| Title |
3-(N,N-diphenylamino)carbazole donor containing bipolar derivatives with very high glass transition temperatures as potential TADF emitters for OLEDs |
| Authors |
Tavgeniene, Daiva ; Beresneviciute, Raminta ; Blazevicius, Dovydas ; Krucaite, Gintare ; Jacunskaite, Greta ; Sudheendran Swayamprabha, Sujith ; Jou, Jwo-Huei ; Grigalevicius, Saulius |
| DOI |
10.3390/coatings12070932 |
| Full Text |
|
| Is Part of |
Coatings.. Basel : MDPI. 2022, vol. 12, iss. 7, art. no. 932, p. 1-10.. ISSN 2079-6412 |
| Keywords [eng] |
amorphous material ; synthesis ; organic light emitting diode ; efficiency ; emitter |
| Abstract [eng] |
Well-defined electroactive bipolar derivatives of new structure have been synthesized from 3-(N,N-diphenylamino)-9H-carbazole and bis(4-fluorophenyl)sulfone, 4-fluorophenylsulfone or 4,4′-difluorobenzophenone, respectively. The full characterization of their structure is described. The amorphous materials with very high glass transition temperatures of 111–173 °C also possess high thermal stability, with onset decomposition temperatures of 351–398 °C. Some of the compounds having the best solubility were tested as the emitters dispersed in 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP) host for preparation of organic light emitting diodes (OLEDs). A device containing 15 wt% of the guest bis[4-{3-(N,N-diphenylamino)carbazol-9-yl}phenyl] sulfone demonstrated the best overall characteristics with maximum brightness exceeding 2630 cd/m2, current efficiency of 3.2 cd/A, power efficiency of 2.2 lm/W, and external quantum efficiency exceeding 1.7% at 100 cd/m2. |
| Published |
Basel : MDPI |
| Type |
Journal article |
| Language |
English |
| Publication date |
2022 |
| CC license |
|
