Ultrafast formation of nonemissive species via intermolecular interaction in single crystals of conjugated molecules.
We investigate the influence of interchain interactions on the photoluminescence processes in a sexithiophene single crystal by applying hydrostatic pressure. We perform transient photoluminescence spectroscopy in the time domain of 100 fs for pressures up to 60 kbar. The combined use of steady-state and time-resolved optical spectroscopies allows us to show that the pressure-induced quenching of the photoluminescence is caused by an ultrafast (approximately 100 fs) formation of intermolecular species.
Loi
M A
MA
Dipartimento di Fisica, Università di Cagliari, and Istituto Nazionale per la Fisica della Materia, I-09042 Monserrato, Italy.
Mura
A
A
Bongiovanni
G
G
Cai
Q
Q
Martin
C
C
Chandrasekhar
H R
HR
Chandrasekhar
M
M
Graupner
W
W
Garnier
F
F