Abstract
An analytical model describing the low-temperature tunneling dynamics of excitons in disordered systems is proposed, reproducing the time-resolved photoluminescence (TRPL) line shape and the temporal red-shift of the TRPL maximum of localized excitons in detail. Assuming a Gaussian energy distribution of the localized states, the observed asymmetric spectral line shape can be interpreted as the distribution of the lowest states within a certain tunneling volume. Using (Mg,Zn)O and Cd(S,Se) as model systems, the number of reachable states is determined from the time dependence of the photoluminescence signal and the density of localized states is estimated. For (Mg,Zn)O, we also reveal the exciton capture at donors and its influence on the TRPL transients.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
