#7 (10 pts). Semiconductor nanoparticles: a. What is the color of crystalline Si? We know that the bandgap of Si is 1.12

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7 10 Pts Semiconductor Nanoparticles A What Is The Color Of Crystalline Si We Know That The Bandgap Of Si Is 1 12 1 (37.33 KiB) Viewed 22 times

#7 (10 pts). Semiconductor nanoparticles: a. What is the color of crystalline Si? We know that the bandgap of Si is 1.12 eV. b. What are excitons and exciton Bohr radius? Calculate the exciton Bohr radius in Si. c. When are quantum confinement effects observed in nanocrystallites? Explain and calculate the photon energy in the observation in this picture for nanoparticles with a diameter of 1 nm? Ex = 1.12 eV; m* electron = 1.08; m"hole = 0.57; 8 = 11.7 for Si and Si nano particles; Eo =8.854 x 10"? (F/m); h=6.626 x 1094).s; Melectron= 9.11 x 10 kg; C = 3 x 10 m/s; e = 1.6 x 10"" (C); 1 eV = 1.6 x 10-19]. -34 Various