Transient absorption study on the influence of several polyphenylene vinylene derivatives on the exciton lifetimes in lead(II) sulfide quantum dots

Probing slow dynamics by ultrafast process: Sol–gel transition detected by transient absorption spectroscopy of quantum dots

“…During the gelation process we register the evolution of the lifetimes of the excitons generated in QDs by the laser pulse. It has been shown in our previous papers [19,20] and by other authors [21] that these lifetimes are very sensitive to the environment, in which QDs are dispersed, and which in our study undergo structural transition. Moreover, since the energy band gap in semiconductor nanocrystals depends on their size [22], it can be adjusted to lie beyond the absorption range of the investigated gel.…”

Effect of Mixture Composition on the Photophysics of Indoline Dyes in Imidazolium Ionic Liquid-Molecular Solvent Mixtures: A Femtosecond Transient Absorption Study

“…The Femtosecond transient absorption setup used in this research has already been described elsewhere . The same setup was also used in this study.…”

“…The Femtosecond transient absorption setup used in this research has already been described elsewhere. 83 The same setup was also used in this study. First, laser pulses from the sapphire oscillator (Coherent Micra 10) seed the amplification stage (Coherent Legend Elite), which emits pulses of 3.5 mJ energy and 45 fs time duration, centered at 800 nm.…”