基于四取代咔唑衍生物的双极主体材料及溶液加工绿色磷光OLED

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Abstract：Two tetrasubstituted carbazole derivatives TBICz and TOXDCz havebeen designedand synthesized， which possess the twist skeletonsand exhibit excellentthermal and morphological stabilities.Utilizing these novel compoundsashostmaterial，high efficiencysolution-processed greenphosphorescentorganic light-emiting diodes （PhOLEDs）have been achieved.The high triplet energies of TBICz and TOXDCz ensure efficient energy transfer from the host to the phosphor and triplet exciton confinement on the phosphor.Solution-processable green phosphorescent devices employing Ir（ppy）3 as guest and the two tetrasubstituted carbazole derivatives as hosts exhibit high efficiencies.The bestEL performance isachieved forthe TBICz-based device，witha maximum current efficiencyof 27.3cd/A，a maximum power efficiency of 15.9lm/W ，and a maximum external quantum efficiency of 7.8% ， which provides more host material options for solution-processed OLEDs.

KeyWords：tetrasubstituted carbazolederivatives；green phosphorescentorganic light-emiting diodes；solution-pro cessed;bipolar host

CLCnumber：O482.31；TN312.8 Document code：A

DOI：10.37188/CJL.20250140 CSTR：32170.14.CJL.20250140

摘要：主体材料的选择对改善有机发光二极管（OLED）的性能具有极其重要的作用。（剩余23884字）