Spatial mapping of exciton lifetimes in single ZnO nanowires
Source abstract
Abstract
We investigate the spatial dependence of the exciton lifetimes in single ZnO nanowires. We have found that the free exciton and bound exciton lifetimes exhibit a maximum at the center of nanowires, while they decrease by 30% towards the tips. This dependence is explained by considering the cavity-like properties of the nanowires in combination with the Purcell effect. We show that the lifetime of the bound-excitons scales with the localization energy to the power of 3/2, which validates the model of Rashba and Gurgenishvili at the nanoscale.
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Research context
OpenAlex topics: ZnO doping and properties · Nanowire Synthesis and Applications · Electronic and Structural Properties of Oxides
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Affiliations
Technische Universität Berlin 1 Institut für Festkörperphysik, , Hardenbergstr. 36, 10623 Berlin, Germany
ICN2 - Institut Catala de Nanociencia i Nanotecnologia 2 , Campus UAB, 08193 Bellaterra (Barcelona), Spain
Universitat de Barcelona 3 Departament d’Electrònica, M-2E, IN2UB, , C/Martí i Franquès 1, 08028 Barcelona, Spain
Institut de Recerca en Energia de Catalunya (IREC) 4 , Jardins de les Dones de Negre 1, Sant Adrià de Besòs 08930, Spain
ICREA 5 , Passeig Lluís Companys 23, 08010 Barcelona, Spain
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