Liu Jiahui, Liu Junjie, Li Haoyuan, Bin Zhengyang, You Jingsong
Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 610064, Chengdu, P. R. China.
School of Microelectronics, Shanghai University, 201800, Shanghai, P. R. China.
Angew Chem Int Ed Engl. 2023 Aug 1;62(31):e202306471. doi: 10.1002/anie.202306471. Epub 2023 Jun 26.
Narrowband organic light-emitting diodes (OLEDs) are receiving significant attention and have demonstrated impressive performance in blue and green OLEDs. However, developing high-performance narrowband red OLEDs remains a highly desired yet challenging task. Herein, we have developed narrowband red fluorescent emitters by utilizing a boron-dipyrromethene (BODIPY) skeleton in combination with a methyl-shield strategy. These emitters exhibit small full-width at half-maxima (FWHM) ranging from 21 nm (0.068 eV) to 25 nm (0.081 eV) and high photoluminescence quantum yields (Φ ) ranging from 88.5 % to 99.0 % in toluene solution. Using BODIPY-based luminescent materials as emitters, high-performance narrowband red OLEDs have been assembled with external quantum efficiency as high as 18.3 % at 623 nm and 21.1 % at 604 nm. This work represents, to our knowledge, the first successful case of achieving NTSC pure-red OLEDs with the Commission Internationale de l'Éclairage (CIE) coordinates of [0.67, 0.33] based on conventional fluorescent emitters.
窄带有机发光二极管（OLED）正受到广泛关注，并已在蓝色和绿色OLED中展现出令人印象深刻的性能。然而，开发高性能窄带红色OLED仍然是一项备受期待但具有挑战性的任务。在此，我们通过利用硼二吡咯亚甲基（BODIPY）骨架并结合甲基屏蔽策略，开发出了窄带红色荧光发射体。这些发射体在甲苯溶液中表现出半高宽（FWHM）较小，范围从21 nm（0.068 eV）到25 nm（0.081 eV），以及高光致发光量子产率（Φ），范围从88.5%到99.0%。以基于BODIPY的发光材料作为发射体，已组装出高性能窄带红色OLED，在623 nm处的外量子效率高达18.3%，在604 nm处为21.1%。据我们所知，这项工作代表了基于传统荧光发射体实现国际照明委员会（CIE）坐标为[0.67, 0.33]的NTSC纯红色OLED的首个成功案例。
