Realization of high-power-efficiency white electroluminescence from a single polymer by energy-level engineering.

ABSTRACT: Single white light-emitting polymers (SWPs) represent a high-fidelity system for generating white light emission from polymers without phase separation compared to polymer blend systems. However, their device performance so far has been limited because of the unwanted hole scattering caused by an energy-level mismatch between emitters and hosts, and the large injection barrier at the polymer/anode interface. Here, we report novel poly(arylene phosphine oxide)-based all-phosphorescent SWPs by using the combination of a high-HOMO-level blue phosphor and high-HOMO-level poly(arylene phosphine oxide) host to achieve a low turn-on voltage of 2.8 V, high external quantum efficiency of 18.0% and remarkable power efficiency of 52.1 lm W^-1, which makes them the most efficient SWPs so far

SUBMITTER: Shao S 

PROVIDER: S-EPMC6289170 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature