Answered: Silicon and Germanium are some of the…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Silicon and Germanium are some of the most used semiconductors in the manufacture of photodetector devices, so consider the data below and resolve the issues proposals.
(a) The band gap energy for Si and Ge are, respectively, 1.11eV and 0.67eV. calculate the cutoff wavelength for Si and Ge. Which is the most suitable for light detection not visible? Why?

(b) Considering the responsiveness values (R), calculate the photocurrent generated in the device, for Si (graph I.A) and Ge (II), if light hitting the graphic photodetector with 5mW optical power is emitted by a diode laser at 750nm and 1550nm?

Responsivity(A/W)
0.8-
Responsivty(AW)
0.6
0.7-
05.
0.6-
0.4
0.5
0.4-
03-
A B
0.3
02
0.2
0.1
0.1
05
Wavekngth um)
200 400 600 800 1000 1200
1.5
2
Wavekength(nm)
(I)
(II)

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