Diindenoperylene thin-film structure on MoS2 monolayer
Diindenoperylene thin-film structure on MoS2 monolayer
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DOI：
10.1063/1.5100282
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发表时间：
2019-06
影响因子：
4
通讯作者：
N. Mrkyvkova;M. Hodas;J. Hagara;P. Nádaždy;Y. Halahovets;M. Bodík;K. Tokár;J. Chai;S. J. Wang;D. Chi;A. Chumakov;O. Konovalov;A. Hinderhofer;M. Jergel;E. Majková;P. Šiffalovič;F. Schreiber
中科院分区：
文献类型：
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作者：
N. Mrkyvkova;M. Hodas;J. Hagara;P. Nádaždy;Y. Halahovets;M. Bodík;K. Tokár;J. Chai;S. J. Wang;D. Chi;A. Chumakov;O. Konovalov;A. Hinderhofer;M. Jergel;E. Majková;P. Šiffalovič;F. Schreiber
由于范德华(VDW)相互作用使2D晶体能够与多种材料集成，因此二维(2D)原子晶体的研究是(光电子)领域中进展很快的课题之一。有机π共轭分子为创造所谓的杂化VDW异质结构提供了新的机会，在这种异质结构中，它们的各向异性增加了额外程度的功能可能性。此外，研究还发现，在有机分子的情况下，2D衬底改变了分子的取向，从而提高了整体的光电性能。然而，到目前为止，分子的重新定向一直只在石墨烯底层上进行研究，这限制了其在更广泛的材料中的适用性。在这里，我们研究了棒状有机半导体的代表分子二异丁二烯(DIP)在MoS_2单分子膜上的分子取向。我们的结果表明，DIP在MoS_2单分子膜的顶部形成了独立的岛，分子的取向是平躺的。我们将掠入射X射线衍射技术与原子模拟相结合，揭示了原子薄衬底上的精确分子排列。我们还研究了不同厚度的DIP层的光学吸收光谱，因为它们对于有机基光电子学中的各种应用都是非常重要的。由于范德华(VDW)相互作用使得2D晶体能够与广泛的材料集成，所以二维(2D)原子晶体的研究是(光电子)领域中非常先进的课题之一。有机π共轭分子为创造所谓的杂化VDW异质结构提供了新的机会，在这种异质结构中，它们的各向异性增加了额外程度的功能可能性。此外，研究还发现，在有机分子的情况下，2D衬底改变了分子的取向，从而提高了整体的光电性能。然而，到目前为止，分子的重新定向一直只在石墨烯底层上进行研究，这限制了其在更广泛的材料中的适用性。在这里，我们研究了棒状有机半导体的代表分子二异丁二烯(DIP)在MoS_2单分子膜上的分子取向。结果表明，DIP在MoS_2单分子膜的顶部形成了独立的孤岛，呈平卧取向。
Research on two-dimensional (2D) atomic crystals is one of the highly progressive topics in (opto)electronics, as the van der Waals (vdW) interactions enable integration of 2D crystals with a broad range of materials. Organic π-conjugated molecules offer new opportunities for creating the so-called “hybrid” vdW heterostructures, in which their anisotropy adds an extra degree of functional possibilities. Moreover, it was found that in the case of organic molecules, the 2D substrate changes the molecular orientation, which in turn can enhance the overall optoelectronic properties. However, the reorientation of the molecules has been until now studied solely on the graphene underlayer that restrained its applicability to a broader range of materials. Here, we study the molecular orientation of diindenoperylene (DIP), a representative of rodlike organic semiconductors, on the MoS2 monolayer. Our results show that DIP forms separate islands on the top of the MoS2 monolayer with lying-down orientation of the molecules. We combine the grazing-incidence X-ray diffraction technique with atomistic simulations to reveal the exact molecular arrangement on the atomically thin underlayer. We also investigate optical absorption spectra for different thicknesses of the DIP layer, as they are of fundamental importance for various applications in organic-based optoelectronics.Research on two-dimensional (2D) atomic crystals is one of the highly progressive topics in (opto)electronics, as the van der Waals (vdW) interactions enable integration of 2D crystals with a broad range of materials. Organic π-conjugated molecules offer new opportunities for creating the so-called “hybrid” vdW heterostructures, in which their anisotropy adds an extra degree of functional possibilities. Moreover, it was found that in the case of organic molecules, the 2D substrate changes the molecular orientation, which in turn can enhance the overall optoelectronic properties. However, the reorientation of the molecules has been until now studied solely on the graphene underlayer that restrained its applicability to a broader range of materials. Here, we study the molecular orientation of diindenoperylene (DIP), a representative of rodlike organic semiconductors, on the MoS2 monolayer. Our results show that DIP forms separate islands on the top of the MoS2 monolayer with lying-down orientation of the mo...