Electromagnetic absorption in transparent conducting films

摘要

The electromagnetic absorption in indium tin oxide (ITO) films of high carrier density was investigated using Drude model. The effects of finite skin depth, due to free electron absorption, for the transparency of current spreading layers for light emitting diode (LED) applications was also investigated. It was observed that the skin depth above the plasma frequency was proportional to electron mobility. The results show that the increase in electron mobility has increased the optical transparency of an ITO film and the optical output power of a LED when using ITO as its current spreading layer.