EEGR 215 Electron Affinity Work Function - Electrical Engineering Questions

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EEGR 215

Define all terms in your own words 

-Electron Affinity vs Work Function
-Ohmic Contact
-Schottky contact

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EEGR 215, Spring 2019 Topic 6 Terms: Define all terms in your own words 1. Electron Affinity vs Work Function 2. Ohmic Contact 3. Schottky Contact 4. Rectifying Contact 5. Tunneling Contact 6. Debye Length and Depletion Width 7. Forward Bias vs Reverse Bias 8. Metal-Oxide-Semiconductor Contact 9. 2 Dimensional Electron Gas (2DEG) Homework: Write neatly and answer all parts of the questions. C. C. 1. Why does a 2DEG allow for a higher local conductivity? 2. Design a Schottky Contact with N-type Silicon a. Identify a metal that forms a Schottky Contact at ias b. Sketch the Band-bending diagram a OV bias Sketch the Band-bending diagram for Forward Bias and Reverse Bias, label the polarity of bias. 3. Design an Ohmic Contact with P-type Germanium a. Identify a metal that forms an Ohmic Contact at OV bias b. Sketch the Band-bending diagram a OV bias Sketch the Band-bending diagram for Forward Bias and Reverse Bias, label the polarity of bias. 4. Design a Schottky Contact with P-type Gallium Arsenide a. Identify a metal that forms a Schottky Contact at OV bias b. Sketch the Band-bending diagram a OV bias Sketch the Band-bending diagram for Forward Bias and Reverse Bias, label the polarity of bias. 5. For the following Metal-Semiconductor Contacts, calculate the built-in bias and depletion width, and identify the type of contact. Assume OV bias. a. Pt - Silicon (Na = 1e13, Nd = 1e3) b. Ti – Silicon (Nd = 1e16, Na = 1e2) Cu – Silicon (Nd = 1e20, Na = 1e3) 6. Sketch a Cross-Section of the following junctions, label the charge of the depletion region and polarity of forward bias. Choose the proper semiconductor and metal for each junction. a. N-type Tunnel MS Junction b. P-type Tunnel MS Junction PN homojunction d. N-type Ohmic MS Junction e. P-type Schottky MS Junction C. C. C.
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Electrical Engineering
Defining terms
1. Electron Affinity vs Work Function- Electron affinity is the energy required to take out
an electron from the valence to conduction band in semiconductors while work force is
the energy required to an electron up the Fermi levels in metals.
2. Ohmic Contact- It is a low r...


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