题目：

A Quadruple-Borylated Multiple-Resonance Emitter with para/meta Heteroatomic Patterns for Narrowband Orange-Red Emission

作者：

Xiao-Chun Fan¹, Feng Huang¹, Hao Wu¹, Hui Wang¹, Ying-Chun Cheng¹, Jia Yu^1,2, Kai Wang^1,3,* and Xiao-Hong Zhang^1,2,*

单位：

¹Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, P. R. China

²Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, Jiangsu 215123, P. R. China

³Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University Suzhou, Jiangsu 215123 P. R. China

摘要：

Hindered by spectral broadening issues with redshifted emission, long-wavelength (e.g., maxima beyond 570nm) multiple resonance (MR) emitters with full width at half maxima (FWHMs) below 20nm remain absent. Herein, by strategically embedding diverse boron (B)/nitrogen (N) atomic pairs into a polycyclic aromatic hydrocarbon (PAH) skeleton, we propose a hybrid pattern for the construction of a long-wavelength narrowband MR emitter. The proof-of-concept emitter B4N6-Me realized orange-red emission with an extremely small FWHM of 19nm (energy unit: 70meV), representing the narrowest FWHM among all reported long-wavelength MR emitters. Theoretical calculations revealed that the cooperation of the applied para B-π-N and para B-π-B/N-π-N patterns is complementary, which gives rise to both narrowband and redshift characteristics. The corresponding organic light-emitting diode (OLED) employing B4N6-Me achieved state-of-the-art performance, e.g., a narrowband orange-red emission with an FWHM of 27nm (energy unit: 99meV), an excellent maximum external quantum efficiency (EQE) of 35.8%, and ultralow efficiency roll-off (EQE of 28.4% at 1000cdm⁻²). This work provides new insights into the further molecular design and synthesis of long-wavelength MR emitters.

影响因子：

16.823

分区情况：

一区

链接：

https://onlinelibrary.wiley.com/doi/10.1002/anie.202305580