Adsorption of Perylene on Si(111)(7 × 7)**Supported by the National Natural Science Foundation of China under Grant Nos. U1632102, 11521404, 11634009, 11674222, 11674226, 11790313, 11574202, 11874256, 11861161003 and 11874258, the National Key Research and Development Program of China (Grant Nos. 2016YFA0300403 and 2016YFA0301003); in part by the Key Research Program of the Chinese Academy of Science (Grant No. XDPB082), and

Abstract

We investigate the adsorption of organic molecular semiconductor perylene on (7 × 7) reconstructed Si(111) surface by ultraviolet photoemission spectroscopy. It is observed that seven features that derive from the organic material are located at 0.71, 2.24, 4.0, 5.9, 7.46, 8.65 and 9.95 eV in binding energy. The theoretical calculation results reveal the most stable adsorption geometry of organic molecule perylene on Si(111) (7 × 7) substrates is at the beginning of deposition.