Affiliation:
1. Integrated Engineering, Department of Chemical Engineering Kyung Hee University Gyeonggi Republic of Korea 17104
Abstract
In the present study, we report for the first‐time three‐color white‐light emission with high brightness from white‐emitting PeQD organic light‐emitting diodes (WPeQD‐OLEDs) fabricated using a PeQD material and organic emitters. A WPeQD‐OLED bilayer was prepared by depositing a blue‐emitting organic layer on top of a CsPb(Br/I)3 QD layer mixed with N9,N10‐Bis(4‐(tert‐butyl) phenyl)‐N9,N10‐Di‐o‐Tolylanthracene‐9,10‐Diamine (p‐Tb‐o‐Me‐TAD), which were spin‐coated as red and green emitters, respectively. In the WPeQD‐OLED device, charge carriers were distributed by an 9‐(naphthalen‐1‐yl)‐10‐(naphthalen‐2‐yl)anthracene (α,β‐ADN) blue‐emitting host material with a deep highest occupied molecular orbital level. The electroluminescence (EL) spectra of the WPeQD‐OLEDs showed EL maximum peaks at 460, 527, and 640 nm; the CIE color coordinates of the emitted light were (0.33, 0.40). The EL results confirmed that the maximum luminance was 49,000 cd m ‐2 and the maximum luminance efficiency and power efficiency were 4.48 cd A‐1 and 2.16 lm W ‐1.