lab report, Engineering homework help

User Generated

stuw

Engineering

Description

please see the attached

Unformatted Attachment Preview

EEGR  215:  Materials  and  Devices   Lab  3   Instructor:  Dr.  Juan  White   Due  Date:  July 28,  2017   (1)  A  semiconductor  device  is  characterized  by  the  idealized  energy  band  diagram  in  the  figure  below.     It  is  also  known  that  EG  =  1.12eV,  ni  =  1010  cm-­‐3,  and  kT  =  0.0259  eV.    Also,  µn  =  1345  cm2  V-­‐1  -­‐  sec-­‐1  and     µp  =  458  cm2  V-­‐1  -­‐  sec-­‐1  at  both  x  =  xa  and  x  =  xb.   (a)  Using a drawing program, sketch  the  electrostatic  potential  (V)  inside  the  semiconductor  as  a  function   of  x.   Set  V  =  0  at  x  =  xa.   (b)  Using a drawing program, sketch  the  electric  field  (E)  inside  the  semiconductor  as  a  function  of  x. (c)  What  is  the  magnitude  of  the  electron  drift  current  density(JN|drift)  at  x  =  xa?    Explain.   (d)  Is  there  an  electron  drift  velocity  at  x  =  xb?    If  there  is  a  drift  current,  what  is  the  direction  of  the   current  flow?   (e)  Is  there  an  electron  diffusion  current  and  x  =  xb?    If  there  is  a  diffusion  current,  what  is  the   direction  of  the  current  flow?   (f)  What  is  the  magnitude  of  the  total  current  density  (J)  at  x  =  xb?  Explain. (2)  Einstein  relationships  shows  the  relationship  between  the  diffusion  constant  and  the  carrier   mobility  of  a  semiconductor.   (a)  Derive  the  Einstein  relationship  for  holes.    Please  show  each  step  of  your  derivation.   (b)  Under  what  conditions  is  the  Einstein  relationship  valid?  
Purchase answer to see full attachment
User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.

Explanation & Answer

hello, I'm done with your task, all parts are well calculated and explained as per your instructions. In case of any query based on my work, feel free to share with me.

Running head: LAB REPORT

1

Lab Report
Name of Student
Name of Professor
Course Title
Date

LAB REPORT

2

Parameters provided are as shown below:

Calculations and computations
Part A

LAB REPORT

3
Solution

Plot/sketch of V verses x will be as shown below:

Part B

LAB REPORT

4

Solution
Electric field E will be expressed by the following equation:

Plot or sketch of E verses x will be as shown below:

Part C

Solution
Electron drift current is expressed in the following equation:

Considerat...


Anonymous
Just what I needed. Studypool is a lifesaver!

Studypool
4.7
Trustpilot
4.5
Sitejabber
4.4

Related Tags