期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 7, 页码 6491-6497出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b17368
关键词
charge injection; barrier; spectroscopy; conjugated polymer; organic electronics
资金
- National Science Foundation of China [11604099]
- ECNU Team Building grant
- Fundamental Research Funds for the Central Universities
- Swedish Foundation for Strategic Research [SE13-0060]
- Swedish Research Council [2016-05498]
- Goran Gustafsson Foundation for Research in Nature Sciences and Medicine
- Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009 00971]
The energy offset between the electrode Fermi level and organic semiconductor transport levels is a key parameter controlling the charge injection barrier and hence efficiency of organic electronic devices. Here, we systematically explore the effect of in situ oxygen exposure on energetics in n-type conjugated polymer P(NDI2OD-T2) films. The analysis reveals that an interfacial potential step is introduced for a series of P(NDI2OD-T2) electrode contacts, causing a nearly constant downshift of the vacuum level, while the ionization energies versus vacuum level remain constant. These findings are attributed to the establishment of a so-called double-dipole step via motion of charged molecules and will modify the charge injection barriers at electrode contact. We further demonstrate that the same behavior occurs when oxygen interacts with p-type polymer TQ1 films, indicating it is possible to be a universal effect for organic semiconductOrs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据