Synthesis and properties of hyperbranched polymers for white polymer light-emitting diodes.

With the Ir(Brpiq) 2 acac feed ratios from 0.06 mol%, 0.07 mol%, 0.08 mol% to 0.09 mol% in synthesis processes, corresponding to PFCzSDF10Ir6, PFCzSDF10Ir7, PFCzSDF10Ir8 and PFCzSDF10Ir9, respectively, the orange-red wavebands from (Ir(piq) 2 acac) in EL spectra present an increasing trend, indicating the EL spectra of polymers-based PLEDs can be realized and adjusted by simply changing the Ir(Brpiq) 2 acac feed ratios in synthesis processes.

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