Violbarbosa C, Karel J, Kiss J, Gordan OD, Altendorf SG, Utsumi Y, Samant MG, Wu YH, Tsuei KD, Felser C, Parkin SSP (2016)
Publication Type: Journal article
Publication year: 2016
Book Volume: 113
Pages Range: 11148-11151
Journal Issue: 40
Optically transparent conducting materials are essential in modern technology. These materials are used as electrodes in displays, photovoltaic cells, and touchscreens; they are also used in energy-conserving windows to reflect the infrared spectrum. The most ubiquitous transparent conducting material is tin-doped indium oxide (ITO), a wide-gap oxide whose conductivity is ascribed to n-type chemical doping. Recently, it has been shown that ionic liquid gating can induce a reversible, nonvolatile metallic phase in initially insulating films of WO3 . Here, we use hard X-ray photoelectron spectroscopy and spectroscopic ellipsometry to show that the metallic phase produced by the electrolyte gating does not result from a significant change in the bandgap but rather originates from new in-gap states. These states produce strong absorption below ∼1 eV, outside the visible spectrum, consistent with the formation of a narrow electronic conduction band. Thus WO
APA:
Violbarbosa, C., Karel, J., Kiss, J., Gordan, O.-D., Altendorf, S.G., Utsumi, Y.,... Parkin, S.S.P. (2016). Transparent conducting oxide induced by liquid electrolyte gating. Proceedings of the National Academy of Sciences of the United States of America, 113(40), 11148-11151. https://doi.org/10.1073/pnas.1611745113
MLA:
Violbarbosa, Carlos, et al. "Transparent conducting oxide induced by liquid electrolyte gating." Proceedings of the National Academy of Sciences of the United States of America 113.40 (2016): 11148-11151.
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