Ideal transparent conductors for full spectrum photovoltaics

Kin Man Yu; Marie A. Mayer; Derrick T. Speaks; Hongcai He; Ruying Zhao; L. Hsu; Samuel S. Mao; E. E. Haller; Wladek Walukiewicz

doi:10.1063/1.4729563

Ideal transparent conductors for full spectrum photovoltaics

Kin Man Yu, Marie A. Mayer, Derrick T. Speaks, Hongcai He, Ruying Zhao, L. Hsu, Samuel S. Mao, E. E. Haller, Wladek Walukiewicz

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Abstract

In current technologies, state-of-the-art transparent conducting oxides exhibit good conductivity (∼5×10 ³ S/cm) and transparency up to only λ ∼ 1000 nm, restricting the use of such thin films to photovoltaics that are not utilizing the infrared part of the solar spectrum. We have found that among metal oxides, high electron mobility CdO satisfies the essential requirements for a low resistance and high infrared transmission transparent contact. With appropriate intentional doping, we have achieved ideal uncompensated CdO with extremely high conductivity (>10 ⁴ S/cm) and an excellent transmission window in the range from 400 to >1500 nm, making this material an ideal TCO for photovoltaics with low band gap absorbers.

Original language	English (US)
Article number	123505
Journal	Journal of Applied Physics
Volume	111
Issue number	12
DOIs	https://doi.org/10.1063/1.4729563
State	Published - Jun 15 2012

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AU - Zhao, Ruying

AU - Hsu, L.

AU - Mao, Samuel S.

AU - Haller, E. E.

AU - Walukiewicz, Wladek

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Ideal transparent conductors for full spectrum photovoltaics

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