摘要
Simultaneously realizing the optical and electrical properties of organic materials is always challenging.Herein,a convenient and promising strategy for designing organic materials with integrated optoelectronic properties based on cocrystal engineering has been put forward.By selecting the fluorene(Flu)and the 7,7′,8,8′-tetracyanoquinodimethane(TCNQ)as functional constituents,the Flu-TCNQ cocrystal prepared shows deep red emission at 702 nm,which is comparable to the commercialized red quantum dot.The highest electron mobility of organic field-effect transistor(OFET)based on Flu-TCNQ is 0.32 cm^(2)V^(−1)s^(−1).Spectroscopic analysis indicates that the intermolecular driving force contributing to the co-assembly of Flu-TCNQ is mainly charge transfer(CT)interaction,which leads to its different optoelectronic properties from constituents.
基金
The authors acknowledge financial support from the National Key R&D Program(No.2017YFA0204503)
the National Natural Science Foundation of China(Grant Nos.21875158,51733004,and 91833306)
the Natural Science Foundation of Tianjin City(No.20JCJQJC00300).
