Content 1.ObjectivePage 2 2.Equipment and Components 2 3.Introduction 3 4.Four-Point examine 4 4.1Theory 4 4.2 prove 7 4.2.1Four-Point Probe Station 4.2.2Four-Point Probe measuring rod 4.2.3Discussion 5. dorm Effect 11 5.1Theory 5.2Experiment 5.2.1 residency Effect Measurement 5.2.2Discussion 6.Advantages and Disadvantages 15 6.1Four-point probes measurement 6.2Hall effect measurement 7.Photoconductivity of Light mutualist Resitor (LDR) 16 1. Theory 2. Experiment 8.Conclusion 20 9.Appendix 21 1Objective The objectives of the specimen are: a) development the four-point probe technique to forge the resistivity, impureness concentration and mail carrier wave mobility of silicon ensamples. b) Using Hall effect measurement to determine the dopant/carrie r type, Hall coefficient, carrier concentration, conductivity and carrier mobility of germanium samples.
c) To study the photoconductivity of a Light Dependent resistivity (LDR) 2Equipment and components Four-point probe station Electromagnet digital gaussmeter Source measurement unit Digital multimeter DC power supply Silicon wafers (x2) Mounted germanium samples (x2) 3 Introduction Electrical characterization of worldlys evolved in three levels of understa nding. In the proto(prenominal) 1800s, the ! resistance R and conductance G were treated as deliberate physical quantities obtainable from two-terminal I-V measurements (i.e. current I, voltage V). Different sample shapes gave different resistance values. This led to the understanding (second level) that an intrinsic solid property like resistivity (or conductivity) is...If you want to get a full essay, order it on our website: OrderCustomPaper.com
If you want to get a full essay, visit our page: write my paper