Preparation and photophysics of strongly luminescing Cd3P2 quantum dots

2019-10-10 11:16:41

The temperature quantum Decay EV

责任者: Kornowski, A.;Eichberger, R.;Giersig, M.;Weller, H.;Eychmuller, A. 单位: Dept. of Phys. Chem., Hamburg Univ., Germany 来源出处: Journal of Physical Chemistry(J. Phys. Chem. (USA)),1996/07/25,100(30):12467-71 摘要: The wet chemical preparation, the electron microscopic characterization, and the temperature-dependent absorption as well as both the static and time-resolved fluorescence properties of Cd3P2 quantum dots are presented. The particles are strongly size quantized as seen from the 1.5 eV blue shift of the first electronic transition compared to the bulk bandgap of 0.5 eV. The particles emit close to the onset of absorption, exhibiting a quantum yield of 0.25 at room temperature. The luminescence decay has a multiexponential appearance at room temperature which transforms into two clearly distinguishable decay channels at low temperatures 关键词: electron microscopy;fluorescence;materials preparation;nanostructured materials;semiconductor quantum dots;spectral line shift;time resolved spectra;visible spectra;strongly luminescing Cd3P2 quantum dots;wet chemical preparation;electron microscopic characterization;temperature-dependent absorption;static and time-resolved fluorescence properties;time-resolved fluorescence properties;blue shift;first electronic transition;bulk bandgap;quantum yield;room temperature;luminescence decay;decay channels;photophysics;semiconductor;visible spectra;1.5 eV;0.5 eV;Cd3P2