A green phosphor and display device

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A display device comprising at least one phosphor layer, the phosphor layer containing a green phosphor represented by the following formula : (A 1-x B x ) (Zn 1-y Mn y ) Al 10 O 17 wherein, A is an element selected from Ca, Ba and Sr, B is a rare-earth element, x is a number satisfying 0.0001 ‰ x ‰ 0.1, and y is a number satisfying 0.02 ‰ y ‰ 0.14.