Optimizing oxygen vacancy defects and structural order in thin-film indium gallium zinc oxide transistors could fix persistent display instability

https://www.eurekalert.org/news-releases/1090380

"prolonged exposure to light/ electrical stress shifts voltage required to activate pixels... crystallinity impacts subgap states/ anisotropic electrical conductivity of single-crystal indium gallium zinc oxide... no subgap states near valence band in either as-grown or annealed crystals, whereas such states, linked to device instability, frequently observed in amorphous crystals... use optimum annealing conditions in sample growing or identify better sister material... smartphones, TVs, flexible electronics"