High Efficiency Solar Cells – Sale Prices of Very High Efficiency Silicon,Multijunction Solar...

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Solar Cells(http://www.greenworldinvestor.com/topics/solar-renewable-energy-greeninvest/solar-cells/) ,Solar Energy(http://www.greenworldinvestor.com/topics/solar-renewable-energy-greeninvest/)

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What are High Efficiency Cells

High Efficiency Solar Cells are those Solar Cells whose average efficiency of converting solar energy into

electricity is in general much higher than average by about 20-30%.Note common silicon solar cells have

an average efficiency of between 17-19% which means that if 1000 kwh of energy is shone on this solar

cell about 170-190 kwh of electricity will be produced.High Efficiency solar cells on the other hand which

are made of silicon produce Efficiency of around 23-25%.Sunpower is the company which makes the

highest efficiency solar panels (http://www.greenworldinvestor.com/2011/07/06/most-efficient-solar-

panels-hite-20ztj-on-the-market-for-sale/) in the world on a commercial scale.The E20 Solar Panel from

Sunpower currently gives a 20% Efficiency.The Difference in Solar Panel Efficiency and Solar Cells

Efficiency is due to the fact that Solar Panels have frames and other components which reduces the

Efficiency Overall of the Solar Cells which make up those Solar Modules.

Efficiency and Spectrum

Theoretically, efficiencies of over 70% could be reached by using hundreds of different layers, each one

tuned to a small range of light wavelengths varying from ultraviolet to infrared. However due to difficulties

in manufacturing such complicated crystals, the idea could not be put into practice. The theoretical

efficiency of multi-junction solar cells is about (../about/) 86.8% for an infinite number of junctions,

implying that more junctions increase efficiency.Efficiency of solar cells (../2011/04/17/efficiency-

of-solar-cells-made-of-siliconmonocrystallinemulticrystalline-thin-film-cigscisasicdtecztsmultijunction/)

made from silicon normally varies from 15-24%

Efficiency Range for Commercial Silicon Solar Cells

Monocrystalline Solar Cells

Solar Cells Efficiency can vary from 18% to 24% for the normal monocrystalline silicon technology.Notesolar cell manufacturers are constantly improving efficiency in order to lower their costs and get ahead in

this competitive solar industry.Sunpower makes the highest efficiency crystalline solar cells on a

commercial scale.Sanyo is the other company which makes the most efficient Monocrystalline cells

.Suniva is challenging the two with a low cost process for making high efficiency monocrystalline solar

cells.

Multicrystalline Solar Cells

Multicrystalline Solar Cells have lower efficiency and costs than monocrystalline solar cells.However they

are currently the more popular though that is changing.They have an efficiency in the range of

14-17%.Some companies like JA Solar are progressing to improving the efficiency of multicrystalline

solar cells to reach monocrystalline solar cells.Note Innovalight a US startup is selling an innovative

material which improves the efficiency and has tied up with a number of big Solar Cell and Panelmanufacturers (http://greenworldinvestor.com/2011/03/29/solar-panel-manufacturers-guide-to-the-biggest-

and-best/)

Very High Efficiency Solar Cells

High Efficiency Solar Cells Sale Prices of Very High

Efficiency Silicon,Multijunction Solar CellsAbhishek Shah wrote on 3 Jul, 2011

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h Efficiency Solar Cells Sale Prices of Very High Efficiency Silic... http://www.greenworldinvestor.com/2011/07/03/high-efficiency-solar-c...

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Very High Efficiency Solar Cells of more than 40% Efficiency are made of exotic materials and are

multijunction in nature.Multjunction Solar Cells (http://www.greenworldinvestor.com/2011/07

/05/multijunction-solar-panels-and-cells-guide-to-manufacturers-efficiencyconcept-and-cost/) are composed

of a number of layers made of different materials which can capture a greater part of the solar

spectrum.These are costly to make as they are mostly done on a lab scale and require materials which

are not commonly availabe.

List of Multijunction Solar Cell Manufacturers

Spire Semiconductorwhich is a small solar equipment company based in the USA hasbeen working with US National Renewable Energy Laboratory (NREL) under an 18 month

incubator project.The company has managed to produce a triple-junction cell with

42.3 per cent conversion efficiency.

