From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 2342/CH7/EX7.1/EX7_1.sce | 12 ++++++++++++
 2342/CH7/EX7.2/EX7_2.sce | 33 +++++++++++++++++++++++++++++++++
 2342/CH7/EX7.3/EX7_3.sce | 19 +++++++++++++++++++
 3 files changed, 64 insertions(+)
 create mode 100755 2342/CH7/EX7.1/EX7_1.sce
 create mode 100755 2342/CH7/EX7.2/EX7_2.sce
 create mode 100755 2342/CH7/EX7.3/EX7_3.sce

(limited to '2342/CH7')

diff --git a/2342/CH7/EX7.1/EX7_1.sce b/2342/CH7/EX7.1/EX7_1.sce
new file mode 100755
index 000000000..2474bb503
--- /dev/null
+++ b/2342/CH7/EX7.1/EX7_1.sce
@@ -0,0 +1,12 @@
+// Exa 7.1
+format('v',6)
+clc;
+clear;
+close;
+// Given data
+O_V = 5;// output voltage in V
+V_D = 1.5;//voltage drop in V
+R = (O_V - V_D)/O_V;
+R = R * 10^3;// in ohm
+disp(R,"The resistance value in Ω is");
+disp("As this is not standard value, use R=680 Ω which is a standard value")
diff --git a/2342/CH7/EX7.2/EX7_2.sce b/2342/CH7/EX7.2/EX7_2.sce
new file mode 100755
index 000000000..07ea8d371
--- /dev/null
+++ b/2342/CH7/EX7.2/EX7_2.sce
@@ -0,0 +1,33 @@
+// Exa 7.2
+format('v',6)
+clc;
+clear;
+close;
+// Given data
+N_A = 7.5*10^24;// in atoms/m^3
+N_D = 1.5*10^22;// in atoms/m^3
+D_e = 25*10^-4;// in m^2/s
+D_h = 1*10^-3;// in m^2/s
+Torque_eo = 500;// in ns
+Torque_ho = 100;// in ns
+n_i = 1.5*10^16;// in /m^3
+e = 1.6*10^-19;// in C
+P_C = 12.5;// in mA/cm^2
+// Electron diffusion length
+L_e = sqrt(D_e*Torque_ho*10^-9);// in m
+L_e = L_e * 10^6;// in µm
+// hole diffusion length
+L_h = sqrt(D_h*Torque_ho*10^-9);// in m
+L_h = L_h * 10^6;// in µm
+// The value of J_s can be calculated as,
+J_s = e*((n_i)^2)*( (D_e/(L_e*10^-6*N_A)) + (D_h/(L_h*10^-6*N_D)) );// in A/m^2
+J_s = J_s * 10^3;// in A/cm^2
+V_T = 26;// in mV
+I_lembda = 12.5*10^-3;
+I_s = 2.4*10^-4;
+// Open circuit voltage 
+V_OC = V_T*log( 1+(I_lembda/J_s) );// in mV
+V_OC = V_OC * 10^-3;// in V
+disp(V_OC,"Open circuit voltage in V is");
+
+// Note: There is calculation error to evaluate the value of VOC since 26*10^-3*log(1+12.5*10^-3/2.4*10^-4) calculated as 0.10318 not 0.522 V
diff --git a/2342/CH7/EX7.3/EX7_3.sce b/2342/CH7/EX7.3/EX7_3.sce
new file mode 100755
index 000000000..256dd5100
--- /dev/null
+++ b/2342/CH7/EX7.3/EX7_3.sce
@@ -0,0 +1,19 @@
+// Exa 7.3
+format('v',6)
+clc;
+clear;
+close;
+// Given data
+Phi_o = 1*10^21;// in m^-2s^-1
+Alpha = 1*10^5;// in m^-1
+W = 25;// in µm
+W =W * 10^-6;// in m
+e = 1.6*10^-19;// in C
+// At the front edge of intrinsic region, the generation rate of EHP
+G_L1 = Alpha*Phi_o;// in m^-3s^-1
+// At the back edge of intrinsic region, the generation rate of EHP
+G_L2 = Alpha*Phi_o*%e^( (-Alpha*W) );// in m^-3s^-1
+// Photo current density,
+J_L = e*Phi_o*(1-%e^(-Alpha*W));// in A/m^2
+J_L = J_L * 10^-1;// in mA/cm^2
+disp(J_L,"Photo current density in mA/cm^2 is");
-- 
cgit