Journal ArticleDOI
Bipolar doping and band-gap anomalies in delafossite transparent conductive oxides.
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TLDR
It is shown that both properties are results of a large disparity between the fundamental gap and the apparent optical gap, a finding that could lead to a breakthrough in the study of bipolarly dopable wide-gap semiconductor oxides.Abstract:
Doping wide-gap materials p type is highly desirable but often difficult. This makes the recent discovery of p-type delafossite oxides, CuM(III)O2, very attractive. The CuM(III)O2 also show unique and unexplained physical properties: Increasing band gap from M(III) = Al,Ga, to In, not seen in conventional semiconductors. The largest gap CuInO2 can be mysteriously doped both n and p type but not the smaller gaps CuAlO2 and CuGaO2. Here, we show that both properties are results of a large disparity between the fundamental gap and the apparent optical gap, a finding that could lead to a breakthrough in the study of bipolarly dopable wide-gap semiconductor oxides.read more
Citations
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Journal ArticleDOI
Understanding doping anomalies in degenerate p-type semiconductor LaCuOSe
TL;DR: In this article, the authors used screened hybrid density functional theory to study both intrinsic and extrinsic defects in LaCuOSe, and identify the source of charge carriers in this system.
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Ternary cobalt spinel oxides for solar driven hydrogen production: Theory and experiment
Aron Walsh,Kwang Soon Ahn,Sudhakar Shet,Muhammad N. Huda,Todd G. Deutsch,Heli Wang,John A. Turner,Su-Huai Wei,Yanfa Yan,Mowafak Al-Jassim +9 more
TL;DR: In this paper, the authors presented a combined theoretical and experimental exploration of a series of unconventional ternary cobalt spinel oxides, which offer chemical functionality through substitution on the octahedral spinel B site.
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Electrical transport and structural study of CuCr1 − xMgxO2 delafossite thin films grown by pulsed laser deposition
Journal Article
Ternary cobalt spinel oxides for solar driven hydrogen production: Theory and experiment
Aron Walsh,Kwang-Soon Ahn,Sudhakar Shet,Muhammad N. Huda,Todd G. Deutsch,Heli Wang,John A. Turner,Yanfa Yan,Mowafak Al-Jassim,Su-Huai Wei +9 more
TL;DR: In this paper, the authors presented a combined theoretical and experimental exploration of a series of unconventional ternary cobalt spinel oxides, which offer chemical functionality through substitution on the octahedral spinel B site.
Journal ArticleDOI
On the metallic conductivity of the delafossites PdCoO2 and PtCoO2
TL;DR: In this article, the origin of the quasi-two-dimensional behavior of PdCoO2 and PtCoO 2 was investigated by means of electronic structure calculations using density functional theory in the generalized gradient approximation as well as the new full-potential augmented spherical wave method.