Triarylphosphine oxide-phenanthroline molecular conjugate as a promising doped electron-transport layer for organic light-emitting diodes

n-Doping a facilely available phenanthroline derivative Phen-NaDPO greatly increases its electron conductivity up to 3.3 × 10−4 S m−1. Besides organic light-emitting diodes, this doped electron-transport layer may find applications in optoelectronic devices where a robust cathode interlayer is needed.164