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Technology Stocks : Energy Conversion Devices -- Ignore unavailable to you. Want to Upgrade?

To: alfranco who wrote (7674)	5/10/2004 12:40:13 PM
From: Krowbar	Read Replies (1) \| Respond to of 8393

Al, There is a figure 1 table about 3/4 of the way down the patent. I'll try to reproduce it here. Sample 5-147 is the control, and the rest are modified. (note that SI's editor will not allow me to space the numbers, but the 70 numbers belong under the min.) TABLE 1 Formation Step Reactant H.sub.2 Treatment Total Volume Ratio Step Time Thickness Sample SiH.sub.4 :H.sub.2 Time (s) Time (s) (min) (nm) 5-147 Pure SiH.sub.4 -- 0 8 44.65 5-146 1:10 1 4 70 47.8 5-148 1:10 1 2 70 83.2 5-149 1:10 2 2 33 60.2 This describes treatment with hydrogen, but fluorine is also mentioned as an alternative. Also this treatment does not result in a completed layer. I also have trouble getting images from the USPTO site. sometimes I get them, and sometimes it locks my computer up. Del

To: alfranco who wrote (7674)	5/11/2004 12:16:28 PM
From: Krowbar	Read Replies (1) \| Respond to of 8393

Al, I wonder how applicable this discovery will to our new process. ECD has mastered the art of making nanocrystals, but our latest patent described working with silicon nanocrystals.......... LOS ALAMOS, N.M., April 30, 2004 -- University of California scientists working at Los Alamos National Laboratory have experimentally demonstrated a phenomenon in which semiconductor nanocrystals respond to photons by producing multiple electrons. The innovation has potential applications in a new generation of solar cells that would produce as much as 35 percent more electrical output than current solar cells. In a paper published today in the journal Physical Review Letters, Laboratory scientists Richard Schaller and Victor Klimov describe their observations of high efficiency carrier multiplication in nanoparticles of less than 10 nanometers in diameter made from lead and selenium (PbSe nanocrystals). Upon illumination with light at the green-blue end of the spectrum, these nanocrystals react to absorbing solar photons by producing twice the electrons of conventional bulk semiconductors through a process known as carrier multiplication. This increase in the number of electrons being produced can lead to a greater electrical current output from solar cells. lanl.gov Del