Replies to post #1660 on Quantum Materials Corp. (fka QTMM)

[Qdot]

PV, you're up early and working hard, like those three-legged, single-sworded tetrapods. Great post!

I'm with you on the potential. It is huge. I think it may take a year longer than you to reach big volume sales however. If we just started selling the QDs for research purposes, it's going to take a little while before they end up in finished product. I'm OK with that, and willing to wait.

Solar, on the other hand, could be immediate, depending on where they are with the product development. So, I hope they give us some news on that real soon. Then QMC can make lots of tetrapods, and Solterra - lots of panels. And I hope we don't license it to First Solar (even though I have a little stock), and I hope we don't produce in China. This is a great new industry for the USA!

Qdot

[FreeGrass]

OK THAT'S IT!!!!!!!!!!!!!
GET OUT A HERE AS BOARD MODERATOR AND KEEP DRINKING!!!
PLEASE!!!!!!!!!!!!!!!!

But to me it seems like it was more smoke then water in your body!
You made too much sense for being drunk! ;)

<<I must have been stone sober!>>
Did you mis a "d" behind stone?

<<beg everyones indulgence to have a little fun for a change with a little more humor in my explanation.>>

And here's the brain twister...
(but understandable)

Simple explanation

1. Photons in sunlight hit the solar panel and are absorbed by semiconducting materials, such as silicon.
2. Electrons (negatively charged) are knocked loose from their atoms, allowing them to flow through the material to produce electricity. Due to the special composition of solar cells, the electrons are only allowed to move in a single direction.
3. An array of solar cells converts solar energy into a usable amount of direct current (DC) electricity.

[edit] Photogeneration of charge carriers

When a photon hits a piece of silicon, one of three things can happen:

1. the photon can pass straight through the silicon — this (generally) happens for lower energy photons,
2. the photon can reflect off the surface,
3. the photon can be absorbed by the silicon, if the photon energy is higher than the silicon band gap value. This generates an electron-hole pair and sometimes heat, depending on the band structure.

When a photon is absorbed, its energy is given to an electron in the crystal lattice. Usually this electron is in the valence band, and is tightly bound in covalent bonds between neighboring atoms, and hence unable to move far. The energy given to it by the photon "excites" it into the conduction band, where it is free to move around within the semiconductor. The covalent bond that the electron was previously a part of now has one fewer electron — this is known as a hole. The presence of a missing covalent bond allows the bonded electrons of neighboring atoms to move into the "hole," leaving another hole behind, and in this way a hole can move through the lattice. Thus, it can be said that photons absorbed in the semiconductor create mobile electron-hole pairs.

A photon need only have greater energy than that of the band gap in order to excite an electron from the valence band into the conduction band. However, the solar frequency spectrum approximates a black body spectrum at ~6000 K, and as such, much of the solar radiation reaching the Earth is composed of photons with energies greater than the band gap of silicon. These higher energy photons will be absorbed by the solar cell, but the difference in energy between these photons and the silicon band gap is converted into heat (via lattice vibrations — called phonons) rather than into usable electrical energy.
[edit] Charge carrier separation

There are two main modes for charge carrier separation in a solar cell:

1. drift of carriers, driven by an electrostatic field established across the device
2. diffusion of carriers from zones of high carrier concentration to zones of low carrier concentration (following a gradient of electrochemical potential).

In the widely used p-n junction solar cells, the dominant mode of charge carrier separation is by drift. However, in non-p-n-junction solar cells (typical of the third generation solar cell research such as dye and polymer solar cells), a general electrostatic field has been confirmed to be absent, and the dominant mode of separation is via charge carrier diffusion.

The p-n junction
(to complicated for newbies...)

[trevorbc]

Purvida thanks for that analysis that was (Pur)e poetry! All your hard work is much appreciated. GLTA

[Solar_Express]

Pv19 Great Post :)

Excellent Info about TQ-Dots and Applications..

GLTA..