Efficiency Of Solar Cells

I am doing a proj on solar cells, and i was wondering why an increase in temperature decreases the efficiency of solar cells.

Overall resistivity of the entire circuit rises with internal temperature, despite the fact that the semiconductors in the circuit become more conductive with temperature rise.

2008-06-12 16:13:39 by BB4life

www.C4ontario.ca http - With new flexible solar panels developed at McMaster University, any curved surface can become a source of power. The ...

I can imagine how to measure output power of solar cells. Then, how can I measure power of input-light? However I turn on 100V lighting, a half of power runs away as temperature. And all power of light can not reach solar cells because of...

You need to know the amount of energy available to the surface of the solar cell. This can be measured or estimated. Here are several sites that talk about solar radiation. There are many others if you choose to look for them;

2009-07-13 07:35:42 by YS

Solar cells/solar panels are environment friendly, but at the moment other sources of electrical energy are cheaper than solar power. How can we make solar cells more efficient and cheaper?

Every solar cell has a maximum theoretical efficiency. It is a property of that cell, and no matter the conditions it cannot be any higher. The most efficient one, to date, is ~35%. Factoring in material and system limitations, the maximum efficiency

2006-07-19 11:08:04 by DeeJay

I know you have to calculate (solar --> electrical) and then (electrical --> thermal) but what do you do with these two figures then? Do you average them? Any help would be great! Thanks.

Energy efficiency is always power out divided by power in.

In the case of solar cells, it is the watts of electrical energy produced by the cells divided by the watts of electromagnetic energy striking the solar panels.

2009-11-09 01:46:53 by Pezz

Read somewhere that there was a solar cell with an efficiency of over 40% but is that one a silicon solar cell?
http://www.iea-pvps.org/pv/materials.htm
Forgot to add this. Mentions about conversion efficiency of silicon based solar...

http://www.gizmag.com/go/6563/picture/29 635/

The 40% is not Si, but it is multi-junction, to capture a broader frequency spectrum of sunlight. The picture in the link is hard to read, but I believe there is Ge and GaAs as well as...

2007-06-30 22:09:38 by muhlange

Currently, solar cells are about 30% efficient. How can nanotechnology may change this in the future? What do they expect solar cell efficiency to increase to and what impact would this have on the use of solar cells?

There is more than one type of solar technology and it is getting more efficient all the time. All I know for sure is my PV system generates more energy than I was quoted and I will break even in about 6 years so I'll have about 18 years of free...

2009-05-10 14:05:41 by Clemma