The molecular orientation of para-sexiphenyl on Cu(110) and Cu(110) p(2x1)O
The molecular orientation of para-sexiphenyl on Cu(110) and Cu(110) p(2x1)O
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DOI：
10.1002/cphc.200700357
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发表时间：
2007-08-06
期刊：
影响因子：
2.9
通讯作者：
Ramsey, Michael G.
中科院分区：
文献类型：
--
作者：
Oehzelt, Martin;Grill, Leonhard;Ramsey, Michael G.
控制有机半导体的分子生长是优化有机器件性能的一个重要问题。共轭分子用作积木，具有各向异性的形状，也具有各向异性的物理性质，如电荷传输或发光。主要的挑战是生长出具有特定取向的分子的高度结晶层。结晶度越高，这些性质就越接近其全部的内在潜力，而取向决定了薄膜的物理性质。在这里，我们证明了分子的取向和生长可以由表面化学来控制，从而调节分子与衬底的相互作用。此外，表面的氧重建，表明了有机分子采用给定的表面波纹的灵活性，以及它们通过倾斜释放应力的独特可能性。
Controlling the molecular growth of organic semiconductors is an important issue to optimize the performance of organic devices. Conjugated molecules, used as building blocks, have an anisotropic shape and also anisotropic physical properties like char e transport or luminescence. The main challenge is to grow highly crystalline layers with molecules of defined orientation. The higher the crystallinity, the closer these properties reach their full intrinsic potential, while the orientation determines the physical properties of the film. Herein we show that the molecular orientation and growth can be steered by the surface chemistry, which tunes the molecule-substrate interaction. In addition, the oxygen reconstruction of the surface, demonstrates the flexibility of the organic molecules to adopt a given surface corrugation and their unique possibility to release stress by tilting.