Azulene-based compounds in organic light emitting device elements
   
   

An organic light-emitting device (OLED) in which an azulene based compound is used as an emissive layer and/or one or more charge transport layers, or as a host material, or is doped into a functional layer of an OLED to improve device efficiency.

 
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> Charge-transporting material containing diazapentacene derivative, luminescent material, and organic electroluminescent element employing these

> Organic electroluminescence device
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