title: Ultrafast formation of nonemissive species via intermolecular interaction in single crystals of conjugated molecules.
abstract: 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.
authors.affiliation: Dipartimento di Fisica, Università di Cagliari, and Istituto Nazionale per la Fisica della Materia, I-09042 Monserrato, Italy.
authors.forename: M A
authors.initials: MA
authors.lastname: Loi
authors.forename: A
authors.initials: A
authors.lastname: Mura
authors.forename: G
authors.initials: G
authors.lastname: Bongiovanni
authors.forename: Q
authors.initials: Q
authors.lastname: Cai
authors.forename: C
authors.initials: C
authors.lastname: Martin
authors.forename: H R
authors.initials: HR
authors.lastname: Chandrasekhar
authors.forename: M
authors.initials: M
authors.lastname: Chandrasekhar
authors.forename: W
authors.initials: W
authors.lastname: Graupner
authors.forename: F
authors.initials: F
authors.lastname: Garnier