title: Excited-state dynamics in an α-perylene single crystal: two-photon- and consecutive two-quantum-induced singlet fission.
abstract: Excited-state dynamics in α-perylene single crystals is studied by time-resolved fluorescence and transient absorption techniques under different excitation conditions. The ultrafast lifetimes of the "hot" excimer (Y) state were resolved. Three competing excited-states decay channels are observed: excimer formation, dimer cation generation, and singlet fission. The singlet fission induced by two-photon and consecutive two-quantum absorption is reported for the first time in an α-perylene crystal.
authors.affiliation: Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371, Singapore.
authors.forename: Lin
authors.initials: L
authors.lastname: Ma
authors.forename: Ke Jie
authors.initials: KJ
authors.lastname: Tan
authors.forename: Hui
authors.initials: H
authors.lastname: Jiang
authors.forename: Christian
authors.initials: C
authors.lastname: Kloc
authors.forename: Maria-Elisabeth
authors.initials: ME
authors.lastname: Michel-Beyerle
authors.forename: Gagik G
authors.initials: GG
authors.lastname: Gurzadyan