三重态架效应在有机光致变色中的作用：聚（3-己基噻吩）单链聚集体与介观多链聚集体
Role of Triplet-State Shelving in Organic Photovoltaics: Single-Chain Aggregates of Poly(3-hexylthiophene) versus Mesoscopic Multichain Aggregates
摘要：
关于聚合物太阳能电池的功能，三重态激子一直是相当关注的焦点，因为这些物质是长寿命的，并且淬灭随后在其附近产生的单重态激子。三重态在聚（3-己基噻吩）（P3 HT）中的作用已被广泛研究，关于其重要性的结论相反。我们通过分析孤立的单链聚集体和多链介观聚集体的光致发光（PL），探讨了三重态在P3 HT中的各种作用。溶剂蒸气退火允许由~20条链组成的P3 HT聚集体的确定性生长，与单链聚集体相比，其表现出红移和加宽的PL。与单链聚集体相比，多链聚集体的光子反聚束对比度降低，这意味着链间激子耦合和能量转移较弱。然而，三重态猝灭氧对PL的影响和聚合PL的光子相关分析表明，三重态猝灭的分子间相互作用在体状态。
英文摘要：
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 multi-chain 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 multi-chain 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.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
