A thin film transistor and a method for manufacturing the same, an array substrate including the thin film transistor, and an electronic apparatus including the thin film transistor or provided with the array substrate. The thin film transistor includes: a gate electrode, a gate insulating layer, an active layer, and a source electrode and a drain electrode, the active layer is formed of a mixture including a semiconductor nano-material and a photoresist material. The method for manufacturing the thin film transistor includes: preparing a mixture including a semiconductor nano-material and a photoresist material; applying the mixture over a substrate, and forming a patterned active layer by exposure and development.