Standard White CP-OLEDs Performance Achieved by Intramolecular Chirality Transfer Mechanism through Polymer Chain
Standard White CP-OLEDs Performance Achieved by Intramolecular Chirality Transfer Mechanism through Polymer Chain
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DOI：
10.1002/adom.202200915
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发表时间：
2022-07-07
影响因子：
9
通讯作者：
Cheng，Yixiang
中科院分区：
文献类型：
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作者：
Zhang，Yu;Jing，Tongtong;Cheng，Yixiang
在这项工作中，将手性功能化的双苯并氧乙炔基单元引入到三个共轭聚合物主链（S-/R-BP、S-/R-WP1和S-/R-WP2）中作为有机发光二极管（OLED）的发光层（EML），通过溶液处理构建全色圆偏振电致发光（CP-EL）。有趣的是，基于单分散 S-/R-WP2 的标准白色 CP-EL 在 CIE 坐标 (0.33, 0.34) 下实现了 95 的高显色指数。 CP-OLED 性能显示，开启电压约为 5.8 V，最大亮度约为 3000 cd m−2，在 425–760 nm 波长范围内稳定的 gEL 值为 10−3。这项工作是第一个通过分子内手性转移机制实现标准白色CP-OLED的例子，通过聚合物链从手性蓝色部分到非手性红色染料，这为开发用于潜在照明和全彩3D显示器的白色CP-EL提供了有价值的策略。
In this work, a chiral functionalized bis‐benzoxanethonyl unit is introduced into three conjugated polymer backbones (S‐/R‐BP,S‐/R‐WP1, andS‐/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 monodispersedS‐/R‐WP2achieves 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 stablegELvalue of 10−3in 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.