期刊
THIN SOLID FILMS
卷 517, 期 5, 页码 1624-1629出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2008.09.071
关键词
Indium tin oxide; ITO; Nanoparticles; Dispersion; Stability; Thin films; Morphology; Transmittance; Conductivity
类别
资金
- Deutsche Forschungsgemeinschaft [116111]
Stable suspensions of indium tin oxide nanoparticles were prepared by dispersing for 1 h in ethanol and stabilizing with 2-[2-(2-Methoxyethoxy)ethoxy]acetic acid. Particle size, morphology. and structure were characterized by a combination of dynamic light scattering, high resolution transmission electron microscopy, and X-ray diffraction. Spin coating of the stable suspensions resulted in densely packed films with a high transparency. Dispersing times exceeding 1 h led to a significant overdispersing effect, i.e. an increasing aggregate size of the suspensions was observed. Zeta-potential, pH, and X-ray photoelectron spectroscopy measurements were conducted to achieve a detailed understanding of the effect of overdispersing. With an increasing time of dispersion, i.e. with a decreasing stability of the suspensions, the thin films fabricated by spin coating displayed an increasing pore size distribution and surface roughness. In addition a strong decrease in transmittance and in conductivity was observed. (C) 2008 Elsevier B.V. All rights reserved.
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