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 (C)</p> Signup and view all the answers

    Qual de le sequente es un caracteristic de le silicon?

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

    Quantos electrones de valencia ha un impuritate trivalente?

    <p>3 (C)</p> Signup and view all the answers

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

    <p>6 (A), 4 (D)</p> Signup and view all the answers

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

    <p>3 (A)</p> Signup and view all the answers

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

    <p>3 (A)</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 (B), 6 (C), 5 (D)</p> Signup and view all the answers

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

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

    Como es definite un hole in un semiconductor?

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

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

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

    Qual es un caracteristica de holes in semiconductors?

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

    Le interaction inter un hole e un electron resulta in:

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

    Como hole e electron interacta?

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

    Qual de iste es un tipo de electrones in semiconductors?

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

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

    <p>Illos convergit (B)</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 (C)</p> Signup and view all the answers

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

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

    Que resulta del addition de impuritate pentavalente in un semiconductor?

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

    Como se describe un impuritate pentavalente?

    <p>Un atom con quin electrones de valencia (A)</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 (B)</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 (C)</p> Signup and view all the answers

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

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

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

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

    Quid non descrive un semiconductor intrinseco a temperatura ambiente?

    <p>Multos electrones libere (C)</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 (A)</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 (B)</p> Signup and view all the answers

    Quid non es un caracteristica de un semiconductor intrinseco?

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

    Flashcards

    Semiconductor

    Un semiconductor es un material con un conductivitate electric intermedie inter un conductor e un isolator.

    Electronic de Valence

    Le electronic de valence es le electronic in le orbital externe de un atomo, que participa in le formation de ligamines chimic.

    Quante Electronic de Valence ha un Semiconductor?

    Un semiconductor typicamente ha 4 electronic de valence. Iste electronic es importante in le formation de ligamines chimic in le material.

    Atomo trivalente

    Un atomo con tres electronic de valence.

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    Impureza trivalente

    Un impureza trivalente es un atomo con tres electronic de valence. Quando illo es additte a un semiconductor, illo crea un

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    Impuritate pentavalent

    Un atomo con cinque electrones in su strato de valence. Exemplos include arsenio (As), antimonio (Sb), e phosphoro (P).

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    Semiconductor de typo N

    Un semiconductor con un impuritate pentavalent. Il ha un excesso de electrones libere, rendente le material un semiconductor de typo N.

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    Tubo

    Un vacantia in le strato de valence de un atomo, agite como un portador de carga positive. Formate quando un electrone se move de su position.

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    Semiconductor de typo P

    Un semiconductor con un impuritate trivalent. Il ha un excesso de tubos, rendente le material un semiconductor de typo P.

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    Impuritate trivalent

    Un atomo con tres electrones in su strato de valence. Exemplos include boro (B), aluminium (Al), e gallium (Ga).

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    Un buco in un semiconductor

    Un vacancia in le strato de conduction de un semiconductor, que se comporta como si illo es un particula positivemente cargate.

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    Un electronic libere

    Un electronic que es libere de mover se in le strato de conduction de un material.

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    Un electronic ligat

    Un electronic que es ligat a un atomo e non participa in le conduction electric.

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    Un electronic de valence

    Le electronic in le strato de valence de un atomo, que participa in le formation de un ligamine chimic.

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    Valentia

    Le numero de electronic de valence in un atomo.

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    Attraction inter Electron e Lacun

    Un par de electrones e un lacun in un semiconductor tende a attraher se mutuo. Isto es debite al facto que un lacun es un vacantia in le strato de valence, e le electron negative tenta plenar iste vacantia. Le attraction inter illos es simile al attraction inter un proton e un electron.

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    Impureza Pentavalente

    Un atomo con cinque electrones in su strato de valence. Quando iste atomo es additte a un semiconductor, illo crea un semiconductor de typo N.

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    Quid es un semiconductor intrinsic?

    Un semiconductor intrinsic es un material que ha un numero equal de electrones libere e tubos a temperatura ambiente. Iste material es normalmente un insulator, ma su conductivitate aumenta con le temperatura.

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    Quante electrones libere e tubos es presente in un semiconductor intrinsic a temperatura ambiente?

    A temperatura ambiente, un semiconductor intrinsic ha un pauc electrones libere e tubos. Le conductivitate de iste material es basse, ma non nulle.

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    Quid es un semiconductor de typo N?

    Un semiconductor de typo N es create quando un semiconductor intrinsic es dopate con un impureza pentavalent. Un impureza pentavalent ha cinque electrones in su strato de valence. Le electrones additional crea un excesso de electrones libere in le material, donante le un conductivitate negative.

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    Quid es un semiconductor de typo P?

    Un semiconductor de typo P es create quando un semiconductor intrinsic es dopate con un impureza trivalent. Un impureza trivalent ha tres electrones in su strato de valence. Le falta de un electrone crea un tubo in le material, donante le un conductivitate positive.

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    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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    Semiconductor Physics Model Answers PDF - ELE 222, Spring 2024 - 2025

    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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