak, K. C., Hwang, J. Y., Banerjee, R., and Shepherd, N. D. (2011). The influence of high dielectric constant aluminum oxide sputter deposition on the structure and properties of multilayer epitaxial grapheme. Nanotechnology, 22(20), 205703-1 – 205703-7.
Lin, M-T., Li, M., Chen, W-H., Omary, M. A., and Shepherd, N. D. (2011). Transient electroluminescence determination of carrier mobility and charge trapping effects in heavily doped phosphorescent organic light-emitting diodes. Solid-State Electronics, 56(1), 196-200.
Li, M., Lin., M., Chen, J., McDougald Jr., R., Arvapally, R., Omary, M., and Shepherd, N.D. (2012). High efficency orange-red phophorescent organic light emitting diodes based on a Pt(II)-pyridyltriazolate complex from a structure optimized for charge balance and reduced efficiency roll-off. Physica Status Solidi A, 209(1), 221.
Kuo, F-L., Maneshian, M. H., and Shepherd, N. D. (2011). Electrical and chemical analysis of zinc oxide interfaces with highdielectric constant barium tantalate and aluminum oxide in metal-insulator-semiconductor structures fabricated at low temperatures. Thin Solid Films, 520(1), 475-480.
Li, M., Chen, W., Lin, M., Oswald, I., Omary, M., and Shepherd, N.D. (2011). High efficiency electrophosphorescence from bilayer organic light emitting diodes. Journal of Physics: D Applied Physics, 44, 365103.
Maneshian, M. H., Mahdak, K. C., Kuo, F.L., Hwang, J.Y., Banerjee, R. and Shepherd, N. D. (2010). Atomic scale characterization of titanium Ohmic contacts to SiC using three dimensional atom probe tomography and high resolution transmission electron microscopy. Applied Physics Letters, 97, 024103-1 – 024103-3.
Li, M., Chen, W-H., Lin, M-T., Omary, M. A., and Shepherd, N. D. (2009). Near-white and tunable electrophosphorescence from bis[3,5-bis(2-pyridyl)-1,2,4-triazolato]platinum(II) based organic light emitting diodes. Organic Electronics, 20, 863-870.
