Standard White CP‐OLEDs Performance Achieved by Intramolecular Chirality Transfer Mechanism through Polymer Chain
Yu Zhang, Tongtong Jing, Yiwu Quan, Shanghui Ye, Yixiang Cheng
Abstract
Abstract In this work, a chiral functionalized bis‐benzoxanethonyl unit is introduced into three conjugated polymer backbones ( S ‐/ R ‐BP , S ‐/ R ‐WP1 , and S ‐/ R ‐WP2 ) as the emitting layers (EMLs) of organic light‐emitting diodes (OLEDs) to construct full‐color circularly polarized electroluminescence (CP‐EL) by solution‐processing. Interestingly, standard white CP‐EL based on the monodispersed S ‐/ R ‐WP2 achieves a high color rendering index of 95 at CIE coordinates of (0.33, 0.34). The CP‐OLED performances show the turn‐on voltage of ≈5.8 V, high maximum luminance of ≈3000 cd m −2 , and stable g EL value of 10 −3 in the wavelength range of 425–760 nm. This work is the first example to realize standard white CP‐OLEDs by intramolecular chirality transfer mechanism from chiral blue‐color moiety to achiral red‐color dye through polymer chain, which provides a valuable strategy to develop white CP‐EL for potential lighting and full‐color 3D displays.