期刊
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
卷 744, 期 1, 页码 37-44出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/15421406.2022.2055258
关键词
Blue emitter; bulky side group; OLED; phenanthro[9; 10-d]oxazole
资金
- National R&D Program through the National Research Foundation of Korea(NRF) - Ministry of Science ICT [2020M3A7B4002030]
- Basic Science Research Program through the National Research Foundation of Korea(NRF) - Ministry of Education [2020R1A6A1A03048004]
- Korea Institute for Advancement of Technology(KIAT) of the Republic of Korea [P0017363]
- Ministry of Trade, Industry & Energy(MOTIE) of the Republic of Korea [P0017363]
- Korea Basic Science Institute(KBSI) National Research Facilities & Equipment Center(NFEC) grant - Korea government(Ministry of Education) [2019R1A6C1010052]
- Ministry of Health & Welfare (MOHW), Republic of Korea [P0017363] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This article presents the synthesis and characterization of new blue organic emitter materials. These materials exhibit high absorption and emission peaks, as well as good photoluminescence quantum yield. Application in organic light emitting diodes shows that these materials have high current efficiency and quantum efficiency.
The new blue organic emitter materials, 4'-(3-(phenanthro[9,10-d]oxazol-2-yl -)phenyl)-5'-phenyl-1[1,1',:2',1''-tetraphenyl]-4-carbonitrile (m-PO-PPCN) and 4'-(4-(phenanthro[9,10-d]oxazol-2-yl-)phenyl)-5'-phenyl-1[1,1',:2',1''-tetraphenyl]-4- carbonitrile (p-PO-PPCN) have been successfully synthesized and characterized. In the film state, the ultraviolet-visible (UV-Vis) absorption peaks of m-PO-PPCN and p-PO-PPCN were 402 and 413 nm, and the photoluminescence (PL) peaks were 408 and 457 nm. The photoluminescence quantum yield (PLQY) of the two materials was 38.4% and 54.9%. Organic light emitting diodes using m-PO-PPCN and p-PO-PPCN as the emitting layer (EML) showed that m-PO-PPCN had a current efficiency of 0.97 cd/A and an EQE of 1.25%, p-PO-PPCN exhibited current efficiency of 3.69 cd/A and an EQE of 3.46%.
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