Details

Autor(en) / Beteiligte

• Chen, Haowen
• Fan, Tianjiao
• Zhao, Guimin
• Zhang, Dongdong
• Li, Guomeng
• Jiang, Wei
• Duan, Lian
• Zhang, Yuewei

Titel

A Simple Molecular Design Strategy for Pure‐Red Multiple Resonance Emitters

Ist Teil von

• Angewandte Chemie International Edition, 2023-05, Vol.62 (20), p.e202300934-n/a

Auflage

International ed. in English

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Though the flourishment of materials with multiple resonance (MR) in blue to green regions, red‐emissive MR emitters are still rare in literatures, which definitely should be resolved for further applications. Herein, we report a simple molecular design strategy for the construction of pure‐red MR emitters by conjugate charge transfer, which could greatly enhance the π‐conjugation degree and charge‐transfer property of the target molecule while maintaining the basic feature of MR, leading to a significant redshift of more than 128 nm compared to the selected parent MR core. The proof‐of‐concept emitter PPZ‐BN exhibited a pure‐red emission with a dominant peak at 613 nm and a small full‐width‐at‐half‐maximum of 0.16 eV (48 nm). The optimized organic light‐emitting diode showed a high external quantum efficiency of 26.9 %, a small efficiency roll‐off, and an excellent operation stability (LT99) of more than 43 hours at an initial luminance of 10 000 cd m−2. A simple strategy to construct pure‐red multiple resonance (MR) emitters was successfully implemented. The proof‐of‐concept molecule PPZ‐BN achieves a significant redshift of more than 125 nm compared to the selected parent MR core. The corresponding narrowband red organic light‐emitting diode shows a high external quantum efficiency of 26.9 %, a small efficiency roll‐off, and an excellent operation stability.