Amorphous Silicon Solar Panels were the big rage in 2-3 years ago when the prices of polysilicon the main raw material were touching $500/kg making the mainstream crystalline silicon solar panels very expensive.Amorphous Silicon (a-Si) on the other hand is a non-crystalline silicon which is deposited as an extremely thin layer on glass and other substrates.The cost of the silicon is much lower though the efficiency of solar cells which are made from a-Si is about half of those made from crystalline silicon.Applied Materials with its SunFab turnkey amorphous silicon (a-Si) equipment capitalized on this opportunity, lining up a number of customers with some customer orders in the range of a Billion Dollars.Oerlikon Solar was the other major thin film equipment market winning customers in Europe and China.Sky high poly prices also gave birth to numerous Thin Film startups planning to Manufacture and Use their own equipment rather than selling it .
Thin Film Technology came into prominence with Polysilicon Prices ruling at $400/kg
Solar Thin Film Technology is supposed to be the 2nd Generation successor to the mainstream Crystalline Silicon (c-Si) Technology which accounts for around 85% of world production.With Polysilicon(c-Si raw material) being priced at an exorbitant $400/kg in 2008 (cost of $30/kg) due to supply shortages,many companies entered the Thin Film space attracted by the huge profits in the solar industry.Applied Materials with its SunFab turnkey amorphous silicon (a-Si) equipment capitalized on this opportunity, lining up a number of customers with some customer orders in the range of a Billion Dollars.Oerlikon Solar was the other major thin film equipment market winning customers in Europe and China.Sky high poly prices also gave birth to numerous Thin Film startups planning to Manufacture and Use their own equipment rather than selling it .
Polysilicon Prices crashed to $50/kg turning Business Models Upside Down
With the Polysilicon prices crashing by almost 90% in the intervening 2 years (due to entry of multiple players) to $50/kg at present,most of these business models have become defunct.With the exception of market leader First Solar,no other thin film player has managed to penetrate the top 15 solar producer rankings.Most of the thin film divisions of larger companies have already been written off while smaller startups are struggling to survive with mainstream c-Si module prices down by more than 50%.You can read about the First Wave of Solar Thin Film Bankruptcies here.
Major Amorphous Silicon Manufacturers
Though a lot of companies have gone belly up in the amorphous silicon thin film business,some stalwarts still remain which have grown stronger with the elimination of the weaker hands in the business.Amorphous Silicon still holds good potential though it faces stiff competition from other technologies like Cadmium-Tellerium,CIGs and the crystalline silicon.Oerlikon and other comapies like Mitsubishi have developed the tandem microcrystalline technology which increases the efficiency from 7-8% to 10% by adding another layer of microcrsytalline silicon to the amorphous silicon layer.Companies like Sharp,Astroenergy are the main players remaining now
Other manufactures are Anwell Technologies,Mitsubishi and Xunlight.
Amorphous vs Crystalline Silicon
1) Efficiency – The Efficiency of Amorphous Silicon Solar Panels is about 7-10% depending on different manufacturers while that for crystalline silicon panels can vary from 15% for common solar panels to 20% for the most efficient solar panels from sale by Sunpower.Note the efficiency of Monocrystalline Silicon Cells is on the higher side.
2) Cost – The cost of a-Si solar panels is generally lower by 15-20% due to the efficieny difference with crystalline silicon panels.However the drastic fall in prices of crystalline solar panels of late has made the differnece lower which has impacted the sales of Amorphous Silicon Panels
3) Weight – The Weight of Amorphous Silicon Panels is much lower than that of normal Crystalline Silicon Panels because the Thin Film that is used implies that the substrate can also be thinner.
4) Availability – Crystalline Silicon Solar Panels are much more widely and easily available than A-Si Panels
5) Flexibility – Its possible for Amorphous Panels to be flexible because their lower weight means they can be put on flexible substrates like plastic .This is not possible with crystalline silicon solar panels.
LifeSpan and Sale Prices of Amorphous Silicon Solar Panels
The lifespan of Amorphous Silicon Solar Panels is on par with that of other solar panels and most manufacturers give a warranty of more than 20 years that it won’t degrade more than 80% of its stated power performance.Note crystalline silicon solar panels also come with a standard 25 year warranty and a 10 year product warranty.
The prices of Amorphous Silicon Solar Panels can vary quite a lot depending on the size of the solar panels and the substrate that you are using.In general smaller size 25 watt solar panels cost as much as $10/watt while bigger sizes like a 150 Watt Solar Panels will cost you $3/watt.Chinese Amorphous Silicon Solar Panels are of much lower cost retailing for as low as $1/watt in bulk orders or for $1.5-$1.75/watt in retail.