Zhang Yu, Li Yupeng, Quan Yiwu, Ye Shanghui, Cheng Yixiang
Key Laboratory of High Performance Polymer Materials and Technology of Ministry of Education, School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China.
Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials, National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 210023, Nanjing, China.
Angew Chem Int Ed Engl. 2023 Jan 2;62(1):e202214424. doi: 10.1002/anie.202214424. Epub 2022 Nov 29.
White circularly polarized organic light-emitting diodes (CP-WOLEDs) are of great significance in potential lighting sources and full-color 3D displays. However, High-performance white CP-EL sources are almost unexplored. We have constructed full-color CP-EL devices based on chiral co-assemblies by using three achiral conjugated pyrene-based dyes (BP, w-WP and c-WP) doped with chiral binaphthyl-based enantiomers (S-/R-M) as the EMLs through an intermolecular chirality induction mechanism. (S-/R-M) -(c-WP) films exhibit regular helix nanofibers under annealing treatment and emit strong white CPL. Significantly, remarkable CP-WOLEDs based on (S-/R-M) -(c-WP) were achieved with |g | values as high as 6.2×10 and an excellent CRI of 98 at the CIE coordinates of (0.33, 0.33). These are the highest g and CRI values of reported CP-WOLEDs to date. This is the first achievement of CP-WOLEDs based on chiral co-assembled helix nanofiber emitters, and provides a valuable strategy with which to develop white CP-EL for future practical applications.
白色圆偏振有机发光二极管（CP-WOLEDs）在潜在照明光源和全彩3D显示方面具有重要意义。然而，高性能白色圆偏振电致发光（CP-EL）源几乎尚未得到探索。我们通过分子间手性诱导机制，使用三种非手性的芘基共轭染料（BP、w-WP和c-WP）掺杂手性联萘基对映体（S-/R-M）作为发光层，构建了基于手性共组装的全彩CP-EL器件。（S-/R-M）-（c-WP）薄膜在退火处理下呈现出规则的螺旋纳米纤维，并发射出强烈的白色圆偏振光。值得注意的是，基于（S-/R-M）-（c-WP）实现了显著的CP-WOLEDs，在CIE坐标（0.33, 0.33）下，|g|值高达6.2×10 ，显色指数（CRI）高达98。这些是迄今为止报道的CP-WOLEDs的最高g值和CRI值。这是基于手性共组装螺旋纳米纤维发射体的CP-WOLEDs的首次成果，并为未来实际应用开发白色CP-EL提供了一种有价值的策略。
