期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 38, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202206916
关键词
Deep Blue Color; Multiresonance Emitters; Organic Light-Emitting Diodes; Organoboron Emitters; Thermally Activated Delayed Fluorescence
资金
- National Key Basic Research and Development Program of China [2020YFA0715000, 2017YFA0204501]
- National Science Fund of China [22135004, 51903137, 61890942]
- Guangdong Major Project of Basic and Applied Basic Research [2019B030302009]
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory [XHT2020-005]
This study reports a binary-doped skeleton that can generate multi-resonance emitters with wide-range color tunability. The borylation method developed in this research allows for deep blue to pure green emitters with high external quantum efficiency and color purity.
Polycyclo-heteraborin multi-resonance (MR) emitters are promising for high color-purity organic light-emitting diodes (OLEDs). Here, unlike the most common heteroatom ternary-doped (X/B/N) frameworks, a binary-doped (B/N) skeleton is reported with a large energy band for wide-range color tunability. Based on this parent-segment, a one-pot catalyst-free borylation method is developed which generates deep blue to pure green MR emitters from readily available starting materials, with peaks at 426-532 nm and full-width-at-half-maxima of 27-38 nm. Impressively, a maximum external quantum efficiency of nearly 40 % is recorded for the corresponding device with Commission Internationale de l ' Eclairage coordinates of (0.14, 0.16), representing the state-of-the-art performances. This work presents a new paradigm and synthesis of B/N-doped MR emitters and will motivate the study of other novel frameworks.
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