Diodes: Electronics 1 - Chapter 2

Pr. G. G. ALLOGHO / Electronique 1 / Chapitre 2 : DIODES 2
1. UNDERSTANDING DIODES
MATERIALS
Silicon and germanium are semiconductor materials
used in the manufacture of diodes, transistors, and
integrated circuits.
DOPING
      doping!" # 
$      %   
%&N type P type.
 $%%
   %    !
   %  
"

Pr. G. G. ALLOGHO / Electronique 1 / Chapitre 2 : DIODES 3
DOPING (continued)
' impurities    (  %  
&  electrons &  % %
$      )  % 
&holes&%%"
DIODE JUNCTION
*      (  %
+)%diode junction 
PN junction!"
 +   &  $   
%" ,$   %  
$-%)(+"
QUESTION
*%.%"$+/

Pr. G. G. ALLOGHO / Electronique 1 / Chapitre 2 : DIODES 4
FIGURE 2.1

Pr. G. G. ALLOGHO / Electronique 1 / Chapitre 2 : DIODES 5
    )     "
'(01.%"
CURRENT FLOW
&$%
 )( + in one direction only" .% "2 $ 
$$"
2. ANODE / CATHODE