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
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Journal ArticleDOI
Calcium incorporated copper indium oxide thin films - a promising candidate for transparent electronic applications
Bindu G. Nair,Hilal Rahman,Aijo John K,K. Keerthi,Sadasivan Shaji,Gunadhor S. Okram,Vikash Sharma,Rachel Reena Philip +7 more
TL;DR: In this paper, the ideality factor and turn on voltage of transparent diodes are determined as ~1.1 and 0.68 respectively while for the latter types they are ~2.38 and ~ 0.5 V respectively, and the structural, morphological, optoelectronic and electrical properties of delafossite crystalline p-type calcium doped copper indium oxide thin films are discussed.
Journal ArticleDOI
Enhanced performance of self-powered ultraviolet photodetectors coupled with the photovoltaic-pyroelectric effect based on ZnO/CuBO2 core-shell nanorod arrays
TL;DR: In this article , an innovative self-powered ultraviolet photodetector based on ZnO/CuBO 2 core-shell nanorod arrays was fabricated using cost-efficient and scalable preparation technologies, including a chemical hydrothermal method and an impregnation technique.
Journal ArticleDOI
Double perovskite Ba2BiTaO6 as a promising p-type transparent conductive oxide: A first-principles defect study
TL;DR: In this article, double perovskite Ba2BiTaO6 has been shown to exhibit a dispersive upper valence band and a small hole effective mass due to the strong sp antibonding coupling.
Journal ArticleDOI
Layered CeSO and LiCeSO Oxide Chalcogenides Obtained via Topotactic Oxidative and Reductive Transformations.
Simon J. Cassidy,Michael J. Pitcher,Jared J. K. Lim,Joke Hadermann,Jeremy P. Allen,Graeme W. Watson,Sylvia Britto,Elena J. Chong,David G. Free,Clare P. Grey,Simon J. Clarke +10 more
TL;DR: The chemical accessibility of the CeIV oxidation state enables redox chemistry to be performed on the naturally coinage-metal-deficient phases CeM1- xSO (M = Cu, Ag) and Computation of the band structure of pure, stoichiometric CeSO predicts it to be a Ce4+ compound with the 4f-states lying approximately 1 eV above the sulfide-dominated valence band maximum.
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Influence of nitrogen-doping concentration on the electronic structure of CuAlO2 by first-principles studies
TL;DR: In this article, the effect of N doping concentration on the electronic structure of N-doped CuAlO 2 was investigated by density functional theory based on generalized gradient approximation plus orbital potential.