blob: 3278fded7dd9652657cc3e190f752d4735e8e36c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
// Example no.5.1
// To calculate (a) the photon incidence rate, (b) the photon absorption rate, and, (c) the quantum efficiency.
// Page no.196
clc;
clear all;
// Given data
lambda=550*10^(-9); // The wavelength of electromagnetic wave in m
c=3*10^8; // Speed of ligth in air
h=6.626*10^(-34); // Planck's constant
alpha=10^4; // absorption coefficient
W=3*10^-4; // width of the active region
Pi=1*10^-9; // optical power
eta=0.9; // the fraction of photocarriers that contribute to the photocurrent
Rp=0; // the power transmission coefficient at the air–semiconductor interface
// (a) the photon incidence rate
Eph=(h*c)/lambda; // The energy of a photon
Rincident=Pi/Eph; // The photon incidence rate
// Display result on command window
printf('\n The photon incidence rate = %0.2f X 10^9 photon/s',Rincident*10^-9);
// (b) the photon absorption rate
Rabs=(Rincident*(1-exp(-alpha*W))); // The photon absorption rate
// Display result on command window
printf('\n The photon absorption rate = %0.2f X 10^9 photon/s',Rabs*10^-9)
//c) the quantum efficiency
neta=(1-Rp)*eta*(1-exp(-alpha*W)); // The quantum efficiency
// Display result on command window
printf('\n The quantum efficiency = %0.3f',neta)
|
