Details

Autor(en) / Beteiligte

• Kraus, Robert M
• Lagoudakis, Pavlos G
• Müller, Josef
• Rogach, Andrey L
• Lupton, John M
• Feldmann, Jochen
• Talapin, Dimitri V
• Weller, Horst

Titel

Interplay between Auger and Ionization Processes in Nanocrystal Quantum Dots

Ist Teil von

• The journal of physical chemistry. B, 2005-10, Vol.109 (39), p.18214-18217

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2005

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We study the interplay between Auger effects and ionization processes in the limit of strong electronic confinement in core/shell CdSe/ZnS semiconductor nanocrystal quantum dots. Spectrally resolved fluorescence decay measurements reveal a monotonic increase of the photoluminescence decay rate on excitation density. Our results suggest that Auger recombination accelerates ionization processes that lead to the occupation of dark, nonemissive nanocrystal states. A model is proposed in the quantized Auger regime describing these experimental observations and providing an estimate of the Auger assisted ionization rates.