当前位置: X-MOL 学术Luminescence › 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.)
Indolo[3,2-b]indole-based multi-resonance emitters for efficient narrowband pure-green organic light-emitting diodes
Luminescence ( IF 3.2 ) Pub Date : 2023-11-10 , DOI: 10.1002/bio.4624
Yan-Yun Jing 1, 2 , Yiyu Yang 2 , Nengquan Li 2 , Zeyuan Ye 2 , Xinzhong Wang 1 , Xiaosong Cao 2 , Chuluo Yang 2
Affiliation  

Organic light-emitting diodes (OLEDs) utilizing multi-resonance (MR) emitters show great potential in ultrahigh-definition display benefitting from superior merits of MR emitters such as high color purity and photoluminescence quantum yields. However, the scarcity of narrowband pure-green MR emitters with novel backbones and facile synthesis has limited their further development. Herein, two novel pure-green MR emitters (IDIDBN and tBuIDIDBN) are demonstrated via replacing the carbazole subunits in the bluish-green BCzBN skeleton with new polycyclic aromatic hydrocarbon (PAH) units, 5-phenyl-5,10-dihydroindolo[3,2-b]indole (IDID) and 5-(4-(tert-butyl)phenyl)-5,10-dihydroindolo[3,2-b]indole (tBuIDID), to simultaneously enlarge the π-conjugation and enhance the electron-donating strength. Consequently, a successful red shift from aquamarine to pure-green is realized for IDIDBN and tBuIDIDBN with photoluminescence maxima peaking at 529 and 532 nm, along with Commission Internationale de l'Eclairage (CIE) coordinates of (0.25, 0.71) and (0.28, 0.70). Furthermore, both emitters revealed narrowband emission with small full width at half-maximum (FWHM) below 28 nm. Notably, the narrowband pure-green emission was effectively preserved in corresponding devices, which afford elevated maximum external quantum efficiencies of 16.3% and 18.3% for IDIDBN and tBuIDIDBN.

中文翻译:


用于高效窄带纯绿色有机发光二极管的吲哚[3,2-b]吲哚基多谐振发射器



利用多谐振(MR)发射器的有机发光二极管(OLED)在超高清显示方面显示出巨大的潜力,这得益于MR发射器的卓越优点,例如高色纯度和光致发光量子产率。然而,具有新颖骨架和易于合成的窄带纯绿磁流变发射器的稀缺限制了其进一步发展。在此,通过用新的多环芳烃(PAH)单元5-苯基-5,10-二氢吲哚[3]取代蓝绿色BCzBN骨架中的咔唑亚基,展示了两种新型纯绿色MR发射体(IDIDBN和t BuIDIDBN)。 ,2- b ]吲哚 (IDID) 和 5-(4-(丁基)苯基)-5,10-二氢吲哚并[3,2- b ]吲哚 ( t BuIDID),同时扩大 π 共轭并增强给电子强度。因此,IDIDBN 和t BuIDIDBN 成功实现了从海蓝宝石到纯绿色的红移,光致发光最大值峰值在 529 和 532 nm,国际照明委员会 (CIE) 坐标为 (0.25, 0.71) 和 (0.28) ,0.70)。此外,两种发射器均显示出窄带发射,半峰全宽 (FWHM) 低于 28 nm。值得注意的是,窄带纯绿光发射在相应的器件中得到了有效保留,IDIDBN 和t BuIDIDBN 的最大外量子效率分别提高了 16.3% 和 18.3%。
更新日期:2023-11-10
down
wechat
bug