Photovoltaic (PV) cells transform visible radiation energy into electrical energ
ID: 1784284 • Letter: P
Question
Photovoltaic (PV) cells transform visible radiation energy into electrical energy. When used the other way around, i.e. by driving current through them, they emit radiation. This phenomenon is called electroluminescence (EL) and the emitted EL intensity is related to the number of minority carriers in the cell base layer, thus giving information on intrinsic and extrinsic cell parameters influencing them: minority carrier lifetimes, diffusion length, defects, etc. . In addition, a number of factors affect the generation of electricity using photovoltaic cells including the oft-neglected factor of operational temperature
The student will investigate the use of simple webcams for monitoring and mapping the EL behaviour of PV cells and the use of simple electronic apparatus (e.g. PV panel, digital multimeters, the fabrication of an LED or halogen lamp array solar simulator as a probe light source (per design outlined.
*fist should design a solar simulator: what equipment should use! give an idea?
* second: using webcam: what is the best webcam 1.1 micro and cheaper to do measuring and capturing the results of IV characterize?
Explanation / Answer
Take a xenon light source, then through reflectors, optical lenses, filters shape up the light beam. In this way, we can design a solar simulator.
Webcams are quite available in market of different companies.