polymer发光二极管中两个三重态激子的散射和散射
Scattering and Recombination of Two Triplet Excitons in polymer light-emitting diodes
摘要：
基于包含链间相互作用的扩展的Su-Schrieffer-Heeger模型，采用非绝热演化方法研究了共轭聚合物中两个三重态激子之间的散射和复合过程.由于链间耦合，两个三重态激子中的电子和/或空穴可以交换。结果表明，复合诱导了单重态激子、激发极化子和双激子的形成。此外，我们还发现，这些产品的产量，这可能有助于发射，增加链间耦合强度，与实验结果吻合得很好。
英文摘要：
The scattering and recombination processes between two triplet excitons in conjugated polymers are investigated by using a nonadiabatic evolution method, based on an extended Su-Schrieffer-Heeger model including interchain interactions. Due to the interchain coupling, the electron and/or hole in the two triplet excitons can exchange. The results show that the recombination induces the formation of singlet excitons, excited polarons and biexcitons. Moreover, we also find the yields of these products, which can contribute to the emission, increase with the interchain coupling strength, in good agreement with results from experiments.
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