Abstract
Thermally activated delayed fluorescent (TADF) emitting materials, 4, 5-bis(benzofuro[3, 2-c]carbazol-5-yl)phthalonitrile (BFCzPN) and 4, 5-bis(benzo[4, 5]thieno[3, 2-c]carbazol-5-yl)phthalonitrile (BTCzPN), were synthesized and fabricated as organic light emitting diodes (OLEDs). Benzofurocarbazole and benzothienocarbazole were used as donors and phthalonitrile was an acceptor. Highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) distribution of BFCzPN and BTCzPN were well separated and small singlet-triplet energy gap of 0.13 and 0.17 eV were measured, respectively. BFCzPN and BTCzPN showed 12.4 and 11.8% of maximum quantum efficiency as thermally activated delayed fluorescent emitters.
| Original language | English |
|---|---|
| Pages (from-to) | 502-504 |
| Number of pages | 3 |
| Journal | Digest of Technical Papers - SID International Symposium |
| Volume | 46 |
| Issue number | Book 1 |
| DOIs | |
| State | Published - 1 Jun 2015 |
| Event | 2015 SID International Symposium - San Jose, United States Duration: 2 Jun 2015 → 3 Jun 2015 |
Keywords
- Fluorescent dopant materials
- OLEDS
- Thermally activated delayed fluorescence
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