Abstract
In this study, indium-tin-oxide (ITO) nanoparticles were simply recovered from the thin film transistor-liquid crystal display (TFT-LCD) panel scraps by means of lift-off method. This can be done by dissolving color filter (CF) layer which is located between ITO layer and glass substrate. In this way the ITO layer was easily lifted off the glass substrate of the panel scrap without panel crushing. Over 90% of the ITO on the TFT-LCD panel was recovered by using this method. After separating, the ITO was obtained as particle form and their characteristics were investigated. The recovered product appeared as aggregates of particles less than 100 nm in size. The weight ratio of In/Sn is very close to 91/9. XRD analysis showed that the ITO nanoparticles have well crystallized structures with (222) preferred orientation even after recovery. The method described in this paper could be applied to the industrial recovery business for large size LCD scraps from TV easily without crushing the glass substrate.
Highlights
Thin film transistor-liquid crystal display (TFT-LCD) has been used as a most popular flat panel display
Indium has been widely used for transparent conductive oxides (TCO) in the form of indium tin oxide (ITO), because it has unique high optical transparency and electrical conductivity
ITO was taken from a 7 inch size TFT-LCD panel scraps
Summary
Thin film transistor-liquid crystal display (TFT-LCD) has been used as a most popular flat panel display. A new recycling technology was developed to recover ITO nanoparticles from TFT-LCD scraps. Characteristics such as particle size, thermal property, crystal structure, composition ratio, and purity of the recovered ITO product were investigated
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