Energy Band Gap By Four Probe Method

Energy Band Gap By Four Probe Method

Energy Band Gap By Four Probe Method

Experiment consists of the following :

Probes Arrangement : It has four individually spring loaded, coated with Zn at the tips. The probes are collinear and equally spaced. The Zn coating & individual spring ensure good electrical contacts with the sample. The probes are mounted in a bush which ensure a good electrical insulation between the probe. A spacer near the tips is also provided to keep the probes at equal distance. The whole arrangement is mounted on a suitable stand and leads are provided for current and voltage measurements.

Features :

• Sample : Ge (Germanium) crystal in the form of a chip slice.
• Oven : It is a small oven for the variation of temperature of the crystal from room Temperature to about 200Deg C. Operating Temperature is 180DegC
• Four Probes Set-up : (Measuring Unit)-LCD Display for all Parameters
• Soft Press Keys for Menu
• USB Interface
• Software provided for PC Interface
• Direct Graph Plot & calculation of Band GapE of Energy g as per Selected Point from Graph

Technical Specification

• Voltage Range :0 – 4.000V
• Resolution :1mV at 4V range
• Accuracy :± 0.1 % of reading ± 1 digit
• Current range :0 – 20 mA
• Resolution :10 µA
• Accuracy :± 0.25 % of the reading ± 1 digit.
• Memory capacity :8 KB
• Logging :up to 256 readings storage
• PC interface :USB
• Selection keys :Keypad
• Display :16×2 Alphanumeric LCD
• Oven with Temperature Range : 0 – 200 ºC (with 1 ºC resolution)
• Software :EasyLogPro v545
• Requirements:
  • USB Drivers
  • USB Cable
• PC / Laptop :Window Based (Only 32 Bit operating System Support)