轨道能级差
费米能级
联苯
化学
紫外光电子能谱
分子轨道
X射线光电子能谱
电子
原子物理学
电子结构
材料科学
物理
分子
计算化学
核磁共振
有机化学
量子力学
作者
Yong‐Ki Kim,Jeong Won Kim,Yongsup Park
摘要
We have determined the electronic energy level alignment at the interface between 4,4′-bis(N-phenyl-1-naphthylamino)biphenyl (NPB) and 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile (HAT-CN) using ultraviolet photoelectron spectroscopy. The highest occupied molecular orbital (HOMO) of 20 nm thick HAT-CN film was located at 3.8 eV below the Fermi level. Thus the lowest unoccupied molecular orbital (LUMO) is very close to the Fermi level. The HOMO position of NPB was only about 0.3 eV below Fermi level at NPB/HAT-CN interface. This enables an easy excitation of electrons from the NPB HOMO to the HAT-CN LUMO, creating electron-hole pairs across this organic-organic interface.
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