INVESTIGADORES
STEFANI Fernando Daniel
artículos
Título:
Memory in quantum-dot photoluminescence blinking
Autor/es:
FERNANDO D STEFANI; XINHUA ZHONG; WOLFGANG KNOLL; MINGYONG HAN; MAXIMILIAN KREITER
Revista:
NEW JOURNAL OF PHYSICS
Editorial:
IOP PUBLISHING LTD
Referencias:
Año: 2005 vol. 7 p. 19101 - 19117
ISSN:
1367-2630
Resumen:
We demonstrate that subsequent on- and off-times of the luminescence blinking of semiconductor quantum dots (QDs) are correlated, indicating that the process behind is not memoryless.A residual memory, which has been overlooked in previous investigations of the blinking, is found to last for several (∼40) detected on/off cycles. No influence of the substrate nature or the excitation intensity is observed, pointing to a process intrinsic to the QDs. These results should encourage re-analysis of existing data and may represent the key to understand the underlying physical mechanism of QD luminescence blinking.
