The temperature dependent radiative lifetime of electron-hole excitations in colloidal CdSe nanocrystal quantum dots was investigated. The studies reveal an intrinsic, radiative upper limit of approximately 1 micro sec. for the storage of excitons below 2K. At higher temperatures, the exciton lifetimes were consistent with thermal activation from the dark exciton ground state.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)