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Intrinsically Flexible and Aging Resistant Fluorene-Based Rod-Coil Copolymer for Bendable Deep-Blue PLEDs
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-05-25 , DOI: 10.1002/adfm.202303947 Hao Li 1 , Mengna Yu 1 , Jiabin Gu 1 , Qiujing Bao 1 , Yangcheng Wang 2 , Yang Li 1 , Yan Ma 3 , Lubing Bai 4 , Zhiqiang Zhuo 4 , Yunlong Zhang 1 , Jingrui Zhang 1 , Yeyang Wang 2 , Manman Luo 1 , Yiren Liu 1 , Chenghui Li 3 , Jinyi Lin 4 , Xinwen Zhang 2 , Quanyou Feng 1 , Linghai Xie 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-05-25 , DOI: 10.1002/adfm.202303947 Hao Li 1 , Mengna Yu 1 , Jiabin Gu 1 , Qiujing Bao 1 , Yangcheng Wang 2 , Yang Li 1 , Yan Ma 3 , Lubing Bai 4 , Zhiqiang Zhuo 4 , Yunlong Zhang 1 , Jingrui Zhang 1 , Yeyang Wang 2 , Manman Luo 1 , Yiren Liu 1 , Chenghui Li 3 , Jinyi Lin 4 , Xinwen Zhang 2 , Quanyou Feng 1 , Linghai Xie 1
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In the field of flexible light-emitting display, goal-oriented intelligent molecular design is used to control various behaviors of molecules, which provides potential for the development of flexible light-emitting conjugated polymers (LCPs). The introduction of non-conjugated units into polymer molecules is a key prerequisite for realizing the intrinsic flexibility, but its easy interchain slip will also lead to the formation of interchain excited states, which is detrimental to the efficiency of light-emitting diodes. Herein, two kinds of fluorene-based rod-coil copolymer with stable deep blue emission characteristics is presented and with Commission Internationale de L'Eclairage (CIE) coordinates of (0.18, 0.14) and (0.15, 0.09), respectively. Surprisingly, the copolymer films show efficient blue emission even at 100% tension. Meanwhile, the rod-coil copolymer possesses better aging resistance compared to rigid π-conjugated counterparts. Finally, both rigid and flexible light-emitting diodes based on rod-coil copolymer exhibit stable deep blue emission, and the G2-based PLED with CIE coordinates of (0.16, 0.08), which approach National Television System Committee standard blue specification. These results confirm the validity of rod-coil copolymer design strategy in constructing inherently flexible polymers with deep blue emission, which have great application potential in flexible PLEDs.
中文翻译：
用于可弯曲深蓝色 PLED 的本质柔性和耐老化芴基棒状线圈共聚物
在柔性发光显示领域，利用目标导向的智能分子设计来控制分子的各种行为，这为柔性发光共轭聚合物（LCP）的发展提供了潜力。在聚合物分子中引入非共轭单元是实现固有柔性的关键前提，但其容易的链间滑移也会导致链间激发态的形成，这不利于发光二极管的效率。在此，提出了两种具有稳定的深蓝色发射特性的芴基棒线圈共聚物，其国际照明委员会（CIE）坐标分别为（0.18，0.14）和（0.15，0.09）。令人惊讶的是，即使在 100% 张力下，共聚物薄膜也显示出高效的蓝光发射。同时，π-共轭对应物。最后，基于棒-线圈共聚物的刚性和柔性发光二极管均表现出稳定的深蓝色发射，并且基于G2的PLED的CIE坐标为(0.16，0.08)，接近国家电视系统委员会标准蓝色规格。这些结果证实了棒-线圈共聚物设计策略在构建具有深蓝色发射的固有柔性聚合物方面的有效性，该聚合物在柔性PLED中具有巨大的应用潜力。
更新日期：2023-05-25
中文翻译：
用于可弯曲深蓝色 PLED 的本质柔性和耐老化芴基棒状线圈共聚物
在柔性发光显示领域，利用目标导向的智能分子设计来控制分子的各种行为，这为柔性发光共轭聚合物（LCP）的发展提供了潜力。在聚合物分子中引入非共轭单元是实现固有柔性的关键前提，但其容易的链间滑移也会导致链间激发态的形成，这不利于发光二极管的效率。在此，提出了两种具有稳定的深蓝色发射特性的芴基棒线圈共聚物，其国际照明委员会（CIE）坐标分别为（0.18，0.14）和（0.15，0.09）。令人惊讶的是，即使在 100% 张力下，共聚物薄膜也显示出高效的蓝光发射。同时，π-共轭对应物。最后，基于棒-线圈共聚物的刚性和柔性发光二极管均表现出稳定的深蓝色发射，并且基于G2的PLED的CIE坐标为(0.16，0.08)，接近国家电视系统委员会标准蓝色规格。这些结果证实了棒-线圈共聚物设计策略在构建具有深蓝色发射的固有柔性聚合物方面的有效性，该聚合物在柔性PLED中具有巨大的应用潜力。
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