Efficient white polymer light-emitting diodes (WPLEDs) based on covalent-grafting of into PVK.

Thanks to the straightforward white light of single grafting-type polymers based on earth-abundant Zn(ii)-complexes, producing cost-effective flexible WOLEDs/WPLEDs with good device performance remains a formidable challenge. Herein, by using the polymer with excellent physical properties for single-layer WPLEDs, record-high efficiencies ( = 13.0 cd A, = 6.1 lm W and = 9.2%) and low (. 25%) efficiency roll-off compared to previous organo-Zn-based WOLEDs/WPLEDs are realized. This finding renders single Zn(ii)-complex-grafted polymers a new route to low-cost and large-area flexible WPLEDs for potential full-colour flat displays.