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- W3205240085 abstract "To achieve high electroluminescence efficiency, great efforts are devoted to enhancing photoluminescence quantum yield (ΦPL) and exciton utilization of luminescent molecule, while another important factor, light out-coupling efficiency (ηout), receives less attention in molecule design. Here, we focus on horizontal dipole orientation engineering of the molecule to increase ηout and external quantum efficiency (ηext). A series of tailor-made luminescent molecules consisting of an electron-accepting carbonyl core plus double electron-donating groups of spiro[acridine-9,9′-fluorene] and carbazole derivatives [e.g., 1,3,5-tri(carbazol-9-yl)benzene] are developed and systematically investigated. These molecules hold distinguished merits of strong sky-blue delayed fluorescence with excellent ΦPL values, large horizontal dipole ratios, and balanced bipolar carrier transport, which furnish record-high ηext values of up to 26.1 and 38.6% in nondoped and doped sky-blue organic light-emitting diodes (OLEDs), respectively. Moreover, the state-of-the-art nondoped hybrid white OLED and all-fluorescence single-emitting layer white OLED are also realized, demonstrating great potentials in OLED industry of these molecules." @default.
- W3205240085 created "2021-10-25" @default.
- W3205240085 creator A5035677054 @default.
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- W3205240085 date "2021-10-22" @default.
- W3205240085 modified "2023-10-17" @default.
- W3205240085 title "Boosting external quantum efficiency to 38.6% of sky-blue delayed fluorescence molecules by optimizing horizontal dipole orientation" @default.
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- W3205240085 doi "https://doi.org/10.1126/sciadv.abj2504" @default.
- W3205240085 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8528420" @default.
- W3205240085 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34669483" @default.
- W3205240085 hasPublicationYear "2021" @default.
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