TY  - JOUR
T1  - Optimized triple core blue emitters based on anthracene–pyrene–anthracene chromophores for organic light-emitting diodes
AU  - Kwon, Hyukmin
AU  - Kang, Seokwoo
AU  - Park, Sunwoo
AU  - Lee, Hayoon
AU  - Park, Jongwook
JO  - Dyes and Pigments
VL  - 209
SP  - 110931
PY  - 2023
DA  - 2023/02/01/
SN  - 0143-7208
DO  - https://doi.org/10.1016/j.dyepig.2022.110931
UR  - https://www.sciencedirect.com/science/article/pii/S0143720822008531
KW  - OLED
KW  - Triple core
KW  - Blue emission
KW  - Fluorescence
AB  - Three new fluorescent triple-core emitters were newly synthesized by attaching an optimized electron-donating group to an anthracene–pyrene–anthracene core moiety, resulting in 1,6-di(anthracen-9-yl)pyrene (DAP), 10,10′-(pyrene-1,6-diyl)bis(N,N-diphenylanthracen-9-amine) (DPA–DAP–DPA), and 4,4′-(pyrene-1,6-diylbis(anthracene-10,9-diyl))bis(N,N-diphenylaniline) (TPA–DAP–TPA). The photophysical, thermal, and electroluminescence properties of these synthesized materials were examined experimentally and theoretically. The triple-core derivatives were found to exhibit high thermal stability, with decomposition temperatures greater than 433 °C. DAP, DPA–DAP–DPA, and TPA–DAP–TPA showed deep-blue, sky-blue, and real blue photoluminescence emission, with maximum wavelengths of 430, 497, and 459 nm, respectively, in the solution state. Among the synthesized materials, TPA–DAP–TPA showed an excellent photoluminescence quantum yield of 77%. The device doped with TPA–DAP–TPA showed a high efficiency of 5.68 cd/A, CIE coordinates of (0.143, 0.151), and an external quantum efficiency of 4.64% at 10 mA/cm2, indicating that the device has potential applications in mobile phones.
ER  -