why phosphorescence is called delayed fluorescence
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Phosphorescence is called delayed fluorescence because it is long-lived photoluminescence.
What is the difference between fluorescence and Phosphorescence?
- The major difference between fluorescence and phosphorescence is the difference in the timing of their photoluminescence activity.
- Fluorescence is a fast photoluminescence action that takes place in a very short time.
- On the contrary, photoluminescence continues to occur on its own even after the abrupt stop of the photoexcitation process.
- In fluorescence, singlet to triplet transition takes place whereas in phosphorescence singlet-to-singlet transition takes place.
- To put it more simply, phosphorescence emission is called a delayed process because it takes more time than the fluorescence process.
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