Temperature-dependent absolute fluorescence quantum yield of C60 multilayers

✍ Scribed by D.R. Haynes; A. Tokmakoff; S.M. George

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 633 KB
• Volume: 214
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(93)85454-v

✦ Synopsis

Laser-induced fluorescence techniques were used to examine the fluorescence quantum yield of Cso multilayers on AlsO3 (0001) from 28 tc 350 XC in ultra-high vacuum The Cm fluorescence quantum yield was q= 6.2X lo-' + 1.3~ lo-' at 28 IL This absolute value was determined by comparison with the known Buoresccnce quantum yield of 9,1 O-diphenylanthracene. The Cd0 fluorescence quantum yield decreased progressively with increasing temperature from 28 to 350 K. The temperature-dependent changes in the quantum yield were reversible. No fluorescence was detected at surface temperatures greater than 350 K. The temperature dependence was attributed to either enhanced internal conversion or increased intersystem crossing.