The charge carrier mobility, governing the operation speed of organic field-effect transistors, is a critical parameter in memory devices. Aligned ferroelectric single crystals of (3-pyrrolinium)(CdCl₃) were grown, from solutions, onto aligned semiconducting C₆₀ single crystals using an orthogonal solvent. FETs based on the obtained ferroelectric/semiconductor bilayered single crystals exhibited a large memory window (V_T shift of 66 ± 7 V), a long retention time, a high cycle endurance, and, equally importantly, a high electron mobility of 1.28 ± 0.41 cm² V⁻¹ s⁻¹ . Interfacing the molecular ferroelectric single crystals with organic semiconducting single crystals through the solution growth method provides a facile approach to fabricate high-performance FET-based memory devices. Expanding the material systems to construct varied multilayered highly crystalline films should further help realization of multifunctional FETs based on organic single crystals.

Jiake Wu, Congcheng Fan, Guobiao Xue, Tao Ye, Shuang Liu, Ruoqian Lin, Hongzheng Chen, Huolin L. Xin, Ren-Gen Xiong,* and Hanying Li*, Interfacing Solution-Grown C₆₀ and (3-Pyrrolinium)(CdCl₃) Single Crystals for High-Mobility Transistor-Based Memory Devices, Adv. Mater. 2015, DOI: 10.1002/adma.201501577.

Link: http://onlinelibrary.wiley.com/doi/10.1002/adma.201501577/full