Journal ArticleDOI
Band structure of lead sulphide
TLDR
The band structure of lead sulphide has been investigated using angle-resolved photoemission, with synchrotron radiation in the photon energy range 25-95 eV as the excitation source as mentioned in this paper.Abstract:
The band structure of lead sulphide has been investigated using angle-resolved photoemission, with synchrotron radiation in the photon energy range 25-95 eV as the excitation source. Many spectral features originate from direct transitions, while others are due to 'density of state' features, i.e. they arise from electrons scattered into the observation direction. Good agreement was found between the experimental spectra and transitions expected on the basis of the calculated linearized muffin-tin-orbital (LMTO) band structure and free electron final states. Partial yield spectra at the Pb O4,5 edge are also reported, from which it is concluded that the exciton energy in lead chalcogenides is not anomalously large, in contradiction to previous work.read more
Citations
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Journal ArticleDOI
The absolute energy positions of conduction and valence bands of selected semiconducting minerals
Yong Xu,Martin A.A. Schoonen +1 more
TL;DR: In this article, the absolute energy positions of conduction and valence band edges were compiled for about 50 each semiconducting metal oxide and metal sulfide minerals, and the relationship between energy levels at mineral semiconductor-electrolyte interfaces and the activities of these minerals as a catalyst or photocatalyst in aqueous redox reactions were reviewed.
Journal ArticleDOI
Confinement effects in PbSe quantum wells and nanocrystals
Guy Allan,Christophe Delerue +1 more
TL;DR: In this paper, the effect of quantum confinement in PbSe quantum wells and dots was studied using tight binding calculations, and unusual physical properties were predicted for rock salt PbS nanostructures.
Journal ArticleDOI
Synthesis and Characterization of PbSe Quantum Wires, Multipods, Quantum Rods, and Cubes
TL;DR: In this article, free-standing PbSe nanocrystals, including quantum wires, multipods, quantum rods, quantum dots, and cubes, were produced in a colloidal solution in the presence of alkyl-diamine solvent at 10−117 °C.
Journal ArticleDOI
PbSe/PbS and PbSe/PbSexS1-x Core/Shell Nanocrystals
Maya Brumer,Ariel Kigel,Lilac Amirav,Aldona Sashchiuk,Olga Solomesch,Nir Tessler,Efrat Lifshitz +6 more
TL;DR: In this article, a two-stage process was used to synthesize PbSe/PbS and Pbse/pbse x S 1 - x core/shell nanocrystals with luminescence quantum efficiencies of 45-55 %.
Journal ArticleDOI
Synthesis and characterization of PbSe and PbSe/PbS core–shell colloidal nanocrystals
TL;DR: In this article, a colloidal procedure for the synthesis of PbSe and PbS core-shell semiconductor nanocrystals (NCs) was reported, which includes the reaction between tributyl-phosphine selenium and lead 2-ethylhexanoate, under inert gas at room temperature.
References
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Journal ArticleDOI
Self-interaction correction to density-functional approximations for many-electron systems
John P. Perdew,Alex Zunger +1 more
TL;DR: In this paper, the self-interaction correction (SIC) of any density functional for the ground-state energy is discussed. But the exact density functional is strictly selfinteraction-free (i.e., orbitals demonstrably do not selfinteract), but many approximations to it, including the local spin-density (LSD) approximation for exchange and correlation, are not.
Journal ArticleDOI
Ground state of the electron gas by a stochastic method
David M. Ceperley,Berni J. Alder +1 more
TL;DR: An exact stochastic simulation of the Schroedinger equation for charged Bosons and Fermions was used to calculate the correlation energies, to locate the transitions to their respective crystal phases at zero temperature within 10%, and to establish the stability at intermediate densities of a ferromagnetic fluid of electrons.
Journal Article
The ground state of the electron gas by a stochastic method
TL;DR: The results of the election were reported by the National Resource for Computing in Chemistry (NCI) as discussed by the authors, a non-profit organization for information technology in the chemical industry, which is based at the Berkeley Lab.
Journal ArticleDOI
Linear methods in band theory
TL;DR: In this article, the authors proposed a method to improve our understanding of the behavior of real solids by using calculations of the electronic structure of real molecules and solids in order to improve the search for new and better materials.
Journal ArticleDOI
Surface photovoltage effects in photoemission from metal-GaP(110) interfaces: Importance for band bending evaluation.
TL;DR: The presence of a surface photovoltage seriously affects the determination of surface band bending by photoelectron spectroscopy.