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

---
 2594/CH2/EX2.23/Ex2_23.sce | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100755 2594/CH2/EX2.23/Ex2_23.sce

(limited to '2594/CH2/EX2.23/Ex2_23.sce')

diff --git a/2594/CH2/EX2.23/Ex2_23.sce b/2594/CH2/EX2.23/Ex2_23.sce
new file mode 100755
index 000000000..f4f4c9823
--- /dev/null
+++ b/2594/CH2/EX2.23/Ex2_23.sce
@@ -0,0 +1,18 @@
+clc
+Nd=1*10^17
+disp("Nd = "+string(Nd)+"cm^-3") //initializing the value of effective energy density of state.
+Ec_Ed=0.045
+disp(" Ec_Ed = "+string(Ec_Ed))//initializing the value of donor ionisation level.
+Vt=0.0259
+disp("Vt = "+string(Vt)+" eV ")//initializing the value of thermal voltage.
+Nc=2.8*10^19
+disp(" Nc = "+string(Nc)+"cm^-3")//initializing the value of effective density of state of conduction band.
+e=2.718
+disp("exp = "+string(e))//initializing the value of exponential.
+N=(((Nc/Nd)*e^((-(Ec_Ed))/Vt))+1)^-1
+disp("Fraction of electron still in the donor state,(nd/(nd+n)=(((Nc/Nd)*e^((-Ec_Ed)/Vt))+1)^-1)= "+string(N))//calculation
+
+
+//this is solved problem 2.10 of chapter 2.
+ 
+
-- 
cgit