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• W2999606487 abstract "Metal-free organic phosphorescentmaterials are promising alternativesto the organometallic counterparts predominantly adopted in organiclight-emitting diodes due to their low cost, chemical stability, andlarge molecular design window. However, only a few reports on OLEDdevices incorporating metal-free organic phosphors have been presenteddue to the lack of understanding on material properties, device physics,and device fabrication processes. Here, we report a tailor-designednovel fluorene-based organic phosphor with efficient spin–orbitcoupling activated by bromine, aromatic carbonyl, and spiro-annulatedphenyl moieties. Photoluminescence quantum yield of 24.0% was achievedwhen doped in optically inert amorphous polymer hosts. Effects ofOLED host materials on the phosphor were investigated in terms ofcolor purity, suppression of exciplex emission, and restraint of molecularmotion. Bright green phosphorescence emission (1430 cd/m2 at 100 mA/cm2) was realized with 2.5% maximum externalquantum efficiency at 1 mA/cm2." @default.
• W2999606487 created "2020-01-23" @default.
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• W2999606487 date "2020-01-19" @default.
• W2999606487 modified "2023-09-26" @default.
• W2999606487 title "OrganicLight-Emitting Diode Employing Metal-FreeOrganic Phosphor" @default.
• W2999606487 doi "https://doi.org/10.1021/acsami.9b20181.s001" @default.
• W2999606487 hasPublicationYear "2020" @default.
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