Optoelectronics Devices: Introduction and Applications
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Questions and Answers

What are the limitations of using Si and Ge in optoelectronics?

They have very limited uses due to being indirect Bandgap structures and showing poor light emission and absorption properties.

How can the limitations of elemental semiconductors be overcome in optoelectronics?

By doping them with different group elements to form compounds or alloys.

What are some examples of III-V group compound materials in optoelectronics?

a) GaN, GaP, InSb, b) AlGaAs, InGaP, InGaAs, c) AlGaInP

Give examples of binary form II-VI group compound materials.

<p>ZnS, GdSe, PbTe, ZnO, CdS</p> Signup and view all the answers

What are some techniques used for synthesizing modern semiconducting materials?

<p>Molecular Beam Epitaxy (MBE), Chemical Vapor Deposition (CVD) along with band gap engineering</p> Signup and view all the answers

What types of optoelectronic devices can be fabricated using modern semiconducting materials?

<p>LEDs, LASERs, Solar cells, and Photo-diodes active in Visible, IR, and UV regions</p> Signup and view all the answers

What are the three main interactions of light with optoelectronic devices or semiconducting materials?

<p>a) Reflection (A%) b) Absorption (B%) c) Transmission (C%)</p> Signup and view all the answers

According to the law of conservation of energy, how is the incident light energy distributed in optoelectronic devices?

<p>Incident light energy = Reflected energy (A%) (100%) + Absorbed energy (B%) + Transmitted energy (C%)</p> Signup and view all the answers

What are the excess charge carriers responsible for in semiconducting materials?

<p>Charge carrier generation, i.e., electron-hole pairs</p> Signup and view all the answers

What is optoelectronics?

<p>The branch of science and technology concerned with the combined use of electronics and light.</p> Signup and view all the answers

What is the subfield of optoelectronics?

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

Why are semiconducting materials preferred in optoelectronics?

<p>Due to the variation in their electrical conductivity over orders of magnitude by changing in temperature, optical excitation, and the presence of impurity content in them.</p> Signup and view all the answers

What are the two most common semiconductors studied at an elemental level?

<p>Germanium (Ge) and Silicon (Si)</p> Signup and view all the answers

What are the devices that support the interaction between light and electronics known as?

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

What is the basic working process of optoelectronics?

<p>The optical interaction on the electronic responses in specific optically active semiconducting materials.</p> Signup and view all the answers

What is the basic working process of optoelectronics?

<p>The basic working process of optoelectronics deals with the optical interaction on the electronic responses in specific optically active semiconducting materials.</p> Signup and view all the answers

Why are semiconducting materials preferred in optoelectronics?

<p>Semiconducting materials are preferred in optoelectronics due to their ability to vary electrical conductivity over orders of magnitude by changing in temperature, optical excitation, and the presence of impurity content.</p> Signup and view all the answers

What is the subfield of optoelectronics that includes the generation, transmission, and detection of light?

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

What are the two most common semiconductors studied at an elemental level?

<p>Germanium (Ge) and Silicon (Si)</p> Signup and view all the answers

What are the devices that support the interaction between light and electronics known as?

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

What are some examples of optoelectronic materials from Group-IV of the periodic table?

<p>Germanium (Ge) and Silicon (Si)</p> Signup and view all the answers

What are some examples of quaternary form III-V group compound materials used in optoelectronics?

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

In optoelectronics, what types of light spectrums are covered by semiconducting materials?

<p>Infrared, visible, and ultraviolet regions</p> Signup and view all the answers

What are two modern semiconducting growth techniques used for creating composite compounds or alloys?

<p>Molecular Beam Epitaxy (MBE) and Chemical Vapor Deposition (CVD)</p> Signup and view all the answers

What is the main manifestation in all optoelectronic devices concerning the interaction of light with semiconducting materials?

<p>Interaction of optical radiations or photons with the semiconducting material</p> Signup and view all the answers

According to the law of conservation of energy, how is the incident light energy distributed in optoelectronic devices?

<p>Incident light energy = Reflected energy (A%) (100%) + Absorbed energy (B%) + Transmitted energy (C%)</p> Signup and view all the answers

What is the purpose of band gap engineering in synthesizing modern semiconducting materials?

<p>To create various composite compounds or alloys</p> Signup and view all the answers

What are the three main interactions of light with optoelectronic devices or semiconducting materials?

<p>Reflection, Absorption, Transmission</p> Signup and view all the answers

What are the excess charge carriers responsible for in semiconducting materials?

<p>Charge carrier generation</p> Signup and view all the answers

What are some examples of binary form II-VI group compound materials used in optoelectronics?

<p>ZnS, PbTe, CdS</p> Signup and view all the answers

What is the primary reason for the limited uses of Si and Ge in optoelectronics?

<p>They are indirect Bandgap structures material</p> Signup and view all the answers

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