堆积
共价有机骨架
掺杂剂
共价键
平面的
材料科学
电导率
电荷(物理)
兴奋剂
各向异性
化学物理
导电体
热传导
有机半导体
纳米技术
化学工程
光电子学
化学
物理化学
有机化学
复合材料
光学
物理
计算机图形学(图像)
量子力学
计算机科学
工程类
作者
Seong‐Wook Kim,Hyeonjung Jung,Mahmut Sait Okyay,Hyuk‐Jun Noh,Sein Chung,Young Hyun Kim,Jong‐Pil Jeon,Bryan M. Wong,Kilwon Cho,Jeong‐Min Seo,Jung‐Woo Yoo,Jong‐Beom Baek
标识
DOI:10.1002/anie.202310560
摘要
The development of covalent organic frameworks (COFs) with efficient charge transport is of immense interest for applications in optoelectronic devices. To enhance COF charge transport properties, electroactive building blocks and dopants can be used to induce extended conduction channels. However, understanding their intricate interplay remains challenging. We designed and synthesized a tailor-made COF structure with electroactive hexaazatriphenylene (HAT) core units and planar dioxin (D) linkages, denoted as HD-COF. With the support of theoretical calculations, we found that the HAT units in the HD-COF induce strong, eclipsed π-π stacking. The unique stacking of HAT units and the weak in-plane conjugation of dioxin linkages leads to efficient anisotropic charge transport. We fabricated HD-COF films to minimize the grain boundary effect of bulk COFs, which resulted in enhanced conductivity. As a result, the HD-COF films showed an electrical conductivity as high as 1.25 S cm-1 after doping with tris(4-bromophenyl)ammoniumyl hexachloroantimonate.
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