Surface treatment on polyethylenimine interlayer to improve inverted OLED performance
Wei Chang-Ting1, 2, Zhuang Jin-Yong2, Chen Ya-Li1, †, , Zhang Dong-Yu2, ‡, , Su Wen-Ming2, Cui Zheng2
       

EQE–V (Inset: EL spectra.) characteristics of Ir(ppy)3 OLEDs with different surface treatment processes on PEI layer.