A new benzimidazole/carbazole hybrid bipolar material for highly efficient deep-blue electrofluorescence, yellow-green electrophosphorescence, and two-color-based white OLEDs
A new benzimidazole/carbazole hybrid bipolar material for highly efficient deep-blue electrofluorescence, yellow-green electrophosphorescence, and two-color-based white OLEDs
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DOI：
10.1039/c0jm02143a
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发表时间：
2010-01-01
影响因子：
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通讯作者：
Wong, Ken-Tsung
中科院分区：
文献类型：
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作者：
Hung, Wen-Yi;Chi, Liang-Chen;Wong, Ken-Tsung
双极性分子CPhBzIm表现出优异的固态光致发光量子产率（Phi（PL）= 69%）、三重态能量（E-T = 2.48 eV）和双极性电荷输运能力（mu（h）接近mu（e）接近10（-6）-10（-5）cm（2）V-1 s（-1））。我们已经用它来制造一个非掺杂的深蓝色有机发光二极管（OLED）表现出良好的性能[eta（ext）= 3%; CIE =（0.16，0.05）]，并作为主体材料的黄绿色磷光OLED [eta（ext）= 19.2%; CIE =（0.42，0.56）]。利用这些双重作用，我们使用CPhBzIm在一个简单的单掺杂，双色基白色OLED（eta（ext）= 7%; CIE = 0.31，0.33）。
The bipolar molecule CPhBzIm exhibits an excellent solid state photoluminescence quantum yield (Phi(PL) = 69%), triplet energy (E-T = 2.48 eV), and bipolar charge transport ability (mu(h) approximate to mu(e) approximate to 10(-6)-10(-5) cm(2) V-1 s(-1)). We have used it to fabricate a non-doped deep-blue organic light emitting diode (OLED) exhibiting promising performance [eta(ext) = 3%; CIE = (0.16, 0.05)] and to serve as host material for a yellow-green phosphorescent OLED [eta(ext) = 19.2%; CIE = (0.42, 0.56)]. Exploiting these dual roles, we used CPhBzIm in a simple singly doped, two-color-based white OLED (eta(ext) = 7%; CIE = 0.31, 0.33).