Exciton interactions in crystalline tetracene studied by single picosecond pulse excitation

✍ Scribed by A.J. Campillo; R.C. Hyer; S.L. Shapiro; C.E. Swenberg

• Book ID: 103015623
• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 706 KB
• Volume: 48
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(77)85079-3

✦ Synopsis

Kccc~ved 22 hfarch 1977 Thhe cfficicncy of fluorescence In cry5talhe tctrdccnc wa; studmi as a function of excitation intensity v4ith sin@ FlcOsecond laser pulses. Thcorctiul fits to the cxpcnmcntal fluorcscellre-qucnchln~ curves, at room tempcrsturc and at I70 K, for both a and h-incident polarnations, g~vc a smglct-singlet anmlnlat~on rate of 7ss = LO-' cm3 s-', to wrthin s fuctur elf two. Thic rate constant was confirmed by dlrcctly measuring the dcpcndencc of hst radlativc lifetinles On cwitation intcns-Ity. WC also infer a value for the smglct dlffuslon rate, Ds, of 4 X lo-* cm* S-I to wlthin a factor of two.