title: Vectorial diffusion for facile solution-processed self-assembly of insoluble semiconductors: a case study on metal phthalocyanines.
abstract: Solution processibility is one of the most intriguing properties of organic semiconductors. However, it is difficult to find a suitable solvent and solution process for most semiconductors. For example, metal phthalocyanines (MPcs) are only soluble in non-volatile solvents, which prevent their applications from solution process. For the first time, vectorial diffusion is utilized for solution processing of MPcs. The obtained large F16CuPc and α-phase CuPc crystals and the efficient phase separation of them suggest the vectorial diffusion process is as slow as a self-assembly process, which is helpful to yield large crystals and purify the semiconductors. This method, which only uses common commercial solvents without any complex and expensive instruments and high-temperature operation, provides a facile approach for purification of organic semiconductors and growth of their crystals in large quantities.
authors: Institute for Physics and IMN MacroNano, Technical University of Ilmenau, Ilmenau 98693 (Germany).
authors: Chengliang
authors: C
authors: Wang
authors: Yaoguo
authors: Y
authors: Fang
authors: Liaoyong
authors: L
authors: Wen
authors: Min
authors: M
authors: Zhou
authors: Yang
authors: Y
authors: Xu
authors: Huaping
authors: H
authors: Zhao
authors: Luisa
authors: L
authors: De Cola
authors: Wenping
authors: W
authors: Hu
authors: Yong
authors: Y
authors: Lei
keywords: organic semiconductors; phthalocyanine; self-assembly; solution processing; vectorial diffusion