Effects of Temperature and Solvent on the Energy Transfer and β‐Phase Formation in the Iridium(III) Complex‐Containing Polyfluorene in Solutions and as Suspended Nano‐Particles

The effects of temperature and solvent on the β‐phase formation and energy transfer in an Ir(III) complex‐containing polyfluorene were investigated. Efficient energy transfer from polyfluorenes host to Ir complexes guest can be realized at low temperature. The formation of β‐phase was observed both in THF solution at low temperature and as suspended nano‐particles at room temperature. In addition, phosphorescent polymer nanoparticles were prepared successfully and exhibited efficient phosphorescent emission.