14. Assuming in an unknown one-dimensional crystal lattice with the lattice constant a = 5 nm, the Ec(k) near the bottom

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14 Assuming In An Unknown One Dimensional Crystal Lattice With The Lattice Constant A 5 Nm The Ec K Near The Bottom 1 (27.42 KiB) Viewed 64 times

14. Assuming in an unknown one-dimensional crystal lattice with the lattice constant a = 5 nm, the Ec(k) near the bottom of the conduction band and E,(k) near the top of the valence band are -k 3ħ- konkk; 789#k Ec(k) nk tekk E-(k)= where m, =9.1x10" kg is the 4m 10m 700m m. m rest electron mass, k = 27/a. Try to find out the band gap value of this semiconductor, is it a direct or indirect band-gap semiconductor? (15 points)