Alkylated Indolo[3,2,1-Jk]carbazoles as New Building Blocks for Solution Processable Organic Electronics

18 August 2020, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


A facile strategy for the introduction of tert-butyl and hexyl chains to the indolo[3,2,1-jk]carbazole scaffold is presented. With these building blocks six materials based on three different 4,4ʹ-bis(N- carbazolyl)-1,1ʹ-biphenyl derivatives with varying degree of planarization were prepared. Characterization of the materials showed that the alkyl chains have only minor effects on the photophysical properties of the compounds. In contrast, thermal robustness towards decomposition and electrochemical stability are increased by the introduced alkyl chains. Detailed investigation of the solubility in five different solvents revealed that the incorporation of the alkyl chains increases the solubility significantly. The increased solubility of the materials allowed the application as host materials in red, green and blue solution processed PhOLEDs. Hence, this work presents the first solution processed OLED devices based on the indolo[3,2,1-jk]carbazole scaffold.


solution processable materials
PhOLED host molecules

Supplementary materials

SI final


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