High-Energy-Level Blue Phosphor for Solution-Processed White Organic Light-Emitting Diodes with Efficiency Comparable to Fluorescent Tubes.

ABSTRACT: A high-energy-level blue phosphor FIr-p-OC₈ has been developed for solution-processed white organic light-emitting diodes (WOLEDs) with comparable fluorescent tube efficiency. Benefiting from the electron-donating nature of the introduced alkoxy, FIr-p-OC₈ shows not only efficient blue light but also elevated highest occupied molecular orbital/lowest unoccupied molecular orbital levels to well match the dendritic host H2. Consequently, the hole scattering between FIr-p-OC₈ and H2 can be prevented to favor the direct exciton formation on the blue phosphor, leading to reduced driving voltage and thus improved power efficiency. By exploiting this approach, a maximum power efficiency of 68.5 lm W^-1 is achieved for FIr-p-OC₈-based white dev

SUBMITTER: Wang S 

PROVIDER: S-EPMC6137322 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature