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DOE OSTI · 1422223

Molecular Assembly-Induced Charge Transfer for Programmable Functionalities

Zhang, Zhuolei·Li, Huashan·Luo, Zhipu·Chang, Shuquan·Li, Zheng·Guan, Mengmeng·Zhou, Ziyao·Liu, Ming·Grossman, Jeffrey C.·Ren, Shenqiang
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Abstract

The donor–acceptor interface within molecular charge transfer (CT) solids plays a vital role in the hybridization of molecular orbitals to determine their carrier transport and electronic delocalization. In this study reported herein, we demonstrate molecular assembly-driven bilayer and crystalline solids, consisting of electron donor dibenzotetrathiafulvalene (DBTTF) and acceptor C 60 , in which interfacial engineering-induced CT degree control is a key parameter for tuning its optical, electronic, and magnetic performance. Compared to the DBTTF/C 60 bilayer structure, the DBTTFC 60 cocrystalline solids show a stronger degree of charge transfer for broad CT absorption and a large dielectric constant. In addition, the DBTTFC 60 cocrystals exhibit distinct CT arrangement-driven anisotropic electron mobility and spin characteristics, which further enables the development of high-penetration and high-energy $γ$-ray photodetectors. The results presented in this paper provide a basis for the design and control of molecular charge transfer solids, which facilitates the integration of such materials into molecular electronics.

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRYCrystal structureCrystalsElectrical propertiesMoleculesVesicles

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Zhang, Zhuolei, Li, Huashan, Luo, Zhipu, Chang, Shuquan, Li, Zheng, Guan, Mengmeng, Zhou, Ziyao, Liu, Ming, Grossman, Jeffrey C., Ren, Shenqiang. 2017-11-09. Molecular Assembly-Induced Charge Transfer for Programmable Functionalities. https://doi.org/10.1021/acs.chemmater.7b04357

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