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Ambient Room Temperature Phosphorescence and Thermally Activated Delayed Fluorescence from a Core-Substituted Pyromellitic Diimide Derivative
The Journal of Physical Chemistry B ( IF 2.8 ) Pub Date : 2021-04-22 , DOI: 10.1021/acs.jpcb.1c02253 Suman Kuila 1 , Swadhin Garain 1 , Gangadhar Banappanavar 2 , Bidhan Chandra Garain 3 , Dinesh Kabra 2 , Swapan K. Pati 3 , Subi J. George 1
The Journal of Physical Chemistry B ( IF 2.8 ) Pub Date : 2021-04-22 , DOI: 10.1021/acs.jpcb.1c02253 Suman Kuila 1 , Swadhin Garain 1 , Gangadhar Banappanavar 2 , Bidhan Chandra Garain 3 , Dinesh Kabra 2 , Swapan K. Pati 3 , Subi J. George 1
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Triplet harvesting under ambient conditions plays a crucial role in improving the luminescence efficiency of purely organic molecular systems. This requires elegant molecular designs that can harvest triplets either via room temperature phosphorescence (RTP) or by thermally activated delayed fluorescence (TADF). In this context, here we report a donor core-substituted pyromellitic diimide (acceptor) derivative as an efficient charge-transfer molecular design from the arylene diimide family as a triplet emitter. Solution-processed thin films of carbazole-substituted CzPhPmDI display both RTP- and TADF-mediated twin emission with a long lifetime and high efficiency under ambient conditions. The present study not only sheds light on the fundamental photophysical process involved in the triplet harvesting of donor–acceptor organic systems, but also opens new avenues in exploring an arylene diimide class of molecules as potential organic light-emitting materials.
中文翻译：
核心取代的均苯四甲酸二酰亚胺衍生物的室温室温磷光和热活化延迟荧光
在环境条件下收集三重态在提高纯有机分子系统的发光效率中起着至关重要的作用。这需要优雅的分子设计，既可以通过室温磷光（RTP）或通过热活化延迟荧光（TADF）来收获三胞胎。在这种情况下，我们在此报告了一个供体核取代的均苯四甲酸二酰亚胺（受体）衍生物，作为来自亚芳基二酰亚胺家族的三重发射极，是一种有效的电荷转移分子设计。咔唑取代的CzPhPmDI的溶液处理薄膜在环境条件下，显示出RTP和TADF介导的双发射，寿命长且效率高。本研究不仅阐明了供体-受体有机体系三重态收获所涉及的基本光物理过程，而且为探索亚芳基二酰亚胺类分子作为潜在的有机发光材料开辟了新途径。
更新日期：2021-05-06
中文翻译：
核心取代的均苯四甲酸二酰亚胺衍生物的室温室温磷光和热活化延迟荧光
在环境条件下收集三重态在提高纯有机分子系统的发光效率中起着至关重要的作用。这需要优雅的分子设计，既可以通过室温磷光（RTP）或通过热活化延迟荧光（TADF）来收获三胞胎。在这种情况下，我们在此报告了一个供体核取代的均苯四甲酸二酰亚胺（受体）衍生物，作为来自亚芳基二酰亚胺家族的三重发射极，是一种有效的电荷转移分子设计。咔唑取代的CzPhPmDI的溶液处理薄膜在环境条件下，显示出RTP和TADF介导的双发射，寿命长且效率高。本研究不仅阐明了供体-受体有机体系三重态收获所涉及的基本光物理过程，而且为探索亚芳基二酰亚胺类分子作为潜在的有机发光材料开辟了新途径。
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