John F. Wager

Professor
Michael and Judith Gaulke Chair
Electrical & Computer Engineering
Web Page: 
http://eecs.oregonstate.edu/~jfw/
Learn more about John Wager
Education: 
  • B.S., Engineering Physics, Oregon State University, 1977
  • M.S., Electrical Engineering, Colorado State University, 1978
  • Ph.D., Electrical Engineering, Colorado State University, 1981
Biography: 

John F. Wager received the B.S. degree in Engineering Physics from Oregon State University in 1977 and the M.S. and Ph.D. degrees in Electrical Engineering from Colorado State University in 1978 and 1981, respectively.

From 1982-1984 he worked at Hughes Research Laboratories where he was involved in the development of compound semiconductor devices for high-speed and optoelectronic applications. He joined the Department of Electrical and Computer Engineering at Oregon State University in 1984, and is currently a professor in the School of EECS.

Wager received the Loyd Carter Award for outstanding and inspirational teaching in the OSU College of Engineering in 1989, the OSU College of Engineering Alumni Professor Award for outstanding scholarly contributions to the College and to the University in 1996, and the OSU College of Engineering Research Award for outstanding and sustained research leadership in 2000. His specialization and research focus is in the area of solid-state materials and devices. Recent research thrusts include transparent electronics, printed electronics, and photovoltaics.

Wager is an IEEE Fellow.

Research group: 
Materials and Devices
Research Interests: 

Research Areas
Transparent electronics, oxide electronics, printed electronics, MIM electronics, thin-film photovoltaics, and nanolaminate metamaterials.

Research Description
Transparent electronics is a nascent technology involving the realization of invisible electronic circuits. For this purpose, we are developing new types of transparent materials, devices, and circuits.

The idea underlying intelligent luminescence is to first integrate sensor, processor, and actuator capabilities together into a smart pixel, and then to densely interconnect such smart pixels via nonlinear feedback in such a manner that emergent behavior characteristic of intelligence is achieved. We believe that transparent electronics/optoelectronics offers an excellent platform for constructing such intelligent luminescent systems. As an initial step in this direction, we are working to fabricate first a transparent pixel and then a transparent display.

Thin-film solar cells constitute an attractive approach to clean, renewable, and affordable energy. Some materials that we have recently been exploring appear to have properties well-suited to photovoltaic applications. We believe that by employing such materials in a pin double heterojunction configuration, we will be able to improve thin-film solar cell efficiency and lifetime using inexpensive, environmentally 'green' material constituents.

The goal of our low-cost electronics effort is to identify appropriate thin-film materials, devices, manufacturing routes, and applications to achieve electronic functionality at a reduced cost.

This research is being undertaken in collaboration with Professor Keszler’s & Sleight’s, Tate’s, and Chang’s groups in the Departments of Chemistry, Physics, and Chemical Engineering, respectively.

Applications of Research
Applications of our research include next generation displays, lighting, solar cells, and smart windows. Possible applications of transparent electronics include select transistors for active-matrix liquid crystal displays and transparent displays.

