photoluminescence quantum yield
quotient of the photon flux of the radiation emitted by a photoluminescent material and the photon flux of the exciting radiation absorbed by that material
Note 1 to entry: See also "external photoluminescence quantum yield".
Note 2 to entry: The photoluminescence quantum yield has unit one.
Note 3 to entry: This entry was numbered 845-04-32 in IEC 60050-845:1987.
Note 4 to entry: This entry was numbered 17-906 in CIE S 017:2011.