Thomas J. Penfold

TL;DR: The vibronic coupling rISC model is used to predict this behaviour and describes how rISC and TADF are affected by external perturbation, substantiating the model of rISC.

TL;DR: The theory and fundamental principles of the spin-vibronic mechanism for ISC are presented, followed by empirical rules to estimate the rate of ISC within this regime.

TL;DR: A model spin‐vibronic Hamiltonian is used to reveal the crucial role of non‐Born‐Oppenheimer effects in determining k rISC and demonstrates that vibronic (nonadiabatic) coupling between the lowest local excitation triplet and lowest charge transfer triplet opens the possibility for significant second‐order coupling effects and increasesk rISC by about four orders of magnitude.

TL;DR: Thermally activated delayed fluorescence has recently emerged as one of the most attractive methods for harvesting triplet states in metal-free organic materials for application in organic light emitting diodes (OLEDs).

TL;DR: Two regioisomers of bis(10H-phenothiazin-10-yl)dibenzo[b,d]thiophene-S,S-dioxide, a donor–acceptor–donor thermally-activated delayed fluorescence (TADF) emitter, are studied and it is found that donors or acceptors with more than one conformer have negative repercussions for TADF in organic light-emitting diodes.