Electrical, optical and morphological properties of nanoparticle indium-tin-oxide layers

被引：54

作者：

Gross, Michael ^{[1
]}

Winnacker, Albrecht ^{[1
]}

Wellmann, Peter J. ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Dept Mat Sci 6, D-91058 Erlangen, Germany

来源：

THIN SOLID FILMS | 2007年 / 515卷 / 24期

关键词：

indium-tin-oxide; ITO; nanoparticle; conductance; transmittance; porosity; transport; cluster;

D O I：

10.1016/j.tsf.2007.03.136

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Porous layers were prepared from DEGUSSA's ITO (In2O3:Sn) nanoparticle dispersion by doctor blading followed by annealing in air. We investigated the influence of various annealing parameters on electrical, optical and morphological thin film properties. Conductance rises with increasing annealing temperature and time by more than three orders of magnitude up to 44 Omega(-1) cm(-1). Besides this we found an abrupt decrease in free charge carrier concentration above a critical annealing temperature of 250 degrees C, which leads to a step in conductance curve. In spite of particle growing during annealing no decrease in porosity was observed and in opposite to compact material, nanoparticle layers do not exhibit an appreciable shrinkage below recrystallisation temperature. These both indicate a densification hindering particle pinning effect, which is believed to be currently the main obstruction to achieve higher electrical conductivities. (c) 2007 Elsevier B.V All rights reserved.

引用

页码：8567 / 8572

页数：6

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