| 초록 |
Transparent conducting oxide (TCO) has been employed in various device industries such as liquid crystal display (LCD), touch panel, organic light emitting diode (OLED), and solar cells. One of the most popular materials for TCO is so far indium tin oxide (ITO), which has low sheet resistance and high optical transmittances when it has crystalline structure. The main obstacle of obtaining crystalline ITO on polyethylene terephthalate (PET) film is high crystallization temperature around 250 °C, at which the PET film cannot withstand. In addition, crystalline ITO is mechanically brittle, which makes it difficult to apply flexible devices. In this study, to overcome the limitations of applying PET film as an ITO film support, single layer graphene was employed as a platform for ITO crystallization. The atomically thin graphene film acts as a mechanically and thermally robust support. The crystallized ITO (c-ITO)/graphene/PET electrode was successfully prepared with reasonable sheet resistance of around 45 Ω/sq. and high transmittance of about 90% at 550 nm wavelength. Characteristics of ITO/graphene hybrid film were measured using UV-vis-NIR spectrophotometer, four-point probe, scanning electron microscope, energy dispersive X-ray spectrometer, raman spectroscopy, HR-TEM. |
