Journal ArticleDOI
Highly efficient band-edge emission from InP quantum dots
TLDR
High quality InP quantum dots with diameters ranging from 25 to 45 A, have been prepared; these quantum dots (QDs) show high quantum yields for band-edge photoluminescence (lowest energy HOMO•LUMO transition) as discussed by the authors.Abstract:
High quality InP quantum dots with diameters ranging from 25 to 45 A, have been prepared; these quantum dots (QDs) show high quantum yields for band‐edge photoluminescence (lowest energy HOMO‐LUMO transition). The wavelength of the blue‐shifted band‐edge emission ranges from about 575 to 730 nm depending on QD size. The quantum yield for photoluminescence is 30% at 300 K and 60% at 10 K; the multiexponential decay of this emission exhibits lifetimes ranging from 5 to 50 ns. Deep red‐shifted emission due to trapping of carriers in defect states on the QD surface which exhibits lifetimes above 500 ns, has been eliminated by treating the QDs with a dilute solution of HF or NH4F.read more
Citations
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Indium phosphide nanowires as building blocks for nanoscale electronic and optoelectronic devices
TL;DR: The assembly of functional nanoscale devices from indium phosphide nanowires, the electrical properties of which are controlled by selective doping are reported, and electric-field-directed assembly can be used to create highly integrated device arrays from nanowire building blocks.
Journal ArticleDOI
Core/Shell semiconductor nanocrystals.
TL;DR: The fundamental properties and synthesis methods of core/shell and core/multiple shell structures of II- VI, IV-VI, and III-V semiconductors are discussed.
Journal ArticleDOI
Kinetics of II-VI and III-V Colloidal Semiconductor Nanocrystal Growth: “Focusing” of Size Distributions
Journal ArticleDOI
Synthesis of monodisperse spherical nanocrystals.
TL;DR: Mechanistic studies have shown that monodisperse nanocrystals are produced when the burst of nucleation that enables separation of the nucleation and growth processes is combined with the subsequent diffusion-controlled growth process through which the crystal size is determined.
Journal ArticleDOI
Semiconductor quantum dots and quantum dot arrays and applications of multiple exciton generation to third-generation photovoltaic solar cells.
Arthur J. Nozik,Matthew C. Beard,Joseph M. Luther,Matt Law,Randy J. Ellingson,Justin C. Johnson +5 more
TL;DR: The general principles of QD synthesis are summarized using InP as an example and applications of QDs and QD arrays in novel quantum dot PV cells, where multiple exciton generation from single photons could yield significantly higher PV conversion efficiencies are discussed.
References
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Journal ArticleDOI
Advances in photochemistry
TL;DR: In this article, the authors discuss advances in photochemistry and photochemistry advances in the field of photochemistry, and propose a method to improve photochemical advances in terms of photochemical properties.