Deep‐blue fluorescent compounds are particularly important in organic light‐emitting devices (OLEDs). A donor–accepotor (DA)‐type blue‐emitting compound, 1‐(10‐(4‐methoxyphenyl)anthracen‐9‐yl)‐4‐(10‐(4‐cyanophenyl)anthracen‐9‐yl)benzene (BD3), is synthesized, and for comparison, a nonDA‐type compound, 1,4‐bis(10‐phenylanthracene‐9‐yl)benzene (BD1) and a weak DA‐type compound, 1‐(10‐phenylanthracen‐9‐yl)‐4‐(10‐(4‐cyanophenyl)anthracen‐9‐yl)‐benzene (BD2), are also synthesized. The twisted conformations of the two anthracene units in the compounds, confirmed by single crystal X‐ray analysis, effectively prevent π‐conjugation, and the compound shows deep‐blue photoluminescence (PL) with a high PL quantum efficiency, almost independent of the solvent polarity, resulting from the absence of an intramolecular charge transfer state. The DA‐type molecule BD3 in a non‐doped device exhibits a maximum external quantum efficiency (EQE) of 4.2% with a slight roll‐off, indicating good charge balance due to the DA‐type molecular design. In the doped device with 4,4′‐bis(N‐carbazolyl)‐1,1′‐biphenyl (CBP) host, the BD3 exhibits higher EQE than 10% with Commission International de L'Eclairge (CIE) coordinates of (0.15, 0.06) and a narrow full‐width at half‐maximum of 45 nm, which is close to the CIE of the high definition television standard blue.

中文翻译：

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基于双蒽的施主-受体型发光掺杂剂：有机发光器件中的高效深蓝色发射

深蓝色荧光化合物在有机发光器件（OLED）中尤其重要。供体-负电荷（DA）型发蓝光化合物1-（10-（4-甲氧基苯基）蒽-9-基）-4-（10-（4-氰基苯基）蒽-9-基）苯（BD3）合成，作为比较，非DA型化合物1,4-双（10-苯基蒽-9-9）苯（BD1）和弱DA型化合物1-（10-苯基蒽9-9 ） yl）-4-（10-（4-氰基苯基）蒽-9-yl）-苯（BD2），也已合成。通过单晶X射线分析证实，化合物中两个蒽单元的扭曲构象可有效防止π共轭，并且该化合物显示出深蓝色光致发光（PL），具有高PL量子效率，几乎与溶剂无关由于没有分子内电荷转移状态而产生的极性。非掺杂器件中的DA型分子BD3表现出4.2％的最大外部量子效率（EQE），并有轻微的滚降，这表明由于DA型分子设计而产生的良好电荷平衡。在具有4,4'-双（N-咔唑基）-1,1'-联苯（CBP）主体的掺杂设备中，BD3 在国际照明委员会（CIE）坐标为（0.15，0.06）的情况下，其EQE高于10％，半峰全宽窄为45 nm，接近高清电视标准蓝色的CIE 。