1.

Emcore Corporation(NASDAQ: EMKR) is a commercial provider of Solar Cells for

Spacecraft.With a sunlight-to-electricity conversion efficiency of 30%, the ZTJ solar cell is

the highest performance space qualified multi-junction solar cell. Production of the multi-

junctionsolar panels will take place at EMCOREs state-of-the-art manufacturing facilities

located in Albuquerque, New Mexico.

2.

Amonixis the leading designer and manufacturer of concentrated photovoltaic

(CPV)commercial solar power systems.. Originally developed for space-based

applications,Amonix III-V multijunction cells use three different photovoltaic materials in a

single cell, they extract more energy from the range of wavelengths in sunlight.. Under

concentration, this can exceed 39% in volume production (over 41% in world-record

demonstrations).

3.

Cyrium Technologies Inc.,a designer and producer of high efficiency photovoltaic solarcells, The company is privately-held and received its first venture capital funding in 2004.

Cyriums first generation solar cells offer efficiencies of 40 per cent or higher together with

a nearly constant conversion efficiency for solar concentrations from 200 to greater than

1000 suns.

4.

Spectrolab, headquartered in California is a subsidiary of The Boeing Company that

manufacturers space solar cells and panels. . The company claims its NeXt Triple

Junction high efficiency solar cellshave a minimum average efficiency of 29.9%. In 2006

testing at the National Renewable Energy Laboratory demonstrated an efficiency of 40.7%

using triple-junction solar cells developed by Spectrolab.

5.

Sale Prices of High Efficiency Solar Cells

Solar Cells Cost

It is very difficult to buy high efficiency solar cells from top manufactures like Sunpower because they

dont sell solar cells but solar panels.However you can try and buy solar cells from Taiwanese producers

like Neo Solar and others which make good quality though not the very high efficiency solar cells.Its also

difficult to buy solar cells of very high efficiency fro multijunction solar cell suppliers.They anyway cost a

huge amount.

Solar Cells Cost has been decreasing rapidly over the last 3-4 years as the scale has

increased,Technology improved,Raw Material Polysilicon price has declined.Solar Cells which used to

sell for $2.5/watt can be bought on a commercial scale for around $1.2/watt.Note Solar Cell Costs

depend on the Brand of the Company,Mono-Multi and the Shape/Size as well.

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More on this topic(What's this?) (http://www.wikinvest.com/blogger/wikinvest_wire)

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nj-colo-solar-farm) (Telecom Ramblings, 7/3/14)

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energy-sector-etf-breaking-out-ae-how-to-trade-it) (Gold Stocks Today, 6/17/14)

Even High Oil Cant Fuel Solar City Corporation (http://www.themarketfinancial.com/even-high-oil-

cant-fuel-solar-city-corporation/133440) (The Market Financial, 5/28/14)

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Abhishek Shah

Efficiency of Solar Cells

made of

Silicon(Monocrystalline,Multicrystalline),Thin Film

(CIGS,CIS,aSi,CdTe,CZTS),Multijunction

(http://www.greenworldinvestor.com

/2011/04/17/efficiency-

of-solar-cells-made-of-

siliconmonocrystallinemulticrystalline-

thin-film-

cigscisasicdtecztsmultijunction/)

PV Solar Cells Guide to

Solar Cell Costs and

Efficiency,Buying SolarCells ,Major Cell

Manufacturers


/2011/04/05/pv-solar-cells-

guide-to-solar-cell-costs-

and-efficiencybuying-solar-

cells-major-

cell-manufacturers/)

Silicon for Solar Cells

Highly Purified

Polysilicon Refined fromSilicon Metal


/2011/04/17/silicon-for-solar-

cells-highly-purified-

polysilicon-refined-

from-silicon-metal/)

Monocrystalline Solar

Cells Most Efficient

Single Junction SiliconCells,Major Cell

Suppliers,Cost of

Monocrystalline(http://www.greenworldinvestor.c

/2011/04/06/monocrystalline-

solar-cells-most-efficient-

single-junction-silicon-

cellsmajor-

cell-supplierscost-

of-monocrystalline/)

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