Surface related and intrinsic exciton recombination dynamics in ZnO nanoparticles synthesized by a sol-gel method
2013 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 102, no 1, 013109- p.Article in journal (Refereed) Published
ZnO nanoparticles with controlled sizes produced by a sol-gel method are studied by means of time-integrated as well as time-resolved photoluminescence (TRPL) spectroscopy. Room-temperature photoluminescence spectra show a blueshift of the excitonic emission with the decreasing particle size, which is attributed to the quantum confinement effect. The temperature dependence of the exciton lifetimes deduced from the TRPL results contains two components: the fast decay is attributed to surface trapping of exciton and the slow decay is mainly representative of the radiative processes involving the bound or free excitons.
Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 2013. Vol. 102, no 1, 013109- p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-88665DOI: 10.1063/1.4774002ISI: 000313646500103OAI: oai:DiVA.org:liu-88665DiVA: diva2:605492
Funding Agencies|National Science Council of Taiwan|NSC-100-2112-M-006-002-MY3|Headquarters of University Advancement at the National Cheng Kung University||Ministry of Education, Taiwan||2013-02-142013-02-142013-02-19