TY - JOUR
T1 - Simple surface-trap-filling model for photoluminescence blinking spanning entire CdSe quantum wires
AU - Glennon, John J.
AU - Buhro, William E.
AU - Loomis, Richard A.
PY - 2008/4/3
Y1 - 2008/4/3
N2 - The mechanism for synchronous photoluminescence intensity fluctuations, blinking, spanning entire micrometer-long CdSe quantum wires (Glennon, J. J.; Tang, R.; Buhro, W. E.; Loomis, R. A. Nano Lett. 2007, 7, 3290) is likely different than that commonly cited for semiconductor quantum dots. We present a simple model for the intensity blinking in quantum wires that is based on the dynamic, transient filling of surface-trap sites by photogenerated excitons and the emptying of these occupied trap sites. The model implements a kinetic Monte Carlo scheme and a dynamic photoluminescence quantum yield that depends on the fraction of trap sites filled. When a majority of the surface traps are filled, one-dimensional excitons are formed and a high emission efficiency is realized. Autocorrelation analysis of both experiment and simulation reveal the nonergodic kinetics governing the blinking phenomenon.
AB - The mechanism for synchronous photoluminescence intensity fluctuations, blinking, spanning entire micrometer-long CdSe quantum wires (Glennon, J. J.; Tang, R.; Buhro, W. E.; Loomis, R. A. Nano Lett. 2007, 7, 3290) is likely different than that commonly cited for semiconductor quantum dots. We present a simple model for the intensity blinking in quantum wires that is based on the dynamic, transient filling of surface-trap sites by photogenerated excitons and the emptying of these occupied trap sites. The model implements a kinetic Monte Carlo scheme and a dynamic photoluminescence quantum yield that depends on the fraction of trap sites filled. When a majority of the surface traps are filled, one-dimensional excitons are formed and a high emission efficiency is realized. Autocorrelation analysis of both experiment and simulation reveal the nonergodic kinetics governing the blinking phenomenon.
UR - https://www.scopus.com/pages/publications/47149101094
U2 - 10.1021/jp710067b
DO - 10.1021/jp710067b
M3 - Article
AN - SCOPUS:47149101094
SN - 1932-7447
VL - 112
SP - 4813
EP - 4817
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 13
ER -