3
2
1
0
S1
3
2
1
0
S0
Higher energy and
vibration states
vibration states
Lowest singlet
excited state
excited state
Ground state
energy levels
energy levels
Excitation
(10-15s)
(10-15s)
Relaxation
(10-12s)
(10-12s)
Fluorescence
(10-9s)
(10-9s)
Solvent
Relaxation
(10-12s)
Relaxation
(10-12s)
"Forbidden" transition
(Triplet State)
(Triplet State)
Start
Tutorial Speed
Fluorescence Type