Bulk technologies in solar cells, Physics

Assignment Help:

BULK TECHNOLOGIES: THE bulk technologies are often known as wafer-based manufacturing. In other words in each of these approaches self-supporting wafers between 180 to 240 micrometers thick are processed and then soldered jointly to create a solar cell module. By far the most prevalent bulk material for solar cells is crystalline silicon abbreviated as a group as also known as “solar grade silicon”. Bulk silicon is separated into multiple categories according to crystalline and crystal size in the resulting ingot, or ribbon or wafer.

MONOCRYSTALLINE SILICON: Generally made use of the Czochralski process. Single crystal wafer tends to be expensive. And due to cut from cylindrical ingots, they do not totally cover a square solar cell module without a substantial waste of refined silicon. Therefore most C-Si panels have exposed gaps at the corners of four cells. Singly crystalline wafers can be made into excellent high efficiency solar cells but they are generally considered to be too expensive for large scale mass production.

POLY-OR-MULTI CRYSTALLINE SILICON: poly crystalline silicon wafers are made by wire sawing block cast silicon ingot. Large blocks of molten silicon are carefully cooled and solidified and then taken out in thin (180 to 350 micrometer) slice or wafers .The wafers are use usually lightly p-type doped. To make a solar cell from the wafer, a surface diffusion of n type do pants is on front side of the wafer. This makes a p-n junction a few hundred nanometres beneath the surface. Antireflection coating , which increase the amount of light coupled into the solar cell, are typically applied, next. These cells are less expensive to produce than single crystal cell but are less efficient.

RIBBON SILICON

They are formed by drawing flat thin films from molten silicon and having a multi crystalline structure. These flat wires or metal ribbons are then assembled into modules or solar panels. Solar panel has a sheet of tempered glass on the front and a polymer encapsulation at the back. These cells have lower efficiencies than poly-Si, but save on production costs due to

a great reduction waste , as this approach does not require sawing from ingots.


Related Discussions:- Bulk technologies in solar cells

Project, comparison of magnetic moments using an vibrational magnetometer

comparison of magnetic moments using an vibrational magnetometer

Skin diease , which radio isotpo used in skin diease treatment

which radio isotpo used in skin diease treatment

Rectilinear motion, An elevator is stopped at the ground floor. It starts m...

An elevator is stopped at the ground floor. It starts moving upwards at constant acceleration a>0 for 5 seconds. It then keeps a constant speed for 35 seconds. Finally, it slows do

What is Electrolytic cell, Normal 0 false false false E...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4 Normal 0

Relative veloctiy, The velocity of a motor boat with respect to Still Water...

The velocity of a motor boat with respect to Still Water is 7 m/s and the velocity of water in river is 3 m/s. When the boat starts moving upstream, a float was dropped from it.

With all the limitations, With all the limitations, what are the uses of fi...

With all the limitations, what are the uses of fiber optics? There is an ordinary misconception about the quantity of light required for a given task: more light is not essenti

What is the v of he gas, At what temperature would the average speed of hel...

At what temperature would the average speed of helium atoms equal (a)the escape speed from Earth, 1.12 ´ 10 4  m/s, and (b) the escape speed from the Moon, 2.37´ 10 3  m/s? (See Ch

Derive the Electric Field, Start from the expression of the electric field ...

Start from the expression of the electric field outside an infinite sheet of uniform surface charge density, E = s/2epsilon, derive the electric field just outside an ideal conduct

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd