Excimer-based white electroluminescence from supramolecular bulk effects of dumbbell-shaped molecules via attractor-repulsor molecular design
Excimer-based white electroluminescence from supramolecular bulk effects of dumbbell-shaped molecules via attractor-repulsor molecular design
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DOI：
10.1016/j.orgel.2016.12.029
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发表时间：
2017-04
影响因子：
3.2
通讯作者：
Chang-jin Ou;B. Ren;Jiewei Li;Dong-qing Lin;Chao Zhong;Linghai Xie;Jianfeng Zhao;B. Mi;H. Cao
中科院分区：
文献类型：
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作者：
Chang-jin Ou;B. Ren;Jiewei Li;Dong-qing Lin;Chao Zhong;Linghai Xie;Jianfeng Zhao;B. Mi;H. Cao
分子吸引-排斥设计是精确重组有机半导体中活性π链段的原理之一。在本文中，我们展示了两个哑铃形的芘衍生物，DSFXSOPy和DSFDBXPy，检查在庞大的基团，连同控制DSFXPy的超分子相互作用的作用。单晶X-射线衍射证实了SFXSO和SFDBX的大基团具有多种C单键H → O氢键和π-π堆积的超分子接触。它们在薄膜中不同的光致发光曲线代表了它们的超分子空间位阻效应对激子行为的有力证据。基于DSFXSOPy和DSFDBXPy的单组分原型器件表现出明亮的白色光发射，最大电流效率分别为4.52和3.57 cd/A。分子吸引-排斥设计为调节分子堆积、薄膜相态和形貌以及光物理和器件性能开辟了一条途径。
Molecular attractor-repulsor design is one principle to precisely reorganize the active π-segments in organic semiconductors. Herein, we demonstrated two dumbbell-shaped pyrene derivatives, DSFXSOPy and DSFDBXPy, to examine the role of supramolecular interaction at bulky groups, together with the controlled DSFXPy. Bulky groups of SFXSO and SFDBX exhibits diverse supramolecular contacts of multiple Csingle bondH⋯O hydrogen bonds and π-π stacking that were confirmed by single crystal X-ray diffraction. Their different photoluminescence profiles in films represent the robust evidences on their supramolecular steric hindrance effects on exciton behaviours. The single-component prototype devices based on DSFXSOPy and DSFDBXPy exhibited bright white light emission with the maximum current efficiency of 4.52 and 3.57 cd/A, respectively. Molecular attractor-repulsor design opens a way to tune molecular packing, film phase and morphology, as well as photo-physics and device performance.