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John F. Wager

Professor
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.

Research group: 
Materials and Devices
Research Interests: 

Research Areas

Current research topics under investigation include transparent electronics, intelligent luminescence, solar cells, and low-cost electronics.



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.

Teaching: 
ECE 417 BASIC SEMICONDUCTOR DEVICES

Publications

In Press
Yeh, and J. F. Wager, "Interface state estimation of thin-film transistors with amorphous oxide semiconductor channel layers", J. Appl. Phys, In Press.
2011
Wager, J. F., "Oxide Thin-Film Transistors", Handbook of Visual Display Technology, vol. 1, 2011.
2010
Cowell, III, 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, 10/2010.
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
Cowell, III, 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, 2010. Abstract
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
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
2008
Hong, D., G. Yerubandi, H. Q. Chiang, M. C. Spiegelberg, and J. F. Wager, "Electrical Modeling of Thin-Film Transistors", Critical Reviews in Solid State and Materials Sciences, vol. 33, issue 2, pp. 101 - 132, 4/2008. Abstract
Meyers, S. T., J. T. Anderson, C. M. Hung, J. Thompson, J. F. Wager, and D. A. Keszler, "Aqueous Inorganic Inks for Low-Temperature Fabrication of ZnO TFTs", Journal of the American Chemical Society, vol. 130, issue 51, pp. 17603 - 17609, 12/2008. Abstract
Wager, J. F., "A simple procedure for electroluminescent phosphor assessment", Journal of Luminescence, vol. 128, issue 11, pp. 1851 - 1855, 11/2008. Abstract
Wager, J. F., "Electroluminescent phosphor assessment", International Conference on Inorganic and Organic Electroluminescence, Tivoli, Italy, pp. 417-419, 09/2008.
Erslev, P. T., H. Q. Chiang, D. Hong, J. F. Wager, and D. J. Cohen, "Electronic properties of amorphous zinc tin oxide films by junction capacitance methods", Journal of Non-Crystalline Solids, vol. 354, issue 19-25, pp. 2801 - 2804, 05/2008. Abstract
Chiang, H. Q., B. R. McFarlane, D. Hong, R. E. Presley, and J. F. Wager, "Processing effects on the stability of amorphous indium gallium zinc oxide thin-film transistors", Journal of Non-Crystalline Solids, vol. 354, issue 19-25, pp. 2826 - 2830, 05/2008. Abstract
Wager, J. F., "Transparent electronics: Schottky barrier and heterojunction considerations", Thin Solid Films, vol. 516, issue 8, pp. 1755 - 1764, 02/2008. Abstract
Wager, J. F., D. A. Keszler, and R. E. Presley, Transparent Electronics, : Springer, pp. 212, 2008.
2007
Wager, J. F., "Invited Paper: Transparent Electronics — Display Applications?", SID Symposium Digest of Technical Papers, vol. 38, issue 1, pp. 1824-1825 , 2007. Abstract
Wager, J. F., "Transparent Electronics: An Enabling Display Technology?", IDMC’07, pp. 369-370, 2007.
Anderson, J. T., C. L. Munsee, C. M. Hung, T. M. Phung, G. S. Herman, D. C. Johnson, J. F. Wager, and D. A. Keszler, "Solution-Processed HafSOx and ZircSOx Inorganic Thin-Film Dielectrics and Nanolaminates", Advanced Functional Materials, vol. 17, issue 13, pp. 2117 - 2124, 09/2007. Abstract
Meyers, S. T., J. T. Anderson, D. Hong, C. M. Hung, J. F. Wager, and D. A. Keszler, "Solution-Processed Aluminum Oxide Phosphate Thin-Film Dielectrics", Chemistry of Materials, vol. 19, issue 16, pp. 4023 - 4029, 08/2007.
Grover, M. S., P. A. Hersh, H. Q. Chiang, E. S. Kettenring, J. F. Wager, and D. A. Keszler, "Thin-film transistors with transparent amorphous zinc indium tin oxide channel layer", Journal of Physics D: Applied Physics, vol. 40, issue 5, pp. 1335 - 1338, 03/2007. Abstract

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