Multi-color modulation of solid-state display based on thermally induced color changes of indium tin oxide and phase...

A multi-color solid-state display structure has been fabricated and characterized, which is based on phase-change material Ge₂Sb₂Te₅ (GST) and conducting transparent material indium tin oxide (ITO). The significant influence of ITO is investigated by experiments as well as simulations. We found that the ITO layer in fact plays a significant or even a dominate role in the color change of GST-based multi-layer solid state display structure. Multi-color modulation can be achieved by changing the phase state of both ITO and GST. Based on those results, better color presentation can be realized by improving the design of this new solid-state display.