Singlet energy transfer and singlet-singlet annihilation in light-emitting blends of organic semiconductors

Control of the dual emission from a thermally activated delayed fluorescence emitter containing phenothiazine units in organic light-emitting diodes

“…This implies that an efficient energy transfer takes place from the mCBP host to the (T-TRZ)-PTZ doping molecules. [43][44][45] It can also be seen that the steady-state PL spectrum of the blend lm exhibits a dual emission with two peaks located around 423 and 523 nm, respectively. Similarly to the solution case, the low and high energy peaks are attributed to the quasi-equatorial and quasi-axial conformers, respectively.…”

Exciton diffusion in organic semiconductors

“…The exciton diffusion coefficient can be estimated by measuring the efficiency of the exciton-exciton annihilation. 110,133,162,163,165,166,168,[201][202][203][204][205][206][207][208] The exciton diffusion coefficient is calculated from g, given eqn ( 13), which can be measured experimentally by modeling the PL decays measured at various excitation intensities of the incident light. Only one sample is needed for the measurements.…”

Solvent-free fluidic organic dye lasers

“…The maximum in the fluorescence spectrum of these dyes is observed at 533 and 609 nm respectively. It is well-known that Förster-type energy transfer depends on the overlap between the emission spectrum of the donor molecule and the absorption spectrum of the acceptor [23][24][25][26]. The overlaps observed between the optical spectra shown in Fig.…”