Macrocrystals of colloidal quantum dots in anthrancene: exciton trannsfer and polarized emission
Hernandez Martinez, P. L.
Akgül, M. Z.
Demir, H. V.
Journal of Physical Chemistry Letters
American Chemical Society
1767 - 1772
MetadataShow full item record
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/12861
In this work, centimeter-scale macrocrystals of nonpolar colloidal quantum dots (QDs) incorporated into anthracene were grown for the first time. The exciton transfer from the anthracene host to acceptor QDs was systematically investigated, and anisotropic emission from the isotropic QDs in the anthracene macrocrystals was discovered. Results showed a decreasing photoluminescence lifetime of the donor anthracene, indicating a strengthening energy transfer with increasing QD concentration in the macrocrystals. With the anisotropy study, QDs inside the anthracene host acquired a polarization ratio of similar to 1.5 at 0 degrees collection angle, and this increases to similar to 2.5 at the collection angle of 60 degrees. A proof-of-concept application of these excitonic macrocrystals as tunable color converters on light-emitting diodes was also demonstrated.