In Press
Yeh, B., and J. F. Wager, "Interface state estimation of thin-film transistors with amorphous oxide semiconductor channel layers", J. Appl. Phys, In Press.
2012
Cowell, W. E., C. C. Knutson, N. A. Kuhta, W. Stickle, D. A. Keszler, and J. F. Wager, "Engineering anisotropic dielectric response through amorphous laminate structures", Physica Status Solidi (a), vol. 209, issue 4, pp. 777 - 784, 04/2012. Abstract
Alimardani, N., W. E. Cowell, J. F. Wager, J. F. Conley, D. R. Evans, M. Chin, S. J. Kilpatrick, and M. Dubey, "Impact of electrode roughness on metal-insulator-metal tunnel diodes with atomic layer deposited Al2O3 tunnel barriers", Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, vol. 30, issue 1, pp. 01A113, 01/2012. Abstract
Lany, S., A. Zakutayev, T. Mason, J. F. Wager, K. Poeppelmeier, J. Perkins, J. Berry, D. Ginley, and A. Zunger, "Surface Origin of High Conductivities in Undoped In_{2}O_{3} Thin Films", Physical Review Letters, vol. 108, issue 1, 01/2012. Abstract
2011
Wager, J. F., and J. Robertson, "Metal-induced gap states modeling of metal-Ge contacts with and without a silicon nitride ultrathin interfacial layer", Journal of Applied Physics, vol. 109, issue 9, pp. 094501, 2011. Abstract
Pelatt, B. D., R. Ravichandran, J. F. Wager, and D. A. Keszler, "Atomic Solid State Energy Scale", Journal of the American Chemical Society, vol. 133, issue 42, pp. 16852 - 16860, 10/2011. Abstract
Yu, L., S. Lany, R. Kykyneshi, V. Jieratum, R. Ravichandran, B. Pelatt, E. Altschul, H. A. S. Platt, J. F. Wager, D. A. Keszler, et al., "Iron Chalcogenide Photovoltaic Absorbers", Advanced Energy Materials, vol. 1, issue 5, pp. 748 - 753, 10/2011. Abstract
Waggoner, T., J. Triska, K. Hoshino, J. F. Wager, and J. F. Conley, "Zirconium oxide-aluminum oxide nanolaminate gate dielectrics for amorphous oxide semiconductor thin-film transistors", Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, vol. 29, issue 4, pp. 04D115, 07/2011. Abstract
Wager, J. F., and R. Hoffman, "Thin, Fast, and Flexible: amorphous oxide semiconductors promise to makes flat-panel displays faster and sharper than today’s silicon standby", IEEE Spectrum, pp. 42-45, 51-56, 05/2011.
Jiang, K., J. T. Anderson, K. Hoshino, D. Li, J. F. Wager, and D. A. Keszler, "Low-Energy Path to Dense HfO2 Thin Films with Aqueous Precursor", Chemistry of Materials, vol. 23, issue 4, pp. 945 - 952, 02/2011. Abstract
Cowell, W. E., N. Alimardani, C. C. Knutson, J. F. Conley, D. A. Keszler, B. J. Gibbons, and J. F. Wager, "Advancing MIM Electronics: Amorphous Metal Electrodes", Advanced Materials, vol. 23, issue 1, pp. 74 - 78, 01/2011. Abstract
Wager, J. F., "Oxide Thin-Film Transistors", Handbook of Visual Display Technology, vol. 1, 2011.
2010
Alimardani, N., J. F. Conley, E. W. Cowell, J. F. Wager, M. Chin, S. Kilpatrick, and M. Dubey, "Stability and bias stressing of metal/insulator/metal diodes", 2010 IEEE International Integrated Reliability Workshop (IIRW), S. Lake Tahoe, CA, IEEE, pp. 80 - 84, 10/2010. Abstract
Wager, J. F., "Transfer-curve assessment of oxide thin-film transistors", Journal of the Society for Information Display, vol. 18, issue 10, pp. 749–752, 10/2010. Abstract
Hoshino, K., and J. F. Wager, "Operating Temperature Trends in Amorphous In–Ga–Zn–O Thin-Film Transistors", IEEE Electron Device Letters, vol. 31, issue 8, pp. 818 - 820, 08/2010. Abstract
Cowell, III, W. E., C. C. Knutson, J. F. Wager, and D. A. Keszler, "Amorphous Metal/Oxide Nanolaminate", ACS Applied Materials & Interfaces, vol. 2, issue 7, pp. 1811 - 1813, 07/2010. Abstract
Triska, J., J. F. Conley, R. E. Presley, and J. F. Wager, "Bias stress stability of zinc-tin-oxide thin-film transistors with Al2O3 gate dielectrics", Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, vol. 28, issue 4, pp. C5I1, 07/2010. Abstract
McFarlane, B. R., P. Kurahashi, D. P. Heineck, R. E. Presley, E. S. Sundholm, and J. F. Wager, "AC/DC Rectification With Indium Gallium Oxide Thin-Film Transistors", IEEE Electron Device Letters, vol. 31, issue 4, pp. 314 - 316, 04/2010. Abstract
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2009
Erslev, P. T., E. S. Sundholm, R. E. Presley, D. Hong, J. F. Wager, and D. J. Cohen, "Mapping out the distribution of electronic states in the mobility gap of amorphous zinc tin oxide", Applied Physics Letters, vol. 95, issue 19, pp. 192115, 2009. Abstract
Spies, J. A., R. Schafer, J. F. Wager, P. A. Hersh, H. A. S. Platt, D. A. Keszler, G. Schneider, R. Kykyneshi, J. Tate, and X. Liu, "pin double-heterojunction thin-film solar cell p-layer assessment", Solar Energy Materials and Solar Cells, vol. 93, issue 8, pp. 1296 - 1308, 08/2009. Abstract
Wager, J. F., "Invited Paper: Amorphous Oxide Semiconductor Thin-Film Transistors: Performance & Manufacturability for Display Applications", SID Symposium Digest of Technical Papers, vol. 40, issue 1, pp. 181-183, 06/2009. Abstract
Wager, J. F., "Invited Paper: Amorphous Oxide Semiconductor Thin-Film Transistors: Performance & Manufacturability for Display Applications", SID Symposium Digest of Technical Papers, vol. 40, issue 1, pp. 181, 06/2009. Abstract
Hoshino, K., D. Hong, H. Q. Chiang, and J. F. Wager, "Constant-Voltage-Bias Stress Testing of a-IGZO Thin-Film Transistors", IEEE Transactions on Electron Devices, vol. 56, issue 7, pp. 1365 - 1370, 05/2009. Abstract
Heineck, D. P., B. R. McFarlane, and J. F. Wager, "Zinc Tin Oxide Thin-Film-Transistor Enhancement/Depletion Inverter", IEEE Electron Device Letters, vol. 30, issue 5, pp. 514 - 516, 05/2009. Abstract