TY  - EJOUR
AU  - Heo, Yeongjae 
AU  - Kwon, Hyukmin 
AU  - Park, Sangwook 
AU  - Dae, Sunwoo 
AU  - Lee, Hayoon 
AU  - Lee, Kiho 
AU  - Park, Jongwook 
TI  - A High-Efficiency Deep Blue Emitter for OLEDs with a New Dual-Core Structure Incorporating ETL Characteristics
T2  - Molecules
PY  - 2023
VL  - 28
IS  - 22
SN  - 1420-3049
AB  - In this study, we introduced the weak electron-accepting oxazole derivative 4,5-diphenyl-2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)oxazole (TPO) into both anthracene and pyrene moieties of a dual core structure. Ultimately, we developed 2-(4-(6-(anthracen-9-yl)pyren-1-yl)phenyl)-4,5-diphenyloxazole (AP-TPO) as the substitution on the second core, pyrene, and 4,5-diphenyl-2-(4-(10-(pyren-1-yl)anthracen-9-yl)phenyl)oxazole (TPO-AP) as the substitution on the first core, anthracene. Both materials exhibited maximum photoluminescence wavelengths at 433 and 443 nm in solution and emitted deep blue light with high photoluminescence quantum yields of 82% and 88%, respectively. When used as the emitting layer in non-doped devices, TPO-AP outperformed AP-TPO, achieving a current efficiency of 5.49 cd/A and an external quantum efficiency of 4.26% in electroluminescence. These materials introduce a new category of deep blue emitters in the organic light-emitting diodes field, combining characteristics related to the electron transport layer.
KW  - OLED
KW  - blue
KW  - dual core
KW  - side group
KW  - oxazole
KW  - ETL
DO  - 10.3390/molecules28227485
ER  -