Doped metal oxide semiconductors and thin film transistors and their applications

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The present application discloses a doped metal oxide semiconductor which is an indium tin oxide or indium tin zinc oxide semiconductor doped with a rare earth oxide. Even at a small doping amount, the oxygen vacancies could be suppressed as well as the mobility be maintained; critically, the thin-films made thereof can avoid the influence of light on I-V characteristics and stability, which results in great improvement of the stability under illumination of metal oxide semiconductor devices. The present application also discloses the thin-film transistors made thereof the doped metal oxide semiconductor and its application.