Photoelectron Spectroscopy on Polycyclic Hydrocarbon–F6TCNNQ Interfaces,The Journal of Physical Chemistry C

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Photoelectron Spectroscopy on Polycyclic Hydrocarbon–F6TCNNQ Interfaces
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2020-01-23 , DOI: 10.1021/acs.jpcc.9b08409
Martin Hantusch ₁ , Robert Kuhrt ₁ , Martin Knupfer ₁

Affiliation

The organic heterojunction between polycyclic hydrocarbons [pentacene, dibenzo[a,l]pentacene (DBP)] and hexafluorotetracyanonaphthoquinodimethane (F₆TCNNQ) was investigated by photoelectron spectroscopy. The heterojunction consisted of thin films prepared by a stepwise evaporation process. As a result, a charge-transfer interface is formed, where both polycyclic hydrocarbons acted as electron donors and F₆TCNNQ acted as an electron acceptor. This charge transfer was determined as a localized charge transfer with an ionic character because the F₆TCNNQ anion was observed in the characteristic nitrogen and carbon core levels and the valence-level data showed insulating/semiconducting behavior. The additional benzene rings in DBP lead to a stronger pronunciation of the F₆TCNNQ anion characteristics in the heterojunction compared to that in the pentacene heterojunction because of a different interface morphology.

中文翻译：

多环烃–F ₆ TCNNQ接口上的光电子能谱

通过光电子能谱研究了多环烃[并五苯，二苯并[ a，l ]并五苯（DBP）]和六氟四氰基萘并邻醌二甲烷（F ₆ TCNNQ）之间的有机杂结。异质结由通过逐步蒸发工艺制备的薄膜组成。结果，形成电荷转移界面，其中两个多环烃都充当电子给体，而F ₆ TCNNQ充当电子受体。该电荷转移被确定为具有离子特性的局部电荷转移，因为F ₆在特征氮和碳核能级中观察到TCNNQ阴离子，化合价级数据显示出绝缘/半导体行为。DBP中额外的苯环与并五苯异质结中的F ₆ TCNNQ阴离子特征相比，由于界面形态不同，导致其F ₆ TCNNQ阴离子特性的发音更强。

更新日期：2020-01-23

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