Hybrid Car – More Fun with Less Gas

Would you like solar cells with various colours? - Page 2

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Posted by coj on July 14, 2009, 8:07 am
LU Wei wrote:

If you've increased the reflectivity to change the colour of a cell then
it will lead to a drop in current in a cell and also a module. You might
get a slight encapsulation drop when laminating the module but you won't
get an extra reflectivity drop. Your new module power should be close to
the ratio of your cell efficiencies 16.5/16.9.


Posted by LU Wei on July 15, 2009, 3:19 am
coj wrote on 2009-7-14 16:07:

It will not be the case because there is a match problem between the SiN
coating and laminate coating. The reflectivity ratio of gold and blue
cell may be 16.5/16.9 (if we omit other factors), but the reflectivity
ratio of gold and black module will surely be less than that.

LU Wei

Posted by LU Wei on July 15, 2009, 6:26 am
 LU Wei wrote on 2009-7-15 11:19:

Sorry for my mistake: the reflectivity ratio should be 16.5/16.9 +
(1-16.5/16.9)/0.05 ~= 1.45 (if we let the reflectivity of blue cell to
be 5%);

And the reflectivity ratio of gold and black module will surely be
higher than that (greater than 1, anyway).

LU Wei

Posted by Doc O'Leary on July 14, 2009, 4:20 pm

Keep in mind that there is even potential to use the reflected light for
solar thermal in a hybrid system.  If it's not diffuse reflection, I
could easily see making a fresnel mirror out of gold panels.  Heck, it
might even be worth more significant drops in PV efficiency if you could
put out silver panels!

My personal UDP list:, localhost, googlegroups.com, ono.com,
    and probably your server, too.

Posted by LU Wei on July 15, 2009, 3:25 am
 Doc O'Leary wrote on 2009-7-15 0:20:

Your suggestion of hybrid system is valuable yet I think we still have
no R&D ability and investment in this area. Anyway, silver panel is not
practical -- it will reflect too much light!

LU Wei

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