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Electronic structure of hybrid interfaces of poly(9,9-dioctylfluorene)

机译:聚(9,9-二辛基芴)杂化界面的电子结构

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In this Letter we report the results of a study of the energy level alignment at interfaces between ultra-thin films of poly(9,9-dioctylfluorene) and AlxOy SiO2 or gold substrates, prepared under ambient (air) conditions. In all the cases, vacuum level alignment occurs, and the work function tracks that of the substrates. There is no evidence of band bending in the pristine polymer layers up to 1100 Angstrom in film thickness. Upon increasing the electrical conductivity of the polymer films by continuous doping with sodium under ultra-high-vacuum conditions, the energy levels of the polymer film gradually shift towards higher binding energies and finally become substrate independent. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 21]
机译:在这封信中,我们报告了在环境(空气)条件下制备的聚(9,9-二辛基芴)超薄膜与AlxOy SiO2或金基底之间的界面处能级对准的研究结果。在所有情况下,都会发生真空水平对准,并且功函数会跟踪基板的真空水平。没有证据表明原始聚合物层的膜厚度高达1100埃时带弯曲。通过在超高真空条件下连续掺杂钠来增加聚合物膜的电导率后,聚合物膜的能级逐渐向更高的结合能转移,并最终变得与基底无关。 (C)2000 Elsevier Science B.V.保留所有权利。 [参考:21]

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