Improvement of particle size of indium tin oxide nanoparticles by in-situ dispersion method for solution based transparent heater
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- 作者：Sung-Jei Hong ; Seung-Jae Cha ; Jae-Yong Lee ; Young-Sung Kim
- 关键词：ITO nanoparticles ; In ; situ dispersion method ; polyvinylpyrrolidone ; particle size ; transparent heater ; electrical sheet resistance ; optical transmittance ; heating properties ; low power
- 刊名：Electronic Materials Letters
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：13
- 期：1
- 页码：37-44
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Optical and Electronic Materials; Condensed Matter Physics; Nanotechnology and Microengineering; Characterization and Evaluation of Materials; Nanotechnology;
- 出版者：The Korean Institute of Metals and Materials
- ISSN：2093-6788
- 卷排序：13
文摘
In this study, particles size of indium tin oxide nanoparticles (ITO-NPs) was improved by in-situ dispersion method. Polyvinylpyrrolidone (PVP) was used as dispersing agent, and reduced precipitates heat-treated at 400 °C. Brunauer, Emmett & Teller (BET) specific surface area (SSA) analysis and X-ray diffractometer (XRD) observations found that their particle size was improved by using the in-situ dispersion. In addition, we found that the particle size of the crystalline ITO-NPs was changed with the concentration of the PVP as well as the heat-treatment temperature. When 2 wt% PVP was applied, the highest BET SSA of the ITO-NPs, 114.7 m2/g, was obtained after heat-treatment at 400 °C. In fact, the lowest sized, less than 7 nm, ITO-NPs was observed with high resolution transmission electron microscope (HRTEM). The ITO-NPs were well dispersed in the solvent to formulate a 20 wt% ITO-NPs solution. ITO-NPs coated layer on 3 × 3 cm2 quartz substrate showed sheet resistance of 319 Ω/□ and optical transmittance of 89.5% after heat-treatment at 900 °C. Heat was well generated at the ITO-NPs coated layer with supplied voltage. Also, temperature of above 150 °C was obtained from the transparent heater, and 89 °C was obtained with low power, 0.21 W/cm2, that is superior to commercial heaters.