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287 results on '"Efstathiadis, Harry"'

103. Electrode Reaction Mechanism of Ag2VO2PO4 Cathode

Author

Zhang, Ruibo, primary, Abtew, Tesfaye A., additional, Quackenbush, Nicholas F., additional, Wangoh, Linda W., additional, Huie, Matthew, additional, Brady, Alexander B., additional, Bock, David, additional, Efstathiadis, Harry, additional, Whittingham, M. Stanley, additional, Marschilok, Amy C., additional, Takeuchi, Kenneth J., additional, Takeuchi, Esther S., additional, Zhang, Peihong, additional, and Piper, Louis F. J., additional

Published
2016
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105. Review of Graphene Technology and Its Applications for Electronic Devices

Author

Sood, Ashok K., Lund, Isaac, Puri, Yash R., Efstathiadis, Harry, Haldar, Pradeep, Dhar, Nibir K., Lewis, Jay, Dubey, Madan, Zakar, Eugene, Wijewarnasuriya, Priyalal, Polla, Dennis L., Fritze, Michael, Sood, Ashok K., Lund, Isaac, Puri, Yash R., Efstathiadis, Harry, Haldar, Pradeep, Dhar, Nibir K., Lewis, Jay, Dubey, Madan, Zakar, Eugene, Wijewarnasuriya, Priyalal, Polla, Dennis L., and Fritze, Michael

Abstract

Graphene has amazing abilities due to its unique band structure characteristics defining its enhanced electrical capabilities for a material with the highest characteristic mobility known to exist at room temperature. The high mobility of graphene occurs due to electron delocalization and weak electron–phonon interaction, making graphene an ideal material for electrical applications requiring high mobility and fast response times. In this review, we cover graphene’s integration into infrared (IR) devices, electro-optic (EO) devices, and field effect transistors (FETs) for radio frequency (RF) applications. The benefits of utilizing graphene for each case are discussed, along with examples showing the current state-of-the-art solutions for these applications.

Published
2015
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130. Electrode Reaction Mechanism of Ag2VO2PO4 Cathode.

Author

Ruibo Zhang, Abtew, Tesfaye A., Quackenbush, Nicholas F., Wangoh, Linda W., Huie, Matthew, Brady, Alexander B., Bock, David, Efstathiadis, Harry, Whittingham, M. Stanley, Marschilok, Amy C., Takeuchi, Kenneth J., Takeuchi, Esther S., Peihong Zhang, and Piper, Louis F. J.

Published
2016
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145. Highly transparent conductive electrode with ultra-low HAZE by grain boundary modification of aqueous solution fabricated alumina-doped zinc oxide nanocrystals.

Author

Qiong Nian, Callahan, Michael, Look, David, Efstathiadis, Harry, Bailey, John, and Cheng, Gary J.

Subjects
ZINC oxide, ALUMINUM oxide, CRYSTAL grain boundaries, AQUEOUS solutions, ULTRAVIOLET lasers, NANOCRYSTALS spectra, ELECTRODE efficiency, ELECTRIC conductivity
Abstract

Commercial production of transparent conducting oxide (TCO) polycrystalline films requires high electrical conductivity with minimal degradation in optical transparency. Aqueous solution deposited TCO films would reduce production costs of TCO films but suffer from low electrical mobility, which severely degrades both electrical conductivity and optical transparency in the visible spectrum. Here, we demonstrated that grain boundary modification by ultra-violet laser crystallization (UVLC) of solution deposited aluminium-doped zinc oxide (AZO) nanocrystals results in high Hall mobility, with a corresponding dramatic improvement in AZO electrical conductance. The AZO films after laser irradiation exhibit electrical mobility up to 18.1 cm² V-1 s-1 with corresponding electrical resistivity and sheet resistances as low as 1 × 10−3 Ω cm and 75 Ω/sq, respectively. The high mobility also enabled a high transmittance (T) of 88%-96% at 550 nm for the UVLC films. In addition, HAZE measurement shows AZO film scattering transmittance as low as 1.8%, which is superior over most other solution deposited transparent electrode alternatives such as silver nanowires. Thus, AZO films produced by the UVLC technique have a combined figure of merit for electrical conductivity, optical transparency, and optical HAZE higher than other solution based deposition techniques and comparable to vacuumed based deposition methods. [ABSTRACT FROM AUTHOR]

Published
2015
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