Improvement of electro-optic performances in white organic light emitting diodes with color stability by buffer layer and multiple dopants structure

Kou Zhi-Qi^†, Tang Yu, Yang Li-Ping, Yang Fei-Yu, Guo Wen-Jun

(color online) Normalized EL spectra and CIE coordinates of devices (a) A1, (b) A2, (c) A3, and (d) A4 at different voltages.