Exam 2 solution - EMA 3413 Electronic Properties of Materials Spring Exam time Location Exam 20ll II Thursday March 31 9:30 am to 10:30 am(60

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EMA 3413 Electronic Properties of Materials Spring 20ll Exam II Exam time: Thursday, March 31, 9:30 am to 10:30 am (60 minutes) Location: 229 ll4AEB o This is a closed-book exam; you are NOT allowed to bring any textbook, notes, or other materials. o You are allowed to use a basic scientific calculator. o 100 total points, plus 10 bonus points. o Some physical constants that you may find useful and a part of the Period Table of Elements are given on the next page. . If you run out of space on any page, please use the last page (page 10) to complete your answer. But if you do so, please mark on the original page with words such as "more see page 10". o Some general guidelines for completing the exam: o Make sure you compile your answers to the questions in a formal way by using complete sentences instead of scattered words or phrases to explain your reasoning and j ustihcations. o Provide sufficient middle steps in calculations and derivations. o Dehne the symbols and acronyms that you use, andlor illustrate on diagrams. o Pay attention to the units of various parameters. The unit should be provided as part of your answer. o For calculations, write down the equations first, perform equation derivations, and only plug in the values of the parameters for calculation at the final step. Honor Pledge: On my honor,I have neither given nor received unauthorized aid in completing this exam. 'l+- NAME: )aL,urA t.r.^rt (PRINT) (Signature)
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1. Multiple choice questions. (5 points each,30 total points) (1) Which of the following statement about silicon impurities in GaAs is true? (You may refer;o the part of the Periodic Table of Elements given on the cover page.) Lkuto^, *. aonors in GaAs if they replace *uuro r,and are acceptors if they replace As atoms.P B. Si atoms are acceptors in GaAs if they replace Ga atoms, and are donors if they replace As atoms. C. Si atoms are donors in GaAs regardless if they replace Ga or As atoms. D. Si atoms are acceptors in GaAs regardless if they replace Ga or As atoms. Your answer: A (2) Compare the band gaps of GaAs vs. InAs and ZnS vs. CdTe (refer to the Period Table of Elements). Which of the following statements is TRUE? Eg,Z^9 t
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This note was uploaded on 11/16/2011 for the course EMA 3413 taught by Professor Xue during the Spring '11 term at University of Florida.

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Exam 2 solution - EMA 3413 Electronic Properties of Materials Spring Exam time Location Exam 20ll II Thursday March 31 9:30 am to 10:30 am(60

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