当前位置: X-MOL 学术J. Mater. Chem. C › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Fusing acridine and benzofuran/benzothiophene as a novel hybrid donor for high-performance and low efficiency roll-off TADF OLEDs
Journal of Materials Chemistry C ( IF 6.4 ) Pub Date : 2019/12/20 , DOI: 10.1039/c9tc05533a
Qing Zhang 1, 2, 3, 4 , Yaxiong Wang 1, 2, 3, 4 , Sung Joon Yoon 5, 6, 7, 8 , Won Jae Chung 5, 6, 7, 8 , Shaofeng Ye 1, 2, 3, 4 , Runda Guo 1, 2, 3, 4 , Panpan Leng 1, 2, 3, 4 , Shuaiqiang Sun 1, 2, 3, 4 , Jun Yeob Lee 5, 6, 7, 8 , Lei Wang 1, 2, 3, 4
Affiliation  

Two novel acridine-benzofuran/benzothiophene hybrid donors of 34BxAc (x = F, 34BFAc: 13,13-dimethyl-8,13-dihydrobenzofuro[3,2-a]acridine; x = T, 34BTAc: 13,13-dimethyl-8,13-dihydrobenzo[4,5]thieno[3,2-a]acridine) were developed as aromatic fused donors by combining dimethyl acridine (Ac) with benzofuran and benzothiophene, respectively. As a comparison, the hybrid donors of 12BxAc (x = F, 12BFAc: 5,5-dimethyl-5,13-dihydrobenzofuro[3,2-c]acridine; x = T, 12BTAc: 5,5-dimethyl-5,13-dihydrobenzofuro[3,2-c]acridine) were also prepared. By attaching the TPPM (2,4,6-triphenylpyrimidine) acceptor to these fused hybrid donors (12BFAc, 12BTAc, 34BFAc and 34BTAc), 12BxAc-PM (12FAc-PM and 12BTAc-PM) and 34BxAc-PM (34BFAc-PM and 34BTAc-PM) were further designed and synthesized. It was revealed that 34BxAc-PM was better than 12BxAc-PM at shrinking the singlet–triplet energy gap and decay lifetime, and increasing the photoluminescence quantum yield. The sky-blue thermally activated delayed fluorescent organic light-emitting diodes (OLEDs) with 12BFAc-PM as a dopant just showed a maximum external quantum efficiency (EQE) of 12.9% and a CIEx,y of (0.16, 0.29). The 12BTAc-PM-based device achieved a maximum EQE of 25.6%, however, the efficiency roll-off was relatively serious. In contrast, high-performance and low efficiency roll-off OLEDs can be developed using 34BxAc-PM. For instance, the 34BFAc-PM-based device realized a maximum EQE of 27.7%, and still a high EQE of 24.6% at 1000 cd m−2 and 19.6 cd m−2 at 5000 cd m−2, respectively, indicative of the superiorities of the novel donors (34BFAc and 34BTAc).

中文翻译:

融合a啶和苯并呋喃/苯并噻吩作为高性能和低效率滚降TADF OLED的新型杂化供体

34B x Ac的两个新型x啶-苯并呋喃/苯并噻吩杂体供体(x = F,34BFAc:13,13-二甲基-8,13-二氢苯并呋喃[3,2- a ] ac啶; x = T,34BTAc:13,13-通过将二甲基a啶(Ac)分别与苯并呋喃和苯并噻吩结合,开发了作为芳香族稠合供体的二甲基-8,13-二氢苯并[4,5]噻吩并[3,2- a ] ac啶。作为比较,12B x Ac(x = F,12BFAc:5,5-二甲基-5,13-二氢苯并呋喃[3,2- c ] ac啶; x = T,12BTAc:5,5-二甲基- 5,13-二氢苯并呋喃[3,2- c还制备了[ac啶]。通过将TPPM(2,4,6-三苯基嘧啶)受体连接到这些融合的杂交供体(12BFAc,12BTAc,34BFAc和34BTAc),12B x Ac-PM12FAc-PM12BTAc-PM)和34B x Ac-PM(进一步设计和合成了34BFAc-PM34BTAc-PM)。结果表明,34B x Ac-PM优于12B x Ac-PM在缩小单重态-三重态的能隙和衰变寿命,并增加了光致发光的量子产率。具有12BFAc - PM作为掺杂剂的天蓝色热激活延迟荧光有机发光二极管(OLED)刚显示出最大外部量子效率(EQE)为12.9%,CIE x,y为(0.16,0.29)。基于12BTAc-PM的设备的最大EQE达到25.6%,但是,效率下降比较严重。相反,可以使用34B x Ac-PM开发高性能和低效率的滚降OLED 。例如,基于34BFAc-PM的设备在1000 cd m时实现了最高EQE达27.7%,但仍达到了24.6%的高EQE。分别在5000 cd m -2时的-2和19.6 cd m -2,表明了新型供体(34BFAc和34BTAc)的优越性。
更新日期:2020-02-12
down
wechat
bug