Types of Luminescence

Molecules can emit light for a variety of reasons. Depending on the source of the excitation energy, that luminescence can be described as fluorescence, phosphorescence, chemiluminescence, bioluminescence, or triboluminescence.

[natanabelian]

Amazing channel, took my interest of phys chem to another level!

[gowtham]

nice.much knowledge condensed in one video .. that keeps it engaging .

[sidewaysfcs]

Lanthanide compounds are usually phosphorescent because those are spin-forbidden transitions.

The lifetime of those excited states are ~ 10^-3 s.

Persistent luminescence ( minutes, hours) can actually be both fluorescence OR phosphorescence, the extremely long lifetimes are due to electron traps in point defects in lattices.

Phosphorescence is NOT defined by lifetime, but by spin change.

[NicholasLeeson]

What type of luminescence causes the aurora lights? Thanks

[alexandere]

What about electroluminescence? We use electricity to produce light

[abogeteddy]

Quite informative but You forgot about sonar luminescence .