| Interfacial electronic structure at a metal–phthalocyanine/graphene interface:Copper–phthalocyanine versus iron–phthalocyanine |
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| 引用本文： | 叶伟国,刘丹,彭啸峰,窦卫东.Interfacial electronic structure at a metal–phthalocyanine/graphene interface:Copper–phthalocyanine versus iron–phthalocyanine[J].中国物理 B,2013,22(11):117301-117301. |
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| 作者姓名： | 叶伟国 刘丹 彭啸峰 窦卫东 |
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| 作者单位： | Physics Department, Shaoxing University, Shaoxing 312000, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China(Grant No.61106131);the Natural Science Foundation of Zhejiang Province,China(Grant No.Y6110072);the Talents Project of Science and Technology Department of Qianjiang City,China(Grant No.2012R10075);the Postdoctoral Science Foundation of China(Grant No.2012M521119) |
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| 摘 要： | The energy level alignment of CuPc and FePc on single-layer graphene/Ni(111)(SLG/Ni)substrate was investigated by using ultraviolet and X-ray photoelectron spectroscopy(UPS and XPS).The highest occupied molecular orbitals(HOMOs)in a thick layer of CuPc and FePc lie at 1.04 eV and 0.90 eV,respectively,below the Fermi level of the SLG/Ni substrate.Weak adsorbate–substrate interaction leads to negligible interfacial dipole at the CuPc/SLG/Ni interface,while a large interfacial dipole(0.20 eV)was observed in the case of FePc/SLG/Ni interface,due to strong adsorbate–substrate coupling.In addition,a new interfacial electronic feature was observed for the first time in the case of FePc on SLG/Ni substrate.This interfacial state can be attributed to a charge transfer from the SLG/Ni substrate to unoccupied orbitals of FePc.
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| 关 键 词： | interfacial electronic structure metal–phthalocyanine interface graphene workfunction |
| 收稿时间： | 2013-06-20 |
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