We measured cw photoinduced absorption (PA) and spin-1/2 PA- and photoluminescence detected magnetic resonance (PADMR and PLDMR, respectively) in films of two representative π-conjugated polymers; poly(phenylene-vinylene) and polythiophene. From the dependences of the polaron PA and PLDMR on the laser excitation intensity we conclude that the PLDMR is due to spin-dependent delayed luminescence from nongeminate pairs of polarons. Our findings imply that spin-dependent exciton formation in polymer light-emitting diodes leads to enhanced emission efficiency.
No takes yet. Share an insight, caveat, or question.
Wohlgenannt et al. (2002) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: