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Highly efficient pyrene-based blue emitters utilizing optimized side groups
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DOI：10.1016/j.dyepig.2024.112596.png)
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Abstract
En 中文
We designed and synthesized two blue fluorescent dopants, 3,8-diisopropyl-N1, N6-diphenyl-N1,N6-bis(8-phenyldibenzo [b,d]furan-2-yl)pyrene-1,6-diamine (DBFDIP) and N1-(dibenzo [b,d]thiophen-2-yl)-3,8-diisopropyl-N1,N6-diphenyl-N6-(8-phenyldibenzo [b,d]thiophen-2-yl)pyrene-1,6-diamine (DBT-DIP), by introducing dibenzofuran and dibenzothiophene side groups, based on pyrene core chromophore. The synthesized two compounds, DBF-DIP and DBT-DIP, exhibited decomposition temperatures (Td) of 496 degrees C and 505 degrees C, respectively, along with glass transition temperatures (Tg) of 170 degrees C and 174 degrees C, indicating their excellent thermal stability. When used as dopants in OLED devices, both DBF-DIP and DBT-DIP exhibited an excellent electroluminescent (EL) device performances with current efficiencies (CE) of over 10 cd/A. Especially, the DBT-DIP device demonstrated a maximum external quantum efficiency of 8.25 % and CE of 11.2 cd/A at 10 mA/ cm2.
Keywords:
LIGHT-EMITTING-DIODES
PHOTOPHYSICAL PROPERTIES
OLEDS