MadSci Network: Physics

Subject: Solar Cells and Temp

Date: Wed Aug 19 01:45:59 1998
Posted by Chas Pagon
Grade level: 10-12
School: Eltham High School
City: Melbourne State/Province: Victoria
Country: Australia
Area of science: Physics
ID: 903509159.Ph

Hello Mad People!
My name is Chas and I am a year 12 student at Eltham High School.
For my physics class I am curently carying out a experiment to 
investigade the voltage out put of a silicon photovoltaic cell vs 
light colour and intensity. I was investigating the effect of changing 
the temp on the voltage out put and I found that as temperature 
increases the voltage output decreases. When this relationship is 
graphed a negative cubic is formed which has a point of inflection at 
25 degrees. Can you explain this? It is my understanding that the 
power output remains constant regardless of temperature but I dont 
know why the voltage output changes. My hypothesis that it is a design 
feature which limits the variation in the output due to increased 
light intensity as this is usualy associated with a temperature 
increase. Apart from this I am at a loss to explain my results along 
with the many people I have asked. Can you help?

Re: Solar Cells and Temp

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