Synthesis and Application in Organic Light Emitting Diodes of Thermally Activated Delayed Fluorescence Molecules Based on 1,3-Indione as Acceptor

doi:10.7517/j.issn.1674-0475.2017.04.030

Abstract

Abstract:

Novel electron acceptor 2,2-dimethyl-1,3-dione is synthesized and applied for thermally activated delayed fluorescence (TADF) molecular design. We synthesized a series of TADF molecules based on 2,2-dimethyl-1,3-dione with different emission color:IDYD, IDPXZ and ID2PXZ. The organic light emitting diodes (OLEDs) device based on IDYD exhibits blue emission with CIE coordinate of (0.27, 0.31), and the maximum external quantum efficiency (EQE) reaches 2.13%. While the OLEDs device based on IDPXZ exhibits orange emission with CIE coordinate of (0.43,0.53) and the maximum external quantum efficiency (EQE) reaches 1.31%. For the OLEDs device based on ID2PXZ exhibits yellow emission with CIE coordinate of (0.41, 0.54), and the maximum external quantum efficiency (EQE) reaches 2.55%. The results show that 2,2-dimethyl-1,3-indenone can be used as an electron acceptor for TADF molecule design and have a decent prospect in full-color OLEDs devices.

Key words: thermally activated delayed fluorescence, organic light emitting diodes, reverse intersystem crossing, energy transfer

CHEN Dongyang, LIU Wei, WANG Kai, ZHENG Caijun, ZHANG Xiaohong. Synthesis and Application in Organic Light Emitting Diodes of Thermally Activated Delayed Fluorescence Molecules Based on 1,3-Indione as Acceptor[J]. Imaging Science and Photochemistry, 2017, 35(5): 698-711.

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