homework 2 solutions

A si sio2 e0 e0 empty cb empty cb eg 90 ev eg 112

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Unformatted text preview: it is not transparent to 632 nm light. A) Si SiO2 E=0 E=0 Empty CB Empty CB Eg = 9.0 eV Eg = 1.12 eV Filled VB Filled VB B) For SiO2 layer, Thus, 520 nm light can be transmitted by SiO2 layer. For Si substrate, 520 nm light can not pass through. SiO2 Transparent Si Opaque . 5. 3.3 Show for the body-centered cubic crystal structure that the unit cell edge length a and the atomic radius R are related through a =4R/ . Solution Consider the BCC unit cell shown below Using the triangle NOP And then for triangle NPQ, But or = 4R, R being the...
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This note was uploaded on 01/27/2014 for the course ENG E344 taught by Professor Matthewr.libera during the Fall '12 term at Stevens.

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