The Dynamics of Charged and Neutral Excitons in an InGaN Quantum Dot on a GaN Pyramid
(English)Manuscript (preprint) (Other academic)
The neutral (X0) and negatively charged excitons (X-) in an InGaN QD on a GaN pyramid is studied by the timeintegrated micro-photoluminescence (μPL) and time-resolved micro-photoluminescence (TRμPL) microcopies. Both X0 and X- exhibit mono-exponential decay curves with fitted lifetimes of 310 and 140 ps, respectively. Neither energy shifts nor changes in the life times X0 and X- with increasing excitation power were observed, indicating the QD is small and free from the quantum confine Stark effect. The TRμPL is not only a powerful technique for studying the dynamics of exciton in QDXs, but also for the identification of exciton complexes in QDs.
IdentifiersURN: urn:nbn:se:liu:diva-97416OAI: oai:DiVA.org:liu-97416DiVA: diva2:647673