Array substrate, display panel and display device

An array substrate, comprising:

• a base substrate;
• a thin film transistor layer on the base substrate;
• a first passivation layer on a side of the thin film transistor layer away from the base substrate;
• a quantum dot layer on a side of the first passivation layer away from the base substrate and in a display region of the array substrate;
• a color filter layer on a side of the quantum dot layer away from the base substrate, wherein an orthographic projection of the quantum dot layer on the base substrate is within an orthographic projection of the color filter layer on the base substrate;
• a planarization layer on a side of the first passivation layer away from the base substrate and on a side of the color filter layer away from the base substrate;
• and
• a metal grid polarizing layer on a side of the planarization layer away from the base substrate.