Solar Power - Photovoltiac cell confusion


by examorph
Tags: cell, confusion, photovoltiac, power, solar
examorph
examorph is offline
#1
Feb7-13, 03:29 PM
P: 37
I have been trying to understand how PV cells work in solar panels and have become a bit confused, here is what I have read so far:

The PV cell is basically a PN junction diode with a conductive connection on the P and N material between this connection there is a load, a lamp for example, the Photon from the light strikes the PV cell and causes a electron to form in the N material and a hole to form in the P material, the electron wants to get to the hole so it goes through the conductive material which is joining the two P and N materials, through the load and into the P material where it joins together with the hole.

What I dont understand is, there are many electrons in the N material and many holes in the P material, what is stopping these from meeting, I mean the only combination of holes and electrons seems to be coming from the photons and not the electrons and holes which were formed from the doping, I would have thought that if you connected a wire from the P side to the N side all the electrons and holes would meet and cause the cell or diode to change back to its initial semiconductor state.
Phys.Org News Partner Engineering news on Phys.org
Fiber-optic microscope will help physicians detect cancer, diseases at early stages
Wind tunnel tests support improved aerodynamic design of B61-12 bomb
Smart sensor technology to combat indoor air pollution
Dr_Morbius
Dr_Morbius is offline
#2
Feb10-13, 05:05 PM
P: 155
http://en.wikipedia.org/wiki/Solar_cell


Register to reply

Related Discussions
CPC and Fresnel Lenses for Solar Cell Power Classical Physics 5
Maxiumum Incident power on solar cell ? General Physics 3
How big would a solar power cell need to be... General Engineering 2
Solar Cell calculating the power output Introductory Physics Homework 2
Power Density of Solar Cell Question Introductory Physics Homework 1