Zhao Huan, He Zhiqun, Xu Min, Liang Chunjun, Kumar Sandeep
Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, P. R. China.
Raman Research Institute, C.V. Raman Avenue, Bangalore 560 080, India.
Phys Chem Chem Phys. 2016 Mar 28;18(12):8554-60. doi: 10.1039/c6cp00031b.
An electron transporting anthraquinone derivative demonstrated a stable large-scale homeotropic alignment on an open substrate surface, which substantially improved its charge carrier mobility. The electron mobility (μ(E)) increased by two orders of magnitude from 3.2 × 10(-4) cm(2) V(-1) s(-1) for the film without alignment to 1.2 × 10(-2) cm(2) V(-1) s(-1) for the homeotropically aligned film. A distinct enhancement in the UV absorption spectra of the films around the short wavelength range was observed to be associated with the molecular alignments. These alignments are less sensitive to the substrate under test. The anchoring force of the columnar stacks appears to be related to the nature of the material associated with the strong interaction between the molecules and substrate interface.
一种电子传输蒽醌衍生物在开放的衬底表面表现出稳定的大面积垂直排列，这显著提高了其电荷载流子迁移率。电子迁移率（μ(E)）从无排列的薄膜的3.2×10⁻⁴ cm² V⁻¹ s⁻¹增加了两个数量级，达到垂直排列薄膜的1.2×10⁻² cm² V⁻¹ s⁻¹。观察到薄膜在短波长范围内的紫外吸收光谱有明显增强，这与分子排列有关。这些排列对被测衬底不太敏感。柱状堆叠的锚固力似乎与材料的性质有关，该材料与分子和衬底界面之间的强相互作用有关。
