Spin-dependent delayed luminescence from nongeminate pairs of polarons in-conjugated polymers
- 12 December 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 66 (24), 241201
- https://doi.org/10.1103/physrevb.66.241201
Abstract
We measured cw photoinduced absorption (PA) and spin- PA- and photoluminescence detected magnetic resonance (PADMR and PLDMR, respectively) in films of two representative -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.
Keywords
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