...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Materials >Saturation, Relaxation, And Dissociation Of Excited Triplet Excitons In Conjugated Polymers
【24h】

Saturation, Relaxation, And Dissociation Of Excited Triplet Excitons In Conjugated Polymers

机译：共轭聚合物中激发三重态激子的饱和，弛豫和离解

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Recombination of electrons and holes in organic semiconductors leads to the formation of strongly bound excitons. If the electrons and holes are initially uncorrelated, as in a light-emitting diode (LED), the excitons can be formed in either a singlet or a triplet state. In nonphosphorescent materials triplet excitons are only weakly coupled to the ground state and their formation therefore represents an important loss mechanism in LEDs. The fraction of excitons produced as singlets is still under debate and may vary from material to material, depending on the degree of exciton delocalization. Since the exchange energy (the difference in energy between singlet and triplet excitons) in organic semiconductors is large, triplet excitons may lie lower in energy than the charge-transfer state formed by electron transfer in photovoltaic devices based on donor-acceptor blends. Spin-mixing within charge pairs can therefore lead to formation of triplet excitons, thus providing a potentially important loss mechanism in organic photovoltaic devices.
机译：电子和空穴在有机半导体中的重组导致形成牢固结合的激子。如果电子和空穴最初不相关，例如在发光二极管（LED）中，则激子可以单重态或三重态形成。在非磷光材料中，三重态激子仅与基态弱耦合，因此它们的形成代表了LED中的重要损耗机理。作为单线态产生的激子的分数仍在争论中，并且可能因物质而异，具体取决于激子离域化的程度。由于有机半导体中的交换能量（单线态和三线态激子之间的能量差）很大，因此三线态激子的能量可能低于基于施主-受主共混物的光伏器件中电子转移形成的电荷转移状态。因此，电荷对内的自旋混合可导致三重态激子的形成，从而在有机光伏器件中提供了潜在的重要损耗机制。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号