4. Fowler-Nordheim equation is given by J(F)= = 6.2 10-6EF F exp (V+EF)V -6.8 x 107....

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4. Fowler-Nordheim equation is given by J(F)= = 6.2 10-6EF F exp (V+EF)V -6.8 x 107. 43 F (a) Give the name of the display related to the equation. Why emitters in this type of display should be sharp at low voltage? (5 marks) (b) Give one example of common metal-ion doped phosphors in the display of part (a) for achieving red, green and blue color emissions, respectively. (5 marks) 4. Fowler-Nordheim equation is given by J(F)= = 6.2 10-6EF F exp (V+EF)V -6.8 x 107. 43 F (a) Give the name of the display related to the equation. Why emitters in this type of display should be sharp at low voltage? (5 marks) (b) Give one example of common metal-ion doped phosphors in the display of part (a) for achieving red, green and blue color emissions, respectively. (5 marks)