| Title |
Modified 1,2-diphenylbenzoimidazole materials for green and sky-blue emission OLEDs / |
| Authors |
Macionis, S ; Simokaitiene, J ; Grazulevicius, J.V ; Lee, J.H ; Chen, C.H ; Lin, B.Y ; Chiu, T.L |
| DOI |
10.15388/CCT.2023 |
| ISBN |
9786090708330 |
| Full Text |
|
| Is Part of |
Chemistry and chemical technology: international conference CCT-2023, March 10, 2023, Vilnius: conference book.. Vilnius : Vilnius university press, 2023. P 047, p. 84.. ISBN 9786090708330 |
| Abstract [eng] |
Organic light-emitting diode (OLED) technology have been steadily growing for more than two decades and have become a staple among modern lighting technologies [1]. With the discovery of thermally activated delayed fluorescence (TADF) [2] back in 2014, up to this day, the need for efficient, long-lasting and high color purity materials is ever increasing [3, 4]. In this work we present two novel 1,2-diphenylbenzoimidazole materials with cyano and di-tertbutylcarbazole substituents as host for green and sky-blue OLEDs. Materials presented were synthesized in a simple two-step synthesis process. In the first step difluoro-substituted benzimidazoles were formed via cyclization process from corresponding fluoro-substituted aromatic aldehydes and N-phenylbenzene-1,3- diamine, followed up by a second step simple and efficient nucleophilic substitution reactions to introduce electron donating 3,6-di-tert-butylcarbazole moieties. Thermal, electrochemical and photophysical properties of presented materials were tested and OLED devices were formed with external quantum efficiency up to 13%. |
| Published |
Vilnius : Vilnius university press, 2023 |
| Type |
Conference paper |
| Language |
English |
| Publication date |
2023 |
| CC license |
|
