Effect of surface stoichiometry on blinking and hole trapping dynamics in CdSe nanocrystals
We measure the photoinduced carrier dynamics as the surface composition of CdSe
nanocrystals is systematically varied from metal rich (∼ 80% surface Cd) to nearly
stoichiometric (∼ 50% surface Cd). Using time-resolved optical spectroscopy, we determine
that the luminescence lifetime is controlled by the rate of hole trapping at the newly exposed
surface selenium atoms. However, the increased rate of the photoluminescence decay is not
sufficient to explain the decreased photoluminescence quantum yield, and requires a …
nanocrystals is systematically varied from metal rich (∼ 80% surface Cd) to nearly
stoichiometric (∼ 50% surface Cd). Using time-resolved optical spectroscopy, we determine
that the luminescence lifetime is controlled by the rate of hole trapping at the newly exposed
surface selenium atoms. However, the increased rate of the photoluminescence decay is not
sufficient to explain the decreased photoluminescence quantum yield, and requires a …
[引用][C] Effect of Surface Stoichiometry on Blinking and Hole Trapping Dynamics in CdSe Nanocrystals
B Erik - 2015
以上显示的是最相近的搜索结果。 查看全部搜索结果