Journal ArticleDOI
Bipolar doping and band-gap anomalies in delafossite transparent conductive oxides.
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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Large Irreversible Lateral Photovoltaic Effect in $ \hbox{Cu}_{2}\hbox{O/Si}$ Heteroepitaxial Junction
TL;DR: In this paper, a rather large irreversible lateral photovoltage effect has been observed in Cu2O/Si heteroepitaxial junctions and a mechanism based on the difference of carrier mobility in each side of the junction was applied, and a diffusion recombination model was later confirmed experimentally by applying an external bias.
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Electronic band structures and excitonic properties of delafossites: A GW-BSE study
TL;DR: In this paper, the authors reported the band structures and excitonic properties of delafossites CuMO2 (M=Al, Ga, In, Sc, Y, Cr) calculated using the state-of-the-art GW-BSE approach.
Journal ArticleDOI
Employing surfactant-assisted hydrothermal synthesis to control CuGaO2 nanoparticle formation and improved carrier selectivity of perovskite solar cells
Ioannis T. Papadas,Achilleas Savva,Apostolos Ioakeimidis,Polyvios Eleftheriou,Gerasimos S. Armatas,Stelios A. Choulis +5 more
TL;DR: In this paper, a novel surfactant-assisted hydrothermal synthesis method was proposed for the development of ultrafine (∼5nm) monodispersed p-type CuGaO 2 nanoparticles (NPs).
Journal ArticleDOI
Recent progress in the development of hole-transport materials to boost the power conversion efficiency of perovskite solar cells
TL;DR: In this article, a brief look on the advancement in the field of perovskite solar cells and how to achieve the best performance via adjusting the hole transport material is presented.
Journal ArticleDOI
Electronic Band Structures and Excitonic Properties of Delafossites: A $\textit{GW}$-BSE study
TL;DR: In this article, the authors report the band structures and excitonic properties of delafossites and find that all the delafosites are indirect band gap semiconductors with large exciton binding energies, varying from 0.24 to 0.44 eV.