Abstract
The lifetime of indirect excitons in AgBr quantum dots was studied at low temperature. Indirect-exciton luminescence shows a nonexponential decay. The unique nonexponential decay is well explained by a model that takes into account the discrete number of iodine impurities in a AgBr quantum dot. The obtained radiative lifetime of indirect excitons is 735±50 μs at 2 K and is independent of the radius of microscrystals. The result clearly shows that the L-Γ mixing effect for holes does not work when the radius is larger than 3.5 nm.
- Received 22 January 1992
DOI:https://doi.org/10.1103/PhysRevB.46.1827
©1992 American Physical Society
