Journal ArticleDOI
Determination of quantum confinement in CdSe nanocrystals by cyclic voltammetry
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In this article, the electron affinities of CdSe nanocrystals were determined by means of cyclic voltammetry and the results were compared to values obtained from spectroscopic measurements, especially UV/vis absorption and photoluminescence emission spectra.Abstract:
Ionization potentials Ip, electron affinities E.A., and the quantum confinement in CdSe nanocrystals were determined by means of cyclic voltammetry. The results were compared to values obtained from spectroscopic measurements, especially UV/vis absorption and photoluminescence emission spectra. Absolute band gap positions were obtained from the electrochemical measurements and discussed with regard to vacuum level values. The results are in good agreement with theoretical expectations and spectroscopic data.read more
Citations
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Quantum Dots and Their Multimodal Applications: A Review
TL;DR: In this paper, the decoupling of quantum effects on excitation and emission is described, along with the use of quantum dots as sensitizers in phosphors, and the multimodal applications of quantum dot, including in electroluminescence device, solar cell and biological imaging.
Journal ArticleDOI
Nitrogen-Doped Graphene Oxide Quantum Dots as Photocatalysts for Overall Water-Splitting under Visible Light Illumination
TL;DR: Nitrogen-doped graphene oxide quantum dots exhibit both p- and n-type conductivities and catalyze overall water-splitting under visible-light irradiation, and the reaction mimics biological photosynthesis.
Journal ArticleDOI
Size-dependent valence and conduction band-edge energies of semiconductor nanocrystals.
TL;DR: This work investigates the size-dependent valence and conduction band-edge energies of CdSe, CdTe, PbS, and PbSe semiconductor quantum dots (QDs) through the use of photoelectron spectroscopy in air (PESA).
Journal ArticleDOI
Organic - Inorganic Hybrid Solar Cells: A Comparative Review
Matthew Wright,Ashraf Uddin +1 more
TL;DR: In this article, the state of the art for bulk heterojunction organic-inorganic hybrid solar cells is presented. But, the design of the inorganic material used as the electron acceptor, particularly the electronic structure, is crucial to the performance of the device and there exists an optimal electronic structure design for an inorganic acceptor.
Journal ArticleDOI
Beyond labels: a review of the application of quantum dots as integrated components of assays, bioprobes, and biosensors utilizing optical transduction.
TL;DR: A comprehensive review of the development of assays, bioprobes, and biosensors using quantum dots (QDs) as integrated components is presented, and the basic concepts and principles underlying the use of QDs with each of these transduction methods are provided.
References
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Journal ArticleDOI
Semiconductor Nanocrystals as Fluorescent Biological Labels
TL;DR: Semiconductor nanocrystals prepared for use as fluorescent probes in biological staining and diagnostics have a narrow, tunable, symmetric emission spectrum and are photochemically stable.
Journal ArticleDOI
Quantum Dot Bioconjugates for Ultrasensitive Nonisotopic Detection
Warren C. W. Chan,Shuming Nie +1 more
TL;DR: Highly luminescent semiconductor quantum dots (zinc sulfide-capped cadmium selenide) have been covalently coupled to biomolecules for use in ultrasensitive biological detection and these nanometer-sized conjugates are water-soluble and biocompatible.
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Hybrid Nanorod-Polymer Solar Cells
TL;DR: It is demonstrated that semiconductor nanorods can be used to fabricate readily processed and efficient hybrid solar cells together with polymers and Tuning the band gap by altering the nanorod radius enabled us to optimize the overlap between the absorption spectrum of the cell and the solar emission spectrum.
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Electron–electron and electron‐hole interactions in small semiconductor crystallites: The size dependence of the lowest excited electronic state
TL;DR: In this paper, the excited electronic states of semiconductor crystallites sufficiently small (∼50 A diam) that the electronic properties differ from those of bulk materials were modeled, and an approximate formula was given for the lowest excited electronic state energy.