Novel Hole‐Transport Material for Efficient Polymer Light‐Emitting Diodes by Photoreaction

Abstract

Abstract Summary: The photo‐crosslinking of carbazole dendrimers was analyzed by UV and IR spectroscopic methods. Photoirradiation results in the formation of a film that is insoluble in toluene and benzene. Time‐of‐flight mass spectrometry studies revealed that the photoirradiation lead to an oligomerization of the dendrimer through crosslinking. The resulting insoluble dendrimer film could be applied as a hole‐transport layer in efficient polymer electroluminescence devices (PLEDs). Luminance‐voltage characteristics for PLEDs wherein PEDOT:PSS and CbzG3 complex with SnCl 2 were employed as the hole transport layer (ITO/HTL/EML/Ca/Ag). magnified image Luminance‐voltage characteristics for PLEDs wherein PEDOT:PSS and CbzG3 complex with SnCl 2 were employed as the hole transport layer (ITO/HTL/EML/Ca/Ag).