Dynamic recombination of triplet exciton with trapped counterion in conjugated polymers Yadong Wang, Jianjun Liu, Yanxia Liu, Xiru Wang and Yan Meng Eur. Phys. J. B, 93 9 (2020) 173 Published online: 07 September 2020 DOI: 10.1140/epjb/e2020-10310-4