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5225169 
Journal Article 
Fluorescence studies of biphenyl doped by pyrene and perylene 
Pujari, SR; Jadhav, SA; Bhosale, PN; Rao, PMR; Patil, SR 
2002 
Yes 
Indian Journal of Pure and Applied Physics
ISSN: 0019-5596 
NATL INST SCIENCE COMMUNICATION 
NEW DELHI 
40 
2 
115-121 
English 
WOS:000174056000007 
Fluorescent biphenyl absorbing short wave UV radiation and emitting at long wave UV radiation has been used as a solid matrix and its luminophors have been prepared by adding intentionally fluorescent pyrene and perylene impurities. From the fluorescence spectra it is seen that the pyrene impurity shifts the UV fluorescence of biphenyl towards red. Pyrene doped biphenyl emits in blue region at a wavelength of maximum emission 458 nm due to formation of exciplex. Incorporation of perylene into bicomponent biphenyl-pyrene system gave tricomponent crystal systems emitting in green region of visible spectrum. The fluorescence spectra of tricomponent biphenyl are broad structureless bands with maximum emission at 501 nm. These emission bands are interpreted as arising due to exciplex formation between pyrene and perylene in biphenyl matrix.