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PN Junction Characteristic & Boltzmann Constant Experiment

$1,300.00 / Set | 1 Set (Min. Order)
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30 day(s) after payment received
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Place of Origin:
Zhejiang, China
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Packaging & Delivery

Selling Units:
Single item
Single package size: 
35X36X31 cm
Single gross weight:
5.000 kg
Lead Time :
Quantity(Sets) 1 - 1 >1
Est. Time(days) 30 To be negotiated


This apparatus designed a micro current power supply to be used as the forward current of the PN junction. By adjusting the micro current to obtain the forward voltage drop across the PN junction, this can effectively avoid the instability of the measured micro current and accurately measure the forward voltage drop. A temperature control device is designed to obtain the volt-ampere characteristic curve of the PN junction at different temperatures, and the relationship between the PN junction voltage, current and temperature is studied, from which the Boltzmann constant k, the sensitivity S and the forbidden bandwidth of the silicon material are obtained.



The physical properties of semiconductor PN junctions are an important foundation of semiconductor physics. Using this apparatus, the relationship between the PN junction diffusion current and the voltage can be studied. Students can also learn that this relationship follows the exponential distribution law, and the physics important constant, the Boltzmann constant, can be measured accurately. At the mean time, the relationship between the PN junction voltage and the thermodynamic temperature can also be measured. With this relationship, students can get the sensitivity S of the temperature sensor which made by PN junction. Further, the temperature 0 K’s forbidden bandwidth of the silicon material can be obtained approximately.



Constant current output IF

The micro current output is divided into 4

levels: 10-6~10-9A

Micro current output range: 2nA-1mA

Resolution: 1nA

3.5 digital display, With digital output port


Voltmeter Ube

Range: 0-2.000V

3.5 digital display, With digital output port

Temperature Control Power Supply II

Range: room temperature ~ 100℃

Temperature accuracy: ±0.2

Resolution: 0.1℃

Control mode: PID, semiconductor heating and air-cooled;    Temperature sensor: Pt100

With digital output port


PN junction samplePN junction formed by short-circuiting the CB junction of a low-power NPN silicon transistor (2SC1815, S9013)
Machine erro<5%



Parts List:


PN Junction Characteristic & Boltzmann Constant ControllerBEM-57141
Temperature Control Power Supply IIBEM-50511
PN Junction Heating Device
PN Junction ProbeBEM-50532



Apparatus x 1; Power cord x 2; Connection cable x 5; Sheathed banana plug cable x 2; Manual x1


Optional accessories




Wireless Voltage SensorPS-32112
PASCO Capstone Software UI-54001