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/EX7.2/EX7_2.sce | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100755 2342/CH7/EX7.2/EX7_2.sce

(limited to '2342/CH7/EX7.2')

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
-- 
cgit