Geometric and electronic structure of templated C60 on diindenoperylene thin films
Geometric and electronic structure of templated C60 on diindenoperylene thin films
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DOI：
10.1021/jp3106056
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发表时间：
2013-01
影响因子：
3.7
通讯作者：
A. Hinderhofer;A. Gerlach;K. Broch;T. Hosokai;K. Yonezawa;Kengo Kato;S. Kera;N. Ueno;F. Schreiber
中科院分区：
文献类型：
--
作者：
A. Hinderhofer;A. Gerlach;K. Broch;T. Hosokai;K. Yonezawa;Kengo Kato;S. Kera;N. Ueno;F. Schreiber
通过在C60和SiO2衬底之间插入DIP模板层，C60薄膜的结构有序性得到了显著改善。与在SiO2等非晶衬底上生长相比，在DIP上生长的C60显示出与衬底平行的（111）平面上的fcc畴对齐，并且相干平面内岛尺寸显着增加了约4倍。DIP底层结构质量的改变导致C60顶层结构顺序的改变。此外，还讨论了模板化和非模板化C60薄膜的紫外光电子能谱数据。与其他各向异性有机分子相比，C60的最高占据分子轨道区域的光谱展宽和态密度与C60薄膜的结构顺序无关，这可以通过C60分子的各向同性形状来解释。
The structural order of C60 thin films is shown to be significantly improved by inserting a templating layer of diindenoperylene (DIP) between the SiO2 substrate and C60. In contrast to growth on an amorphous substrate like SiO2, C60 grown on DIP exhibits alignment of fcc-domains with the (111) plane parallel to the substrate and a significant increase of the coherent in-plane island size by a factor of ∼4. Modification of the structural quality of the DIP bottom layer leads to a change in structural order in the C60 top layer. In addition, ultraviolet photoelectron spectroscopy data from templated and nontemplated C60 films are discussed. In contrast to other anisotropic organic molecules, for C60 the spectral broadening and density of states of the highest occupied molecular orbital region do not depend significantly on the structural order in the C60 film, which can be rationalized by the isotropic shape of the C60 molecule.