Título
Influence of 3D aggregation on the photoluminescence dynamics of CdSe quantum dot films
Autor(es)
Palabras clave
Quantum dots
Langmuir-blodgett films
Confocal fluorescence lifetime microscopy
Photoluminescence properties
Fecha de publicación
2017
Editor
Elsevier
Citación
Alejo, Pedro M.R. Paulo, M.D. Merchán, Emilio Garcia-Fernandez, Sílvia M.B. Costa, M.M. Velázquez, Influence of 3D aggregation on the photoluminescence dynamics of CdSe quantum dot films, Journal of Luminescence, Volume 183, 2017, Pages 113-120, ISSN 0022-2313, https://doi.org/10.1016/j.jlumin.2016.11.002. (https://www.sciencedirect.com/science/article/pii/S0022231316308833)
Resumen
[EN]Thin films ofsemiconductorCdSequantumdots,QDs,directlydepositedontoquartzaswellasontoa
Langmuir-Blodgett film oftheGeminisurfactantethyl-bis(dimethyloctadecylammoniumbromidehave
been preparedandtheirphotoluminescencepropertieswerecharacterizedbyconfocal fluorescence
lifetime microscopy.3DaggregatesofQDswereobservedinQD films directlydepositedontothesolid
while theGeminisurfactant film avoidsthe3Daggregation.Thephotoluminescencedecayanalysiswas
performed byaphenomenologicalmodelpreviouslyproposedbyuswhichconsidersthatthelumi-
nescence dynamicsisaffectedbyenergytransportandtrappingprocessesandtherelativecontribution
of theseprocessesdependson film morphology.Thus,inthenon-aggregatedandmorehomogeneousQD
films, QDsdepositedontothesurfactant,therelativecontributionoftheenergytransportprocessin-
creases withtrapconcentrationwhile3Daggregationfavorstheenergytransportevenatlowdensityof
energy traps.
URI
ISSN
0022-2313
DOI
10.1016/j.jlumin.2016.11.002
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