Replies to post #35320 on Coretec Group Inc (CRTG)

[iamthe walrus]

You might send the question to management now as well as later so you have a good chance of them getting the question. Have a great day!

[iamthe walrus]

Pegs I think in part metamaterial answered your question ... he made the point that these other materials like Quantum materials has cannot be printed onto lower temperature substartes , like shingles.Thats why they are not competition for Coretec.Some thing to do perhaps with lower deposition rates at lower temperatures and the whole aspect of what CHS does v.s. others when heated at lower temperatures.

metamaterial post:

Pegs1 posted a note a while back on CHS for solar. Based on the literature and patents, when heated CHS forms silicon. It first forms amorphous silicon with is commercially available and is typically 6% efficiency. The benefit of CHS compared to commercial amorphous solar is that you can now print it onto lower temperature substrates, like shingles.

When CHS films are heater further, it forms microcrystalline silicon which is over 10% efficient but still well below 29% efficient which is optimal. I doubt CHS can get anywhere close to creating 29% solar but on the other hand high efficiency Silicon solar energy cannot be printed onto a low temperature substrate.

So a key advantage of CHS is not making better silicon solar cells, but allowing silicon solar cell to be produced onto low temperature substrate.

There are many other advantages of CHS but hope this helps answers Pegs1 question.

[iamthe walrus]

Pegs,
CHS v.s. monosilane (which is a billion dollar material): This also talks about CHS and the lower temperature for decomposition, I think this is the advantage Coretecs CHS has over everyone out there but maybe a little hard to understand the significance of it this aspect of CHS. It seems this allows it to be be used for more applications than other materials because of this aspect of it that keep other silicon materials from being effective in many ways. In other words silicon based anodes work far better than graphite but cracking and fracturing during lithiation has kept it on the shelf but CHS has solved that major problem many have been trying to over come for years now so Coretec can be a leader in replacing graphite anodes with their materials which would be huge!!

A key advantage of CHS is being a liquid precursor to silicon-containing electronic materials versus the commonly used gaseous monosilane (SiH4). As a liquid precursor, CHS offers the ability to use solution-based processing routes leading to safer handling, more efficient materials utilization, significant cost savings and performance enhancing material structures. Another key advantage of CHS is the lower temperature for decomposition of CHS to silicon, leading to the use of a broader range of substrates, many of which are lower cost. Monosilane requires high temperatures (500 - 800°C) for decomposition to silicon, whereas CHS forms silicon at temperatures as low as 300°C. In addition, during the decomposition of CHS, the rate at which silicon is formed increases by a factor of six relative to monosilane, leading to significant cost savings due to the increased rate of production. The company anticipates that CHS will first be used as an alternative to current methods to introducing silicon into lithium ion batteries or when manufacturing silicon-based microelectronics and printable/flexible electronics.

[iamthe walrus]

In short quantum materials products dont have the ability to be printed or painted on to shingles as Coretecs product can be for use in solar energy applications ....Quantum cant do these things below ...

..The benefit of CHS compared to commercial amorphous solar is that you can now print it onto lower temperature substrates, like shingles.

...but on the other hand high efficiency Silicon solar energy cannot be printed onto a low temperature substrate.

...So a key advantage of CHS is not making better silicon solar cells, but allowing silicon solar cell to be produced onto low temperature substrate

[metamaterial]

A QD essentially absorbs radiation at one wavelength of light and then re-emits the light at the desired wavelength based on how it has been tuned by varying the diameter and composition. The solar energy commonly lost is the portion in the LWIR or thermal region. By using QDs, you can collect the entire spectrum of available radiation and move it into the optimal region for the type of solar being used for conversion to electricity. In terms of achieving 2x what silicon can provide, that is theoretical not realty. The best cells available are produced for space and are multifunction cells with efficiencies approaching 50%. Unfortunately they are to expensive for terrestrial use but are being evaluated for use on high altitude long endurance vehicles.