High-efficiency pyrene-based blue light emitting diodes: aggregation suppression using a calixarene 3D-scaffold.

An efficient blue light emitting diode based on solution processable pyrene-1,3-alt-calix[4]arene is demonstrated, providing a record current efficiency of 10.5 cd A(-1) in a simple non-doped OLED configuration. Complete suppression of pyrene aggregation in the solid state is achieved by controlling chromophore dispersion using the 1,3-alt-calix[4]arene scaffold. This journal is © The Royal Society of Chemistry 2012