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Manipulating the benzenyl π-bridge of bisanthracene derivatives (BDs) for highly efficient deep-blue OLED emitters with CIEy = 0.06
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-12-07 , DOI: 10.1039/d3tc04056a Pengcheng Jin 1 , Xilin Yang 2 , Ben Yang 1 , Xiao-Tian Wang 1 , Wen-Tao Su 1 , Shu-Hang Zhan 1 , Xiliang Chen 1 , Huaming Sun 3 , Shi-Jian Su 2 , Jian-Yong Hu 1
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-12-07 , DOI: 10.1039/d3tc04056a Pengcheng Jin 1 , Xilin Yang 2 , Ben Yang 1 , Xiao-Tian Wang 1 , Wen-Tao Su 1 , Shu-Hang Zhan 1 , Xiliang Chen 1 , Huaming Sun 3 , Shi-Jian Su 2 , Jian-Yong Hu 1
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Due to the difficulty in balancing high efficiency and high color purity, the development of blue luminescent materials remains a significant challenge in the fields of commercial full-color organic light emitting devices (OLEDs) and solid-state lighting. Herein, we report four deep-blue fluorescent emitters with non-donor–acceptor (non-DA)-type and DA-type structures, namely BD1-DMP (non-DA-type), BD1-DOP (non-DA-type), BD3-DMP (DA-type), and BD3-DOP (DA-type), in which molecular manipulation strategies are applied to modify the benzenyl π-bridge of bisanthracene derivatives (BDs) with methyl or methoxy substituents. The incorporation of methyl or methoxy groups results in a large distorted configuration, reducing the degree of molecular conjugation, and the emission peak is limited in the deep-blue region, exhibiting high photoluminescence efficiency. The doped OLED device based on BD1-DMP exhibits deep-blue emission (λem,max = 415 nm), with a maximum external quantum efficiency (EQE) of 7.07% and Commission Internationale de l’Eclairage (CIE) coordinates of (0.15, 0.06), meeting high-definition television (HDTV) display standards. BD1-DMP as the host material and DSA-Ph doped sky-blue devices were further constructed, with a maximum EQE, current efficiency (CE), and luminance of 6.60%, 11.17 cd A−1, and 16 410 cd m−2, respectively. It is worth noting that there is only 1.5% EQE roll-off at 1000 cd m−2. These excellent properties ensure that newly developed BDs can not only be used as doping materials to construct high-efficiency and high-standard deep-blue OLEDs but also as the host material to construct high-efficiency and extremely low roll-off sky-blue devices, which provide more selectivity for the development of deep-blue OLED emitters.
中文翻译：
操纵双蒽衍生物 (BD) 的苯基 π 桥以获得 CIEy = 0.06 的高效深蓝色 OLED 发射器
由于难以平衡高效率和高色纯度，蓝色发光材料的开发仍然是商业全彩有机发光器件（OLED）和固态照明领域的重大挑战。在此，我们报道了四种具有非供体-受体（non-DA）型和DA型结构的深蓝色荧光发射体，即BD1-DMP（非 DA 型）、BD1-DOP（非 DA 型）、BD3-DMP （DA型）和BD3-DOP（DA型），其中应用了分子操纵策略用甲基或甲氧基取代基修饰双蒽衍生物（BD）的苯基π-桥。甲基或甲氧基的引入导致构型发生较大扭曲，降低了分子共轭程度，发射峰被限制在深蓝色区域，表现出较高的光致发光效率。基于BD1-DMP的掺杂OLED器件表现出深蓝色发射（λem,max = 415 nm)，最大外量子效率 (EQE) 为 7.07%，国际照明委员会 (CIE) 坐标为 (0.15, 0.06)，满足高清电视（HDTV）显示标准。进一步构建了BD1-DMP作为主体材料和DSA-Ph掺杂的天蓝色器件，具有最大的EQE、电流效率（CE）和亮度为 6.60%、11.17 cd A−1 和 16 410 cd m−2<分别为a i=19>。值得注意的是，在 1000 cd m 处，EQE 滚降仅为 1.5%−2。这些优异的性能确保新开发的BD不仅可以作为掺杂材料构建高效、高标准的深蓝色OLED，而且可以作为主体材料构建高效、极低滚降的天蓝色器件，为深蓝色OLED发光体的开发提供了更多的选择性。
更新日期：2023-12-07
中文翻译：
操纵双蒽衍生物 (BD) 的苯基 π 桥以获得 CIEy = 0.06 的高效深蓝色 OLED 发射器
由于难以平衡高效率和高色纯度，蓝色发光材料的开发仍然是商业全彩有机发光器件（OLED）和固态照明领域的重大挑战。在此，我们报道了四种具有非供体-受体（non-DA）型和DA型结构的深蓝色荧光发射体，即BD1-DMP（非 DA 型）、BD1-DOP（非 DA 型）、BD3-DMP （DA型）和BD3-DOP（DA型），其中应用了分子操纵策略用甲基或甲氧基取代基修饰双蒽衍生物（BD）的苯基π-桥。甲基或甲氧基的引入导致构型发生较大扭曲，降低了分子共轭程度，发射峰被限制在深蓝色区域，表现出较高的光致发光效率。基于BD1-DMP的掺杂OLED器件表现出深蓝色发射（λem,max = 415 nm)，最大外量子效率 (EQE) 为 7.07%，国际照明委员会 (CIE) 坐标为 (0.15, 0.06)，满足高清电视（HDTV）显示标准。进一步构建了BD1-DMP作为主体材料和DSA-Ph掺杂的天蓝色器件，具有最大的EQE、电流效率（CE）和亮度为 6.60%、11.17 cd A−1 和 16 410 cd m−2<分别为a i=19>。值得注意的是，在 1000 cd m 处，EQE 滚降仅为 1.5%−2。这些优异的性能确保新开发的BD不仅可以作为掺杂材料构建高效、高标准的深蓝色OLED，而且可以作为主体材料构建高效、极低滚降的天蓝色器件，为深蓝色OLED发光体的开发提供了更多的选择性。
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