Skip to main content

HOW SOLAR PANEL WORKS ?

Solar panel is a device which convert's light energy in to electrical energy .

it is basically a PN junction diode having some important change in its construction . it works on photoelectric principle.

CONSTRUCTION - 

To constructing a practical solar panel we will arrange a PN junction and at the contact surface positive charge carrier's (holes) will move toward N-type semiconductor and negative charge carrier's (electron's) will move toward P - type semiconductor  (opposite charge attracts each other) forming depletion layer .

 

A thin layer of either of one kind of semiconductor  is used towards the light rays so they can reach to the depletion layer easily ,because there neutral charge carriers atom's will absorb energy from photon's containing by light rays to produce charge carriers .  

 

That charge carrier's than get influenced by already present electrostatic field created due to depletion layer whose direction is from  "+ to - " due to this electric field there will be force on charge according to the .

                                       E = F/q

                                       F=Eq

And that force will make - ve charge carriers to enter N-type region and + ve charge carrier will enter into P-type semiconductor , but although we generated free charge's they will not move in semiconductor because they don't have such high conductivity as conductor's .

So we provide metal strip to N-type semiconductor than there will be accumulation of charge and if we connect it to other end P-type semiconductor  + charge carrier's will accumulate there .

So as charge increases voltage will increases so current will start to flow  .

 

Comments

Post a Comment

Popular posts from this blog

WHAT IS LIGHT EMMITING DIODE ?

LED is a very commonly used device nowadays we use it in various application because of its small size and,cheap prize its very popular among peoples . we use it even in special television set for screen as LED pixels which is useful for clarity for distance audience . basically it is a diode which is set to be in forward condition .   Full form of LED is LIGHT EMITTING DIODE . As evident from name it is diode who produce photon when voltage is given to it . this type of diode is not made by generally used semiconductor's like silicon and germanium it manufactured by arsenic phosphorus and gallium . various types of color can can be produced by changing quantities of material it made up of .  WORKING - Basically it is like a normal diode just difference with it produces light when a forward voltage applied to it . as we know  electron needs energy to jump from lower orbit to higher orbit ,  the working of LED is typically reverse of this process electr...
Post a Comment
Read more

BEGINNING OF THERMODYNAMICS ?

Thermodynamics is the the science of energy . in which we study about how energy could  be converted into  primary interest with high efficiency . although The first commercially-successful engine that could supply continuous power to a machine, was the atmospheric engine , invented around 1712 , but there was not proper scientific explanation which can describe how system is running and at what condition's it could get more efficiency . First scientific formulation of thermodynamic was made by a french military Engineer Sadi Carnot often described as Father of Thermodynamic . He published his work in a book  - Reflections on the Motive Power of Fire and on Machines Fitted to Develop that Power .  He was the first person talked about how steam engine's or system efficiency could be increased by increasing the temperature difference between source body and sink body .  source body - Is the body from which system takes heat as input to convert it into p...
Post a Comment
Read more