Photoelectric characteristics experiment of photovoltaic detector

Experiment 25 Photoelectric characteristics of photovoltaic detectors

【Purpose requirement】

1. Observe the photoelectric characteristics of the photodiode;

2. Observe the photoelectric characteristics of the photovoltaic cell.

【Experimental Principle】

Illumination characteristics of the photodiode When there is no light, the reverse resistance of the photodiode is large, the reverse current is very small (generally on the order of nanoamperes), the photodiode is in the off state; the photodiode is in the on state, and the photocurrent The direction of is consistent with the reverse current, the stronger the light, the greater the photocurrent.

【Experiment content】

1. Observe the photoelectric characteristics of the photodiode.

2. Measure the photoelectric characteristics of the photodiode in the photovoltaic mode.

3. Measure the photoelectric characteristics of the photodiode in the photoconductive mode.

【Instruments】

Serial number

equipment name

Model / Specification

Unit price (yuan)

Remarks

1

Design experimental device of photoelectric sensor

DH-SJ3

4500

Can be used with experiment 24

2

DC constant voltage and current source

DH-VC3

900

3

4 and a half digital multimeter

DY2106

290

The experiment requires two pieces, which can be used in common with experiment 24