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Solar Cells — Made In a Pizza Oven
stylemessiah writes "The winner of several Eureka Science Awards in Australia is a crafty chick who devised a way to create solar cells cheaply using a pizza oven, nail polish and an inkjet printer. This was developed to address the high cost of cells and in particular for the world's poorest regions. She wanted to give the ~2 billion people around the world who don't have electricity the gift of light and cheap energy. This could have profound (and a good profound) implications for education and health in those in the poorest regions in the world. And it all started with her parents giving her a solar energy kit when she was 10..."
When asked to describe the process she says "To pattern the cell we spray on something like nail polish and then inkjet print a kind of nail polish remover which lets us etch certain parts of the wafer. This creates a metallisation pattern so we can deposit aluminium on the back surface of the solar cell and create our metal contacts to both the P and N-type silicon simultaneously using a very cheap, low temperature pizza oven! And hey presto we've created a simple, low-cost solar cell without having to use expensive high tech equipment or high temperature processes!"
(from here)
In most Australian Universities the postgraduate student owns the IP. I can't find the equivalent for UNSW, but here is the University of Sydney's policy (a close competitor to UNSW). It is quite clear that by default postgraduate students own their results.
I don't know what part of the world the submitter is from, but round here (South Africa) calling someone a "chick" is no more or less offensive or degrading than calling a man a "guy". Minor cultural difference, but it does make a lot of these "OMG Sexism" comments a bit confusing.
Get back in the kitchen and cook me a solar cell!
It would be nice if the article told us how it works ... if she has a way to get past transparent conductive oxide layers I would certainly be interested in hearing about it. Zinc Oxide deposition onto glass substrates is used for the black currant solar cell.
I like how that technique is being heralded by a company named Mansolar....
Well - reading the fucking article again, I did notice this ...
"While it could take five years to commercialise the patented technology"
Am I being an asshole for pointing out the irony of wanting to commercialize DIY solar cell technology?
""I love working with passionate people who want to help address climate change and poverty by thinking and experimenting outside the square," she said."
That reminds me of an episode of Pinky and the Brain. Something about Brain wanting to take over the world for the good of all man kind, and chanting kumbaya with a bunch of hippies... :-)
And are they talking about an electric pizza oven or a brick oven pizza oven? I imagine one would be depositing carbon all over the place ... which could help in some cases. The black currant technique requires a layer of graphite to be applied for the anode I think...
Your resident /. manarchist,
afxgrin
Here are more details:
A typical photovoltaic cell is made of a thin boron doped P-type (P for positive) silicon wafer with positively charged 'holes' (missing electrons). [...] Metal contact is made to both the P and N-type silicon allowing electrons to flow out of the N-type silicon [...]
Unfortunately photovoltaic cells are expensive to produce, as you traditionally need access to elaborate, clean' manufacturing plants [...]
Nicole has spent the last two years researching an alternative manufacturing process [...] Using Inkjet printing, aluminium spray and a pizza oven, Nicole has created metal contacts to both the negative and positive sections of a solar cell
"[...] we spray on something like nail polish and then inkjet print a kind of nail polish remover which lets us etch certain parts of the wafer. This creates a metallisation pattern so we can deposit aluminium on the back surface of the solar cell and create our metal contacts to both the P and N-type silicon simultaneously using a very cheap, low temperature pizza oven!
from http://www.amonline.net.au/eureka/index.cfm?objectid=A4D69CF1-9890-B67D-2409EF3BFCD8F038&DISPLAYENTRY=true
I assumed that producing ultra-pure silicon wafers was the most expensive part about making solar cells, but I guess this would also help.
Obama likes poor people so much, he wants to make more of them.
"[...] we spray on something like nail polish and then inkjet print a kind of nail polish remover which lets us etch certain parts of the wafer. This creates a metallisation pattern so we can deposit aluminium on the back surface of the solar cell and create our metal contacts to both the P and N-type silicon simultaneously using a very cheap, low temperature pizza oven!
AHHAHAhhahahahaaaaaa.
I know what's going on. The above is "dumbed down" for the reporter, who has reported it "faithfully" - and now everyone is assuming she *actually* used nail polish, an inkjet printer, and a pizza oven. She didn't use ANY of those. She used a full blow IC Fab - the above sounds exactly like a regular old wafer etch step, just with metal instead of silicon and an "inket LIKE" application of the photoresist before the acid etch!
Ahhahhahahahaa. (wipes tear) You Loosers.