Higher Physics Lab Soild State Physics

STUDY OF P-N JUNCTION & ENERGY BAND GAP SK013

 

Exp-1 Determination of reverse saturation current.
Exp-2 Study of Energy Band Gap of p-n Junction.
Exp-3 Study of Junction capacitance.

  • Suitable for Diodes, Transistors.
  • Built - in current source, bias voltage generator.
  • Built - in power supply for oven.
  • Saturation current.
  • Energy band gap.
  • Temperature coefficient.
  • Junction capacitance.

Principle and Working:
The slope of V-T curve used to measure the temperature coefficient of the junction voltage and the energy band gap is given by

Where V(T) - Voltage at given temperature, dV/dT - Slope of curve, for Si, m = 1.5, η=2 at 300K and for Ge, m = 2, η=1 at 300K, η - Material constant and q - charge of electron.

Contents:

Cat. No. Item Name Qty.
SN170 P-N junction setup 1
CK142 Oven with temperature sensor 1
R4536 Junction transistor 1
R0322 Diode 1N5402 1
R8087 CRO probe 1

* Additionally Required :
*CRO is an optional item, not supplied with the setup.

Solid State Physics Experiments