Identifying the origin of delayed electroluminescence in a polariton organic light-emitting diode
Identifying the origin of delayed electroluminescence in a polariton organic light-emitting diode
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DOI：
10.1515/nanoph-2023-0587
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发表时间：
2023-09
期刊：
影响因子：
7.5
通讯作者：
A. Abdelmagid;Hassan A. Qureshi;Michael A. Papachatzakis;Olli Siltanen;Manish Kumar;Ajith Ashokan;Seyhan Salman;K. Luoma;Konstantinos S. Daskalakis
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文献类型：
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作者：
A. Abdelmagid;Hassan A. Qureshi;Michael A. Papachatzakis;Olli Siltanen;Manish Kumar;Ajith Ashokan;Seyhan Salman;K. Luoma;Konstantinos S. Daskalakis
摘要改变现有分子发射体的能量分布是一个具有吸引力的挑战，在化学和有机光电研究中具有良好的成果。最近，通过将有机发光体置于光学腔中的强光-物质耦合研究对其进行了探索。尽管如此，一个争论围绕着观察到的材料特性的变化是否代表新的耦合系统动力学或光物质相互作用引起的预先存在的材料特性的揭露。在这里，第一次，我们研究了强耦合的极化激元有机发光二极管的时间分辨电致发光的研究。我们伴随着我们的实验分析与理论拟合使用的耦合速率方程模型占所有主要的机制，可以导致在有机发光体的延迟电致发光。我们发现，在我们的设备中的延迟电致发光是占主导地位的发射从捕获的电荷和这种机制保持不变的存在下，强耦合。
Abstract Modifying the energy landscape of existing molecular emitters is an attractive challenge with favourable outcomes in chemistry and organic optoelectronic research. It has recently been explored through strong light–matter coupling studies where the organic emitters were placed in an optical cavity. Nonetheless, a debate revolves around whether the observed change in the material properties represents novel coupled system dynamics or the unmasking of pre-existing material properties induced by light–matter interactions. Here, for the first time, we examined the effect of strong coupling in polariton organic light-emitting diodes via time-resolved electroluminescence studies. We accompanied our experimental analysis with theoretical fits using a model of coupled rate equations accounting for all major mechanisms that can result in delayed electroluminescence in organic emitters. We found that in our devices the delayed electroluminescence was dominated by emission from trapped charges and this mechanism remained unmodified in the presence of strong coupling.