Proprietates de Semiconductores
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Questions and Answers

Un semiconductor generalmente ha ……………… electrones de valencia.

  • 6
  • 3
  • 2
  • 4 (correct)

    • Qual de le sequente materiales es normalemente considerate un semiconductor?

  • Platinum
  • Silicon (correct)
  • Argento
  • Oro

    • Un semiconductor in general non ha ……………… electrones de valencia.

  • 2
  • 6
  • 4 (correct)
  • 8

    • Qual es le proprietate principale de un semiconductor?

    <p>Conductores de electricitate in ombre</p> Signup and view all the answers

    Qual de le sequente es un caracteristic de le silicon?

    <p>E' un semiconductor</p> Signup and view all the answers

    Quantos electrones de valencia ha un impuritate trivalente?

    <p>3</p> Signup and view all the answers

    Qual electrones de valencia non es associat con un impuritate trivalente?

    <p>6</p> Signup and view all the answers

    Qual es le quantitá de electrones de valencia assosciate con un impuritate trivalente?

    <p>3</p> Signup and view all the answers

    Un impuritate trivalente addera quantos electrones de valencia a un material?

    <p>3</p> Signup and view all the answers

    Le quales de le sequente valores es un numero incorrecte de electrones de valencia pro un impuritate trivalente?

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

    Que occurre inter un hole e un electron in proximo contacto?

    <p>Illos se attrahen</p> Signup and view all the answers

    Como es definite un hole in un semiconductor?

    <p>Un posición vacante causate per un electrón liberate</p> Signup and view all the answers

    Quo resulta quando un hole e un electron sunt in proximo contact?

    <p>Illos annulla lor effecte</p> Signup and view all the answers

    Qual es un caracteristica de holes in semiconductors?

    <p>Ili es particles positivate</p> Signup and view all the answers

    Le interaction inter un hole e un electron resulta in:

    <p>Un aumento de energia</p> Signup and view all the answers

    Como hole e electron interacta?

    <p>Illos se attrahen</p> Signup and view all the answers

    Qual de iste es un tipo de electrones in semiconductors?

    <p>Electrones libre</p> Signup and view all the answers

    In un campo electric, como hole e electron se comporta?

    <p>Illos convergit</p> Signup and view all the answers

    Qual de iste describe le relation entre holes e electrons in un semiconductor?

    <p>Holes melhora le flux de electrons</p> Signup and view all the answers

    Qual es le resultato direct de le presenza de holes in un semiconductor?

    <p>Improved electrical conductivity</p> Signup and view all the answers

    Que resulta del addition de impuritate pentavalente in un semiconductor?

    <p>Electrones libere</p> Signup and view all the answers

    Como se describe un impuritate pentavalente?

    <p>Un atom con quin electrones de valencia</p> Signup and view all the answers

    Que ocurre con los holes cuando se añade un impuritate pentavalente a un semiconductor?

    <p>I holes aumente</p> Signup and view all the answers

    Qual es le effecto de impuritates pentavalente in le estructura de un semiconductor?

    <p>Incremente le conduction del semiconductor</p> Signup and view all the answers

    In un semiconductor, le addition de impuritate pentavalente principalmente crea:

    <p>Electrones libere</p> Signup and view all the answers

    Quo es le proprietate de un semiconductor intrinseco a temperatura ambiente?

    <p>Pocos electrones libere e holes</p> Signup and view all the answers

    Quid non descrive un semiconductor intrinseco a temperatura ambiente?

    <p>Multos electrones libere</p> Signup and view all the answers

    In le context de semicondutores, quid significa 'holes'?

    <p>Puntos vacuos que occurre in le struttura de electrones</p> Signup and view all the answers

    Quo es le consequence de un aumento in temperatura pro un semiconductor intrinseco?

    <p>Augmenter le quantitá de electrones libere e holes</p> Signup and view all the answers

    Quid non es un caracteristica de un semiconductor intrinseco?

    <p>Le ausencia de holes</p> Signup and view all the answers

    Study Notes

    Semiconductor Properties

    • Semiconductor Formation: Covalent bonds form semiconductors.
    • Temperature Coefficient of Resistance: Semiconductors exhibit a negative temperature coefficient of resistance.
    • Common Semiconductor: Silicon is the most commonly used semiconductor.
    • Valence Electrons: Semiconductors typically have 4 valence electrons.

    Resistivity of Semiconductors

    • Germanium Resistivity: Pure germanium's resistivity at standard conditions is approximately 6 x 10-4 Ω cm.
    • Silicon Resistivity: Pure silicon's resistivity is roughly 6000 Ω cm.
    • Resistance Change with Heat: Semiconductor resistance increases when heated.
    • Semiconductor Crystal Strength: Electron-pair bonds provide the strength of semiconductor crystals.

    Impurity Effects

    • Pentavalent Impurity Addition: Adding pentavalent impurities creates n-type semiconductors, increasing free electrons.
    • Trivalent Impurity Addition: Adding trivalent impurities creates p-type semiconductors, increasing holes.
    • Hole Definition: A hole in a semiconductor is the absence of an electron.
    • Doping Effect on Resistance: Increasing doping decreases resistance.
    • Electron-Hole Interaction: Holes and free electrons tend to attract each other.

    Semiconductor Current

    • Current Conduction Mechanisms: Semiconductor current conduction is primarily due to both holes and free electrons.
    • Forward Bias: When a pn junction is forward biased, the depletion zone narrows.
    • Reverse Bias: A reverse bias widens the depletion layer in a pn junction.

    Diode Behavior

    • Pn Junction Diode Resistance: Forward biased pn junction diodes have low resistance (order of µΩ).
    • Forward Bias Connections: The positive (+) terminal of the battery is connected to the p-side of the diode, while the negative (-) terminal is connected to the n-side for forward bias.
    • Reverse Bias Resistance: A reverse biased diode is an insulator.
    • Barrier Voltage: Germanium junctions have a barrier voltage of approximately 0.3V. Silicon junctions have approximately 0.7 V.

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    Description

    Este quiz examina le proprietates e resistivitate de semiconductores. Discurre de formation, coefficiente de temperatura, et le effectos de impuritates in semiconductores. Testa tu cognoscentia sur elementos como silicio e germanio.

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