An ordered, self-assembled nanocomposite with efficient electronic and ionic transport
An ordered, self-assembled nanocomposite with efficient electronic and ionic transport
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DOI：
10.1038/s41563-023-01476-6
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发表时间：
2023-02
期刊：
影响因子：
41.2
通讯作者：
T. Quill;G. LeCroy;David M. Halat;Rajendar Sheelamanthula;A. Marks;Lorena S. Grundy;Iain McCulloch;J. Reimer;N. Balsara;Alexander Giovannitti;A. Salleo;C. Takacs
中科院分区：
文献类型：
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作者：
T. Quill;G. LeCroy;David M. Halat;Rajendar Sheelamanthula;A. Marks;Lorena S. Grundy;Iain McCulloch;J. Reimer;N. Balsara;Alexander Giovannitti;A. Salleo;C. Takacs
混合导体是一类重要的功能固体，它可以有效地传导离子和电子。在这里，我们展示了一种有机纳米复合材料，当有机半导体与离子液体混合时自发形成，并表现出有效的室温混合导电。我们使用一种聚合物，已知形成一个半结晶的微结构模板离子嵌入到侧链域的微晶，这使得电子传输途径完整。因此，所得到的材料是有序的，表现出刚性半导体片和软离子传导层的交替层。这种独特的双网络微结构导致动态离子/电子纳米复合材料具有液体状离子传输和高度移动的电子电荷。使用的组合操作X-射线散射和原位光谱，我们确认了有序的纳米复合材料的结构，并揭示了机制，引起有效的电子传输。这些结果为有机半导体中的电荷传输提供了基本的见解，并为这些纳米复合材料的未来改进提供了途径。
Mixed conductors—materials that can efficiently conduct both ionic and electronic species—are an important class of functional solids. Here we demonstrate an organic nanocomposite that spontaneously forms when mixing an organic semiconductor with an ionic liquid and exhibits efficient room-temperature mixed conduction. We use a polymer known to form a semicrystalline microstructure to template ion intercalation into the side-chain domains of the crystallites, which leaves electronic transport pathways intact. Thus, the resulting material is ordered, exhibiting alternating layers of rigid semiconducting sheets and soft ion-conducting layers. This unique dual-network microstructure leads to a dynamic ionic/electronic nanocomposite with liquid-like ionic transport and highly mobile electronic charges. Using a combination of operando X-ray scattering and in situ spectroscopy, we confirm the ordered structure of the nanocomposite and uncover the mechanisms that give rise to efficient electron transport. These results provide fundamental insights into charge transport in organic semiconductors, as well as suggesting a pathway towards future improvements in these nanocomposites.