Meta Junction Promoting Efficient Thermally Activated Delayed Fluorescence in Donor‐Acceptor Conjugated Polymers
作者:Jiancheng Rao、Liuqing Yang、Xuefei Li、Lei Zhao、Shumeng Wang、Junqiao Ding、Lixiang Wang
DOI:10.1002/anie.202006034
日期:2020.10.5
analogue with no TADF, consequently, the meta‐linked polymer shows a strong delayed fluorescence. Its corresponding solution‐processed organic light‐emitting diodes (OLEDs) achieve a promising external quantum efficiency (EQE) of 15.4 % (51.9 cd A−1, 50.9 lm W−1) and CIE coordinates of (0.34, 0.57). The results highlight the bright future of D‐A conjugatedpolymers used for TADFOLEDs.
提议使用meta结在供体-受体(D-A)共轭聚合物中实现有效的热激活延迟荧光(TADF)。作为概念的证明,以三苯胺(D)和二氰基苯(A)为基础,通过改变它们的连接位点,开发了一系列D-A共轭聚合物。当d和A之间的连接点是从对位间位调谐,单线-三线态能量分裂(ΔE ST)被发现是从0.44显著降低到0.10电子伏特,因为增加的空穴-电子的分离。因此,与没有TADF的对联类似物不同,间联聚合物显示出强烈的延迟荧光。其相应的溶液处理有机发光二极管(OLED)实现了15.4%(51.9 cd A -1的外部量子效率(EQE)),50.9 lm W -1)和CIE坐标为(0.34,0.57)。结果凸显了用于TADF OLED的D‐A共轭聚合物的光明前景。
Synthesis and properties of a new AIE macrocyclic emitter with triarylamine backbone
A newmacrocyclic AIE emitter composed of triarylamine backbone was successfully synthesized through convenient homocoupling procedure and easily purified by silica gel column chromatography, and recrystallization. The optical and electrochemical properties of the compound have been investigated. Intriguingly, the compound shows dual emission both 423 nm and 505 nm. This result implied that the violet
Feasible energy level tuning in polymer solar cells based on broad band-gap polytriphenylamine derivatives
作者:Bin Zhang、Guiting Chen、Jin Xu、Liwen Hu、Wei Yang
DOI:10.1039/c5nj02124c
日期:——
Four triphenylamine based broad band-gap polymers with different substituted groups [–OC8H17, –C8H17, –CF3, –(CF3)2] were designed and synthesized, and the HOMO energy levels and Vocs of these polymer based PSCs could be tuned feasibly.
The present invention relates, inter alia, to compositions comprising, a compound which is able to emit and/or absorb light and a compound which is able either to absorb or emit light, where both compounds each include at least one fluorine radical. The present invention is furthermore directed to a process for the preparation of the composition, to the use of the composition in electronic devices and to the device itself.
A series of donor-acceptor (D-A) alternating copolymers (P1, P2 and P3) with thiophene -benzothiadiazole-thiophene-triphenylamine main chain have been synthesized by Suzuki poly-condensation. P1, P2, and P3 possess medium optical band gaps of 1.99, 1.97 and 1.93 eV, respectively. Bulk heterojunction polymer solar cells (BHJ PSCs) with these polymers as donor and PC71BM as acceptor showed power conversion efficiency (PCE) in the range of 2.1-2.8%. The highest PCE of 2.8 % was achieved for P1 with short circuit current (J(SC),) of 7.8 mA/cm(2). This study offers a useful and important insight for designing triphenylamine derivative-based polymers used for efficient PSCs. (C) 2011 Elsevier Ltd. All rights reserved.