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Synthesis and Characterization of Single White-emitting Polymers Based on Polymerized Thermally Activated Delayed Fluorescence Small Molecules
- Acta Polymerica Sinica Pages: 1-13(2024)
- 作者机构：
1.中国科学院长春应用化学研究所 高分子物理与化学国家重点实验室 长春 130022
2.中国科学技术大学应用化学与工程学院 合肥 230026
3.云南大学化学科学与工程学院 昆明 650091
- 作者简介：
Hong-kun Tian, E-mail:hktian@ciac.ac.cn
Jun-qiao Ding, E-mail: dingjunqiao@ynu.edu.cn
- 基金信息：
DOI：10.11777/j.issn1000-3304.2024.24061
CLC：-
Published Online：15 May 2024，
Received：29 February 2024，
Accepted：01 April 2024
扫 描 看 全 文
刘燊, 李雪, 赵磊, 王淑萌, 田洪坤, 丁军桥, 王利祥. 基于热活化延迟荧光小分子直接聚合的单一白光高分子的合成与表征. 高分子学报, doi: 10.11777/j.issn1000-3304.2024.24061
Liu, S.; Li, X.; Zhao, L.; Wang, S. M.; Tian, H. K.; Ding, J. Q.; Wang, L. X. Synthesis and characterization of single white-emitting polymers based on polymerized thermally activated delayed fluorescence small molecules. Acta Polymerica Sinica, doi: 10.11777/j.issn1000-3304.2024.24061
刘燊, 李雪, 赵磊, 王淑萌, 田洪坤, 丁军桥, 王利祥. 基于热活化延迟荧光小分子直接聚合的单一白光高分子的合成与表征. 高分子学报, doi: 10.11777/j.issn1000-3304.2024.24061 DOI：
Liu, S.; Li, X.; Zhao, L.; Wang, S. M.; Tian, H. K.; Ding, J. Q.; Wang, L. X. Synthesis and characterization of single white-emitting polymers based on polymerized thermally activated delayed fluorescence small molecules. Acta Polymerica Sinica, doi: 10.11777/j.issn1000-3304.2024.24061 DOI：
摘要
基于热活化延迟荧光小分子直接聚合的分子设计原则，采用吖啶-二苯甲酮-咔唑(AcBPCz)、吖啶-萘二甲酰亚胺-咔唑(AcNICz)和四甲基苯分别作为天蓝光TADF单元、橙光TADF单元和连接单元，设计合成了系列单一白光高分子P010~P075. 通过调控不同发色团之间的能量转移，所有单一白光高分子均表现出来自AcBPCz的天蓝光发射和来自AcNICz的橙光发射. 相应OLED器件获得了有效的白光发射，最大电流效率和外量子效率分别为5.4~16.8 cd·A
-1
和3.0%~6.4%. 同时，光色可以从P010的冷白光转变到P075的暖白光，色坐标CIE从(0.32
0.50)移动到(0.47
0.44)，色温CCT从5910 K降低到2797 K.
Abstract
Based on polymerized thermally activated delayed fluorescence (TADF) small molecules
a series of single white-emitting polymers named P010-P075 have been designed and synthesized by using acridine- benzophenone-carbazole (AcBPCz) as the sky-blue TADF moiety
acridine-naphthalimide-carbazole (AcNICz) as the orange TADF moiety and tetramethylbenzene as the linker between them. After a modulation of the AcNICz content in the range of 1%-7.5%
a part energy transfer can happen from AcBPCz to AcNICz. Consequently
P010-P075 all display a dual spectral profile in the photoluminescence (PL): the sky-blue emission p
eaked at 482-492 nm is from AcBPCz
while the orange emission peaked at 590-602 nm is from AcNICz. And the ratio of sky-blue to orange emission together is found to be decreased gradually with the increasing content of AcNICz. The corresponding solution-processed OLEDs achieve a bright white electroluminescence (EL)
revealing a maximum current efficiency of 5.4-16.8 cd·A
-1
and a maximum external quantum efficiency of 3.0%-6.4%. Noticeably
the EL is obviously dependent on the AcNICz content
consistent with the PL counterparts. Ongoing from P010 to P075
the Commission Internationale d'Eclairage (CIE) coordinates are shifted from (0.32
0.50) to (0.47
0.44) and the correlated color temperature (CCT) is reduced from 5910 K to 2797 K. The obtained cold white EL for P010 and warm white EL for P075 are believed to be applicable for different lighting scenes.
关键词
有机发光二极管热活化延迟荧光高分子单一白光高分子热活化延迟荧光小分子直接聚合光色
Keywords
OLEDThermally activated delayed fluorescence polymersSingle white-emitting polymersPolymerized thermally activated delayed fluorescence small moleculesEmissive color
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