Semiconductor Materials Quiz for CoE 125
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Questions and Answers

What is the classification of a material whose conductivity lies between that of conductors and insulators?

  • Superconductor
  • Insulator
  • Conductor
  • Semiconductor (correct)
  • What type of compound semiconductor can be formed by combining an element from group III and an element from group V?

  • Ternary compound
  • Pentinary compound
  • Quaternary compound
  • Binary compound (correct)
  • What is the main advantage of compound semiconductor materials over elemental semiconductor materials?

  • Higher power
  • Higher frequency
  • Better optical features
  • All of the above (correct)
  • What is the fraction of the element's atomic concentration in a ternary compound semiconductor, Alx Ga1-x As?

    <p>0 ≤ x ≤ 1</p> Signup and view all the answers

    Which of the following elements can be used to form an elemental semiconductor material?

    <p>Si and Ge</p> Signup and view all the answers

    What happens to valence electrons at temperatures greater than 0 K?

    <p>They gain enough thermal energy to break the covalent bond and jump to the conduction band</p> Signup and view all the answers

    What is the term for the +ve charge empty state created in the valence band when a valence electron jumps to the conduction band?

    <p>Hole</p> Signup and view all the answers

    What is the characteristic of an intrinsic semiconductor?

    <p>It has no impurity atoms</p> Signup and view all the answers

    What is the relationship between the number of electrons in the conduction band and the number of holes in the valence band in an intrinsic semiconductor?

    <p>The number of electrons equals the number of holes</p> Signup and view all the answers

    What is the unit of the coefficient B in the intrinsic carrier concentration equation?

    <p>cm^3 K^3/2</p> Signup and view all the answers

    What is the symbol for the intrinsic carrier concentration in an intrinsic semiconductor?

    <p>ni</p> Signup and view all the answers

    What is the number of quantum states in the valence band and conduction band in a semiconductor?

    <p>4N</p> Signup and view all the answers

    What is the difference between the lower energy of the conduction band and the upper energy of the valence band called?

    <p>Eg</p> Signup and view all the answers

    What is the state of the 4N states in the valence band at 0 K?

    <p>Completely filled</p> Signup and view all the answers

    What type of bonding does Si form with another 4 Si atoms?

    <p>Covalent bond</p> Signup and view all the answers

    In an isolated Si atom, how many electrons are tightly bound to the nucleus?

    <p>10</p> Signup and view all the answers

    What is the result of the interaction of electrons in the n = 2 shell when atoms get closer?

    <p>Energy level splits</p> Signup and view all the answers

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