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Type: 
Journal
Description: 
PbS nanocrystals (diameter of 5–7nm) were synthesized via sulfur ion implantation in Pb-based glasses and postannealing. They display strong emission at around 1.5μm due to quantum confinement, and a very large photoluminescence (PL) excitation cross section. The PL intensity and decay rate temperature dependences provide evidence for a large energy splitting (ca. 30meV) of the emitting exciton ground state fine structure, presumably due to the complex PbS electronic band structure.
Publisher: 
AIP
Publication date: 
1 May 2006
Authors: 

R Espiau de Lama√ęstre, H Bernas, D Pacifici, G Franzo, F Priolo

Biblio References: 
Volume: 88 Issue: 18 Pages: 181115
Origin: 
Applied physics letters