期刊
APPLIED SURFACE SCIENCE
卷 396, 期 -, 页码 912-919出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2016.11.060
关键词
Printed electronics; Indium oxide; Nanoparticle X-ray photoelectron spectroscopy (XPS); Semiconductor; Agglomeration
类别
资金
- Helmholtz Association through Virtual Institute [VI-530]
- Ministry of Research and Education of the German State of Baden-Wurttemberg
One of the major challenges in flexible electronics industry is the fabrication of high-mobility field-effect transistors ( FETs) at ambient conditions and on inexpensive polymer substrates compatible with roll-to-roll printing technology. In this context, a novel and general route towards room-temperature fabrication of printed FETs with remarkably high field-effect mobility ( mu(FET)) above 12 cm(2)/Vs has recently been developed. A detailed understanding of the chemical structure of the involved nanoparticle ( NP) thin films, prepared by chemical flocculation, is essential for further optimization of the charge transport properties of such devices. In this study, we thus analyze indium oxide NP thin films with and without NaCl additive using x-ray photoelectron spectroscopy ( XPS) and atomic force microscopy ( AFM). It is demonstrated that the introduction of a sodium chloride additive to the ink leads to a strongly altered film morphology and a modification of the NP shell. The results suggest that, as a consequence of the additive, the charge-transport barriers between individual indium oxide NPs are lowered, facilitating long-range charge percolation paths despite the presence of a significant concentration of carbonaceous residues. (C) 2016 Elsevier B. V. All rights reserved.
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