Abstract：
The strategy of integrating conformational isomerization donors and chiral acceptor in single molecule was proposed to construct white circularly polarized luminescence (WCPL) materials in this work. Consequently, a pair of dual-emission enantiomers, namely (R/S)-DO-PTZ, were designed and synthesized, which displayed white emission with blue and yellow dual-emission bands in solution and solid films at Commission Internationale de l\'Eclairage (CIE) coordinates of (0.30, 0.33) and (0.33, 0.35), respectively. Meanwhile, (R/S)-DO-PTZ exhibited high PLQY of up to 67% in doped films and obvious mirror-image WCPL signals with |glum| value of 3.0 × 10-3. Moreover, white circularly polarized electroluminescence (WCPEL) based on organic light-emitting diodes (OLEDs) with (R/S)-DO-PTZ as emitters were also achieved with CIE coordinates of (0.32, 0.37) and EQEmax of 4.7%, representing the state-of-the-art level of white OLEDs based on single-molecule purely organic emitters. By optimizing the device structure, warm WCPEL devices were further obtained with |gEL| value of 2.8 × 10-3, CIE coordinates of (0.37, 0.48) and EQEmax of up to 15.6%. To our knowledge, this is the first report of CP-WOLEDs based on single-molecule purely organic emitters.
摘要：
在这项工作中，提出了在单分子中整合构象异构化供体和手性受体的策略来构建白色圆偏振发光（WCPL）材料。因此,一对双发射对映异构体，即（R/S）-DO-PTZ，被设计和合成，在溶液和固体薄膜中显示白色发射，蓝色和黄色双发射带，在国际clairage(CIE)坐标为(0.30,0.33)和(0.33,0.35)，分别。同时,（R/S）-DO-PTZ在掺杂薄膜中表现出高达67％的高PLQY，并具有明显的镜像WCPL信号，|glum|值为3.0×10-3。此外，以（R/S）-DO-PTZ为发射器的有机发光二极管（OLED）为基础的白色圆偏振电致发光（WCPEL）也以（0.32，0.37）的CIE坐标和4.7％的EQEmax实现，代表了基于单分子纯有机发射体的白色OLED的最先进水平。通过优化器件结构,进一步获得了温暖的WCPEL器件，其|gEL|值为2.8×10-3，CIE坐标为（0.37，0.48），EQEmax高达15.6％。据我们所知,这是基于单分子纯有机发射器的CP-WOLED的第一份报告。
