Pinned emission from ultrasmall cadmium selenide nanocrystals
Albert D. DukesMichael A. SchreuderJessica A. SammonsJames R. McBrideNathanael J. SmithSandra J. Rosenthal
42
Citation
24
Reference
10
Related Paper
Citation Trend
Abstract:
We report pinning of the emission spectrum in ultrasmall CdSe nanocrystals with a diameter of 1.7 nm and smaller. It was observed that the first emission feature ceased to blueshift once the band edge absorption reached 420 nm, though the band edge absorption continued to blueshift with decreasing nanocrystal diameter.Keywords:
Blueshift
Cadmium selenide
Absorption edge
Red shift
Selenide
Cadmium Selenide and Lead Selenide have been the subject of considerable interest because of its potential applications in many fields. In this paper, the synthesis of Cadmium Selenide and Lead Selenide nanostructures is described. The Morphologies of as prepared metal selenide nanostructures are summarized. And the applications and prospects of metal selenide in this field also are analyzed.
Selenide
Cadmium selenide
Lead selenide
Zinc selenide
Cite
Citations (0)
We report pinning of the emission spectrum in ultrasmall CdSe nanocrystals with a diameter of 1.7 nm and smaller. It was observed that the first emission feature ceased to blueshift once the band edge absorption reached 420 nm, though the band edge absorption continued to blueshift with decreasing nanocrystal diameter.
Blueshift
Cadmium selenide
Absorption edge
Red shift
Selenide
Cite
Citations (42)
The photoluminescence properties of hollow ZnS microspheres with different sizes and shell thickness were studied. There exist two emission bands situated in blue and green regions in the photoluminescence spectra of the microspheres: the green band has a red shift with increasing the excitation power at different temperatures, while the blue band has a blue shift at room temperature and without any changes excited at 83 K. The green emission has a normal red shift while the blue emission shows an abnormal red-blue shift with increasing temperature. The origins of anomalous photoluminescence properties were analysed and discussed in terms of the carrier localisation at the defect levels.
Blueshift
Red shift
Stokes shift
Photoluminescence excitation
Cite
Citations (0)
Cadmium selenide
Trioctylphosphine oxide
Selenide
Cadmium oxide
Cite
Citations (5)
The growth of ternary semiconductor thin films of cadmium indium selenide nanofibers has been carried out from aqueous solution of cadmium sulphate, indium trichloride, and selenium dioxide by electrochemical route. These thin films have been further optimized using photoelectrochemical cell (PEC). Optimized thin film has been characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM).
Selenide
Cadmium selenide
Cite
Citations (1)
Selenide
Absorption edge
Blueshift
Cite
Citations (1)
Photoluminescence (PL) behaviour in InN nanocolumns reveal decreasing, increasing and near invariant peak energies (E(PL)) as a function of temperature. Samples, having E(PL)~0.730 eV at 20 K, showed temperature invariance of E(PL). Samples possessing E(PL) on the lower and higher energy side of 0.730 eV demonstrate a normal redshift and anomalous blueshift, respectively, with increasing temperature. This temperature evolution can be effectively explained on the basis of a competition between a conventional red shift from lattice dilation, dominant for low carrier density sample, on one hand, and a blue shift of the electron and hole quasi Fermi-level separation, dominant for high carrier density samples, on the other.
Blueshift
Red shift
Cite
Citations (17)
ZnO/TiO2 nanocomposite films on quartz substrates were prepared by the sol-gel method, and the corresponding optical absorption properties were investigated. In the ultraviolet region, it was found that the position of fundamental absorption edge partially depends on the composition of the ZnO/TiO2 films, and shifts toward a shorter wavelength with the increasing content of ZnO in the films. Moreover, a blueshift of the absorption edge resulted from a quantum size effect and the quantum confinement effect was observed in the ZnO/TiO2 system.
Blueshift
Absorption edge
Ultraviolet
Potential well
Cite
Citations (15)
Cadmium selenide
Selenide
Zinc selenide
Cite
Citations (6)
A new approach to the one-step synthesis of cadmium selenide (CdSe) quantum dots is reported using the air stable complex cadmium imino-bis(diisopropylphosphine selenide); the ligand is readily prepared from elemental selenium and the precursor, quantum dots of comparable quality to those prepared by conventional methods are obtained.
Selenide
Cadmium selenide
Cite
Citations (90)