An optical study of single pentacene molecules in n-tetradecane

Durand, Y.; Bloess, A.; Oijen, A.M. van; Köhler, J.; Groenen, E.J.J.; Schmidt, J. (2000)

Article / Letter to editor

We report the spectroscopic observation of single pentacene molecules in the matrices n-tetradecane and n-hexadecane, using a confocal microscope operating at liquid-helium temperatures. A maximum detected photon emission rate of only 30 counts per second (cps) is found for pentacene in n-hexadecane and 160 cps for pentacene in n-tetradecane. For the latter system, the low count rate is shown to be caused by a high S-1 --> T-1 intersystem crossing yield of about 40% in combination with a triplet lifetime of 33 +/- 3 mu s. Pentacene molecules in this polycrystalline host are found to show little spectral diffusion on a timescale of seconds. (C) 2000 Elsevier Science B.V. All rights reserved.

• All authors: Durand, Y.; Bloess, A.; Oijen, A.M. van; Köhler, J.; Groenen, E.J.J.; Schmidt, J.
• Date: 2000-02-04
• Journal: Chemical Physics Letters
• Volume: 317
• Issue: 3-5
• Pages: 232 - 237
• DOI: doi:10.1016/S0009-2614(99)01393-7
• Link: https://www.sciencedirect.com/science/article/pii/S0009261499013937?via%...