Preferred Label : delayed fluorescence;
IUPAC definition : Three types of delayed fluorescence are known: ol class section li E-type delayed
fluorescence: The process in which the first excited singlet state becomes populated
by a thermally activated radiationless transition from the first excited triplet state.
Since in this case the populations of the singlet and triplet states are in thermal
equilibrium, the lifetimes of delayed fluorescence and the concomitant phosphorescence
are equal. /li li P-type delayed fluorescence: The process in which the first
excited singlet state is populated by interaction of two molecules in the triplet
state (triplet-triplet annihilation ) thus producing one molecule in the excited singlet
state. In this biphotonic process the lifetime of delayed fluorescence is half the
value of the concomitant phosphorescence. /li li Recombination fluorescence: The
first excited singlet state becomes populated by recombination of radical ions with
electrons or by recombination of radical ions of opposite charge. /li /ol ;
Origin ID : D01579;
See also
Three types of delayed fluorescence are known: ol class section li E-type delayed
fluorescence: The process in which the first excited singlet state becomes populated
by a thermally activated radiationless transition from the first excited triplet state.
Since in this case the populations of the singlet and triplet states are in thermal
equilibrium, the lifetimes of delayed fluorescence and the concomitant phosphorescence
are equal. /li li P-type delayed fluorescence: The process in which the first
excited singlet state is populated by interaction of two molecules in the triplet
state (triplet-triplet annihilation ) thus producing one molecule in the excited singlet
state. In this biphotonic process the lifetime of delayed fluorescence is half the
value of the concomitant phosphorescence. /li li Recombination fluorescence: The
first excited singlet state becomes populated by recombination of radical ions with
electrons or by recombination of radical ions of opposite charge. /li /ol
