Spiro-Carbon-Locking and Sulfur-Embedding Strategy for Constructing Deep-Red Organic Electroluminescent Emitter with High Efficiency
Yexuan Pu
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China
Search for more papers by this authorXinliang Cai
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China
Search for more papers by this authorYupei Qu
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China
Search for more papers by this authorWeibo Cui
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China
Search for more papers by this authorLinjie Li
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China
Search for more papers by this authorCorresponding Author
Prof. Chenglong Li
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China
Search for more papers by this authorCorresponding Author
Dr. Yuewei Zhang
Laboratory of Flexible Electronics Technology, Tsinghua University, Beijing, 100084 P. R. China
Search for more papers by this authorCorresponding Author
Prof. Yue Wang
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China
Jihua Laboratory, 28 Huandao South Road, Foshan, 528200, Guangdong Province P. R. China
Search for more papers by this authorYexuan Pu
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China
Search for more papers by this authorXinliang Cai
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China
Search for more papers by this authorYupei Qu
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China
Search for more papers by this authorWeibo Cui
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China
Search for more papers by this authorLinjie Li
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China
Search for more papers by this authorCorresponding Author
Prof. Chenglong Li
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China
Search for more papers by this authorCorresponding Author
Dr. Yuewei Zhang
Laboratory of Flexible Electronics Technology, Tsinghua University, Beijing, 100084 P. R. China
Search for more papers by this authorCorresponding Author
Prof. Yue Wang
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China
Jihua Laboratory, 28 Huandao South Road, Foshan, 528200, Guangdong Province P. R. China
Search for more papers by this authorAbstract
The discovery of multiple resonance thermally activated delayed fluorescence (MR-TADF) materials with remarkable narrowband emission has opened a new avenue for the development of organic light-emitting diodes (OLEDs) with high color purity. However, the lack of construction strategies for purely red MR-TADF materials significantly impedes their application in full-color high-definition displays. Herein, we propose a unique and handy approach of spiro-carbon-locking and sulfur-embedding strategy to modify the parent MR-TADF framework, resulting in a red MR-TADF emitter with high color purity. The reported MR-TADF molecule (namely, FSBN) demonstrates a pure red emission with an emission maximum of 621 nm in toluene solution. The OLED with FSBN as emitter exhibits Commission Internationale de l’Éclairage (CIE) coordinates of (0.67, 0.33), which exactly matches the red standard defined by the National Television Standards Committee (NTSC). Importantly, the single-host OLED achieves a high power efficiency (PE) of up to 50.1 lm W−1, suggesting the potential for the development of low power consumption red OLEDs.
Conflict of Interests
The authors declare no conflict of interest.
Open Research
Data Availability Statement
Research data are not shared.
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