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
First-principles study of direct and narrow band gap semiconducting β -CuGaO2
TL;DR: In this paper, first-principles density functional theory calculations were performed to investigate the thermodynamic and mechanical stabilities as well as the structural and electronic properties of the?-CuGaO2 phase.
Journal ArticleDOI
Al doping for bipolarity induction in transparent conducting CuInO2 and its application in diode fabrication
Bindu G. Nair,Hilal Rahman,Vikash Sharma,Gunadhor S. Okram,Uday Deshpande,V. Ganesan,Rachel Reena Philip +6 more
TL;DR: The suitability of the doped thin films in transparent device fabrication is verified by construction and characterization of a diode with configuration FTO/n-CIO:Sn/p-CIA:Al/Ag.
Journal ArticleDOI
Enhanced performance of solar cells vi a anchoring CuGaS 2 quantum dots
Jinjin Zhao,Jinjin Zhao,Zhenghao Liu,Hao Tang,Jia Chunmei,Xingyu Zhao,Feng Xue,Liyu Wei,Kong Guoli,Chen Wang,Jinxi Liu +10 more
TL;DR: In this article, ternary chalcopyrite CuGaS2 nanocrystals (2-5µnm) were one-pot anchored on TiO2 nanoparticles (TiO2@CGS) without any long ligand.
Journal ArticleDOI
Hydrothermal synthesis and photocatalytic properties of CuGaO2/ZnO hexagonal platelet hybrids
Min Uk Choi,Tomokatsu Hayakawa +1 more
TL;DR: In this paper, a hexagonal-platelet CuGaO2 was synthesized using a hydrothermal method, which can also be adapted to the synthesis of the CuO2/ZnO hybrids.
Journal ArticleDOI
The electronic structure of SrCu2O2 studied by synchrotron radiation excited photoemission and hybrid exchange density functional calculations
J. P. Hu,David J. Payne,Russell G. Egdell,Nicholas M. Harrison,Nicholas M. Harrison,Vin Dhanak +5 more
TL;DR: In this article, the spectra of K-doped SrCu2O2 excited with vacuum ultraviolet synchrotron radiation have been measured over a range of photon energies between 36 eV and 164 eV.