TY  - JOUR
T1  - Highly efficient dual anthracene core derivatives through optimizing side groups for blue emission
AU  - Lee, Hayoon
AU  - Jo, Minjin
AU  - Yang, Garam
AU  - Jung, Hyocheol
AU  - Kang, Seokwoo
AU  - Park, Jongwook
JO  - Dyes and Pigments
VL  - 146
SP  - 27
EP  - 36
PY  - 2017
DA  - 2017/11/01/
SN  - 0143-7208
DO  - https://doi.org/10.1016/j.dyepig.2017.06.053
UR  - https://www.sciencedirect.com/science/article/pii/S0143720817306605
KW  - OLED
KW  - EML
KW  - Blue emission
KW  - Core-side concept
KW  - 9,9'-bianthracene
AB  - TP-AA-TPB, TP-AA-TPB, TPB-AA-TPB, TP-AA-DPA, TP-AA-TPA, and TPB-AA-TPA were synthesized using a 9,9'-bianthracene (AA core). Through a systematic side group change, we optimized the dual-core chromophore system and investigated the relationship between the core and the side groups. The ultraviolet-visible (UV-Vis) absorption of the six materials showed an intrinsic absorption peaks of anthracene in the range of 360 nm–410 nm and photoluminescence (PL) emission in the blue region. The minimum decomposition temperatures (Td) was 425 °C, the minimum melting temperatures (Tm) was 335 °C, and the minimum glass transition temperatures (Tg) was 176 °C. We achieved excellent overall electroluminescence (EL) efficiency in non-doped OLED devices using the six synthesized materials as emitting layer (EML). TPB-AA-TPA synthesized through size and polarity optimization of the side groups on the AA core had a current efficiency of 8.97 cd/A, power efficiency of 4.43 lm/W, external quantum efficiency (EQE) of 6.37%, and Commission Internationale de L'Eclairage coordinates (CIE) of (0.14, 0.19). TPB-AA-TPA also maintained blue emission and realized the highest EL efficiency among the six synthesized materials.
ER  -