PREPARATION AND PHOTOPHYSICS OF STRONGLY LUMINESCING CD3P2 QUANTUM DOTS

Citation
A. Kornowski et al., PREPARATION AND PHOTOPHYSICS OF STRONGLY LUMINESCING CD3P2 QUANTUM DOTS, Journal of physical chemistry, 100(30), 1996, pp. 12467-12471
Citations number
31
Categorie Soggetti
Chemistry Physical
ISSN journal
00223654
Volume
100
Issue
30
Year of publication
1996
Pages
12467 - 12471
Database
ISI
SICI code
0022-3654(1996)100:30<12467:PAPOSL>2.0.ZU;2-8
Abstract
The wet chemical preparation, the electron microscopic characterizatio n, and the temperature-dependent absorption as well as both the static and time-resolved fluorescence properties of Cd3P2 quantum dots are p resented. The particles are strongly size quantized as seen from the 1 .5 eV blue shift of the first electronic transition compared to the bu lk bandgap of 0.5 eV. The particles emit close to the onset of absorpt ion, exhibiting a quantum yield of 0.25 at room temperature. The lumin escence decay has a multiexponential appearance at room temperature wh ich transforms into two clearly distinguishable decay channels at low temperatures.