Developing Mn-doped lead sulfide quantum dots for MRI labels

Two photon absorption in Mn-doped ZnSe quantum dots

0030-4018/$ see front matter 2010 Elsevier B.V. A doi:10.1016/j.optcom.2010.01.053 * Corresponding author. E-mail addresses: [email protected] (G.R. Kumar), sh (S. Mahamuni). 1 Present address: K.J. Somaiya College of Sc. & Comm 077, India. The nonresonant third order nonlinear optical properties of three different sized Mn-doped ZnSe quantum dots (QDs) are investigated. The nonlinear absorption ...

Carrier relaxation dynamics in lead sulfide colloidal quantum dots.

We report transient absorption saturation measurements on lead sulfide colloidal nanocrystals at the first and second exciton energies and fit the results to a model incorporating intraband and interband relaxation processes. We study in detail the Auger recombination from the first excited state, which takes place when more than one electron-hole pair is excited in a dot. We find an Auger coef...

Pulsed laser deposition of Mn doped CdSe quantum dots for improved solar cell performance

ZnS Cu-doped quantum dots

The paper presents a survey of literature on the structure and optical properties of ZnS and copper ion-doped ZnS quantum dots. The effect of other metal dopants on the spectral properties of ZnS:Cu quantum dots was also considered. The influence of such parameters as dopant concentration, temperature of the synthesis and compounds which form or modify the additional layer on dots on spectral p...

Water-based route to colloidal Mn-doped ZnSe and core/shell ZnSe/ZnS quantum dots.

Relatively monodisperse and highly luminescent Mn(2+)-doped zinc blende ZnSe nanocrystals were synthesized in aqueous solution at 100 °C using the nucleation-doping strategy. The effects of the experimental conditions and of the ligand on the synthesis of nanocrystals were investigated systematically. It was found that there were significant effects of molar ratio of precursors and heating time...