Simple synthesis of ultra-high quality In2S3 thin films on InAs substrates
Extremely high-quality tetragonal β-In2S3 thin films firmly remained on the InAs substrate for the first time.
New growth technique for high quality In2S3 crystals by adopting simple thermal sulfurization of InAs substrates.
In2S3 crystals are of remarkable crystal quality.
We report a simple and reliable technique to synthesize high-quality In2S3 films on InAs substrates by using thermal sulfurization in a hot-wall tube furnace. X-ray diffraction and energy dispersive X-ray spectroscopy data confirmed that the synthesized films were cubic β-In2S3 or tetragonal β-In2S3, depending on growth conditions. Field emission scanning electron microscopy analysis and Raman spectroscopy showed that the In2S3 films are of remarkable crystal quality. Especially, by optimizing the growth conditions, we have grown an extremely high-quality tetragonal β-In2S3 thin film firmly remained on the InAs substrate, for the first time.