Purely Organic Crystals Exhibit Bright Thermally Activated Delayed Fluorescence

• Published in: Angewandte Chemie International Edition Vol. 58; no. 38; pp. 13522 - 13531
• Main Authors: Cai, Xinyi, Qiao, Zhenyang, Li, Mengke, Wu, Xiao, He, Yanmei, Jiang, Xiaofang, Cao, Yong, Su, Shi‐Jian
• Format: Journal Article
• Language: English
• Published: WEINHEIM Wiley 16.09.2019; Wiley Subscription Services, Inc
• Edition: International ed. in English
• Subjects: Aromatic compounds; Chemical compounds; Chemistry; Chemistry, Multidisciplinary; Crystal structure; Crystallinity; Crystals; Doped films; Emissions; Emitters; Energy transfer; Excitons; Fluorescence; intermolecular π–π stacking; luminescence; Optoelectronics; Organic chemistry; Organic crystals; Phosphorescence; Photoluminescence; Physical Sciences; Quantum chemistry; Quantum efficiency; Science & Technology; Sulfur; thermally activated delayed fluorescence; Triazine; ELECTROLUMINESCENCE EFFICIENCY; EXCITED SINGLET; energy transfer; ANISOTROPIC OPTICAL-PROPERTIES; INTRAMOLECULAR CHARGE-TRANSFER; LIGHT-EMITTING-DIODES; MOLECULAR DESIGN; thermally activated delayed fluorescence; luminescence; ROOM-TEMPERATURE PHOSPHORESCENCE; intermolecular pi-pi stacking; SINGLET OXYGEN GENERATION; TRIPLET ENERGY-LEVEL; QUANTUM EFFICIENCY; organic crystals; intermolecular π-π stacking

Thermally activated delayed fluorescent (TADF) materials generally suffer from severe concentration quenching. Efficient non‐doped TADF emitters are generally highly twisted aromatic amine‐based compounds with isolated chemical moieties. Herein we demonstrate that co‐facial packing and strong π–π in...