3,12-Diphenyl-5,6,9,10-tetrahydro-<i>furan-1,3-diono-[5]helicene (M207),  was synthesized in good yield and was successfully demonstrated as a novel emissive material for OLED.  The compound showed excellent thermal properties with Tg at 152 �C and Tm at 315 �C.  The energy level of LUMO at -3.7 eV and HOMO at -5.9 eV of this compound were determined using CV technique.  The photoluminescence spectrum of a dilute solution in chloroform showed a peak at 503 nm with a full-width at half-maximum of 78 nm and the fluorescence quantum yield was 0.65.  The compound was employed as an emitter for OLED with a configuration of ITO/PEDOT:PSS (35nm)/M207 (40nm)/Ca (10nm)/Al (100nm).  The OLED exhibited a turn-on voltage of 5.3 V and produced a green emission with CIE coordinates of (0.24, 0.53) and the maximum brightness of 3,592 cd/m2 at 9.0 V.  As a result, M207 is the excellent candidate for high thermal stability emissive material for OLED.

[5]Helicene derivative: Novel thermally stable emitting material for OLED

245th National Meeting (2013)

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