Photophysical properties and laser performance of rubrene

Spin Statistics for TripletTriplet Annihilation Upconversion: Exchange Coupling, Intermolecular Orientation, and Reverse Intersystem Crossing

“…The concentrations were constrained to be non-negative. The spectra resulting from the MCR-ALS procedure agree well with reported singlet 3 and triplet 4 absorption spectra for rubrene in solution.…”

“…The triplet absorption cross section in the vicinity of 510 nm has been measured as 1.2 × 10 −16 cm 2 for rubrene in solution 3 . Using this value, and our film thickness of 125 nm, gives n T = 4.5 × 10 18 cm −3 for our maximum ∆T /T signal of −0.0067 and n T = 3.9 × 10 18 cm −3 for ∆T /T = −0.0058, the value just before the arrival of the push pulse (see Fig.…”

Photoinduced energy and electron transfer in rubrene–benzoquinone and rubrene–porphyrin systems

“…the range of 500-700 nm. On the other hand, upon excitation at 490 nm, Ru emits light in the spectral range of 516-688 nm with a quantum efficiency of 0.09 [48]. Thus, Ru emission overlaps with the Q bands of TAPP, potentially allowing for energy migration from Ru to TAPP.…”

Two-photon triplet-triplet annihilation upconversion for photovoltaics

“…This allows the ratio of sensitizer to emitter molecules to be maximised, which is required for efficient TTA. The emitter molecule was chosen to be rubrene, which has been well characterised for various uses such as a laser dye [7] or as a fluorescent dopant in OLED design [8]. The steady state absorption profile of rubrene does not overlap with that of ground state PQ4Pd as can be seen in the supporting information for [6], however the triplet state of PQ4Pd has a broad absorption range (around 510 -580 nm) so some absorption occurs at the same wavelength as the rubrene ground state.…”