二亚胺
离域电子
苝
分子间力
有机半导体
电子迁移率
材料科学
半导体
微晶
堆积
霍尔效应
化学物理
凝聚态物理
电阻率和电导率
光电子学
化学
有机化学
分子
物理
冶金
量子力学
作者
Yanhua Jia,Qinglin Jiang,Hanlin Gan,Bohan Wang,Xiandong He,Jiadong Zhou,Zetong Ma,Jiang Zhang,Yuguang Ma
摘要
ABSTRACT It is crucial to prepare high-mobility organic polycrystalline film through solution processing. However, the delocalized carrier transport of polycrystalline films in organic semiconductors has rarely been investigated through Hall-effect measurement. This study presents a strategy for building strong intermolecular interactions to fabricate solution-crystallized p-type perylene diimide (PDI) dianion films with a closer intermolecular π–π stacking distance of 3.25 Å. The highly delocalized carriers enable a competitive Hall mobility of 3 cm2 V−1 s−1, comparable to that of the reported high-mobility organic single crystals. The PDI dianion films exhibit a high electrical conductivity of 17 S cm−1 and typical band-like transport, as evidenced by the negative temperature linear coefficient of mobility proportional to T−3/2. This work demonstrates that, as the intermolecular π–π interactions become strong enough, they will display high mobility and conductivity, providing a new approach to developing high-mobility organic semiconductor materials.
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