%0 Journal Article %1 doi:10.1021/jacs.7b04619 %A Steiner, Florian %A Lupton, John M. %A Vogelsang, Jan %D 0 %J Journal of the American Chemical Society %K P3HT multichain singlechain triplet %N 0 %P null %R 10.1021/jacs.7b04619 %T Role of Triplet-State Shelving in Organic Photovoltaics: Single-Chain Aggregates of Poly(3-hexylthiophene) versus Mesoscopic Multichain Aggregates %U http://dx.doi.org/10.1021/jacs.7b04619 %V 0 %X Triplet excitons have been the focus of considerable attention with regards to the functioning of polymer solar cells because these species are long-lived and quench subsequently generated singlet excitons in their vicinity. The role of triplets in poly(3-hexylthiophene) (P3HT) has been investigated extensively with contrary conclusions regarding their importance. We probe the various roles triplets can play in P3HT by analyzing the photoluminescence (PL) from isolated single-chain aggregates and multichain mesoscopic aggregates. Solvent vapor annealing allows deterministic growth of P3HT aggregates consisting of ∼20 chains, which exhibit red-shifted and broadened PL compared to single-chain aggregates. The multichain aggregates exhibit a decrease of photon antibunching contrast compared to single-chain aggregates, implying rather weak interchain excitonic coupling and energy transfer. Nevertheless, the influence of triplet-quenching oxygen on PL and a photon correlation analysis of aggregate PL reveal that triplets are quenched by intermolecular interactions in the bulk state.

@article{doi:10.1021/jacs.7b04619, abstract = { Triplet excitons have been the focus of considerable attention with regards to the functioning of polymer solar cells because these species are long-lived and quench subsequently generated singlet excitons in their vicinity. The role of triplets in poly(3-hexylthiophene) (P3HT) has been investigated extensively with contrary conclusions regarding their importance. We probe the various roles triplets can play in P3HT by analyzing the photoluminescence (PL) from isolated single-chain aggregates and multichain mesoscopic aggregates. Solvent vapor annealing allows deterministic growth of P3HT aggregates consisting of ∼20 chains, which exhibit red-shifted and broadened PL compared to single-chain aggregates. The multichain aggregates exhibit a decrease of photon antibunching contrast compared to single-chain aggregates, implying rather weak interchain excitonic coupling and energy transfer. Nevertheless, the influence of triplet-quenching oxygen on PL and a photon correlation analysis of aggregate PL reveal that triplets are quenched by intermolecular interactions in the bulk state. }, added-at = {2017-07-17T10:54:52.000+0200}, author = {Steiner, Florian and Lupton, John M. and Vogelsang, Jan}, biburl = {https://www.bibsonomy.org/bibtex/2d309dcbec0aaf23a7040712263c11525/fabianopkm}, doi = {10.1021/jacs.7b04619}, eprint = {http://dx.doi.org/10.1021/jacs.7b04619}, interhash = {a5dabd493eab5faff372a93de02eebc9}, intrahash = {d309dcbec0aaf23a7040712263c11525}, journal = {Journal of the American Chemical Society}, keywords = {P3HT multichain singlechain triplet}, note = {PMID: 28708387}, number = 0, pages = {null}, timestamp = {2017-07-17T10:54:52.000+0200}, title = {Role of Triplet-State Shelving in Organic Photovoltaics: Single-Chain Aggregates of Poly(3-hexylthiophene) versus Mesoscopic Multichain Aggregates}, url = {http://dx.doi.org/10.1021/jacs.7b04619}, volume = 0, year = 0 }