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
Opto‐electronic properties and light‐emitting device application of widegap layered oxychalcogenides: LaCuOCh (Ch = chalcogen) and La2CdO2Se2
Hidenori Hiramatsu,Hayato Kamioka,Hayato Kamioka,Kazushige Ueda,Kazushige Ueda,Hiromichi Ohta,Hiromichi Ohta,Toshio Kamiya,Masahiro Hirano,Hideo Hosono +9 more
TL;DR: In this paper, the authors reviewed the electronic and optical properties of wide-gap oxychalcogenides, LaCuOCh (Ch = chalcogen) and La 2 CdO 2 Se 2, with a focus on those relevant to their layered crystal structures, including high hole mobility, degenerate p-type conduction, room temperature exciton and large third order optical nonlinearity.
Journal ArticleDOI
p-type electrical conduction in α-AgGaO2 delafossite thin films
TL;DR: In this article, thin films of delafossites of α-AgGaO2 were prepared on α-Al2O3 (0001) and on Si (100) single crystal substrates by pulsed laser deposition.
Journal ArticleDOI
Recent Advancements in Crystalline Pb-Free Halide Double Perovskites
Muhammad Usman,Qingfeng Yan +1 more
TL;DR: In this article, the synthesis, composition-tuning, physical properties, and applications of representative 3D, 2D, and nanocrystal A2B’B'B'X6 double perovskites are introduced.
Journal ArticleDOI
Electronic transition and electrical transport properties of delafossite CuCr1−xMgxO2 (0 ≤ x ≤ 12%) films prepared by the sol-gel method: A composition dependence study
TL;DR: In this article, high-spectral transmittance and higher electrical conductivity of Mg-doped CuCrO2 films were investigated for optoelectronic device applications.
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Sol – gel synthesis, structural characterization and bifunctional catalytic activity of nanocrystalline delafossite CuGaO2 particles
TL;DR: In this paper, the average size of CuGaO 2 nanoparticles of ∼40nm was determined by transmission electron microscopy, and the current densities of these nanoparticles as the bifunctional catalysts were found to be 15 and 18 µm 2 for H 2 and O 2 generation, respectively, using 0.5 m KOH solution as an electrolyte versus Ag/AgCl electrode.