Novel blue anthracene emitters based on improved rigidity of the phenanthro-oxazole side group

Abstract

We designed and synthesized two new blue materials, namely 9,10-bis(4-(4,5-diphenyloxazol-2-yl)phenyl)anthracene (DPO-An) and 9,10-bis(4-(phenanthro[9,10-d]oxazol-2-yl)phenyl)anthracene (PO-An). Both DPO-An and PO-An materials show maximum photoluminescence wavelengths of 443 nm and 449 nm, respectively. These materials emit deep-blue light with high PLQY values of 80% and 82% in the solution state. Additionally, these two materials exhibit remarkable thermal stability, with decomposition temperatures exceeding 440 °C. In non-doped devices using DPO-An and PO-An as the emitting layer, electroluminescence peaks at 455 nm and 468 nm were observed, with Commission Internationale de L’Eclairage coordinates of (0.17, 0.24) and (0.18, 0.26), respectively.

Keywords:

• OLED
• blue
• anthracene
• oxazole

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education (2020R1A6A1A03048004). This work was supported by the Technology Innovation Program (20017832, Development of TiN-based electrode materials and ALD equipment for 10-nm DRAM capacitor electrode deposition process) funded By the Ministry of Trade, Industry & Energy(MOTIE, Korea). This work was supported by the Korea Institute for Advancement of Technology(KIAT) and the Ministry of Trade, Industry & Energy(MOTIE) of the Republic of Korea (No. P0017363). This research was supported by Basic Science Research Capacity Enhancement Project through Korea Basic Science Institute (National research Facilities and Equipment Center) grant funded by the Ministry of Education.(No. 2019R1A6C1010052). This work was partly supported by the GRRC program of Gyeonggi province [(GRRCKYUNGHEE2023-B01), Development of ultra-fine process materials based on the sub-nanometer class for the next-generation semiconductors]. This research is partially funded by the BK21 FOUR program of National Research Foundation of Korea (GS-5-NON-20222739).