Reddit reviews SunLabz Solar Charger Backpack (7w) INCLUDING 10,000 mAh Power Bank and 1.8L Hydration Pack

Here is a How It's Made video that discusses how the standard solar panels you have probably seen already are made. Notice the core of the panel is silicon crystals. The silicon crystals are doped with other elements (often Phosphor and Boron) to create PN junctions. These PN junctions absorb light and create excited electrons. If you connect these panels to an electronic circuit the electrons will flow out of the panels as electrical power (I am omitting details here).

The key issue is that the silicon panels are a rigid, brittle crystals. You could make a "flexible" solar panel by increasing the space between the cells and connecting them with some sort of flexible material. However, this would have wasted space and the panels would still be at risk of cracking if you apply too much pressure or twist them too much.

Also note that the panels are often opaque. This is because silicon crystals are opaque. If you could reduce the thickness of the crystals significantly you could make the transparent, but they would also absorb less light and produce less power.

For both of these reasons, silicon-based solar panels have not been turned into windows or wearable tech (outside of solar backpacks).

A better solution would be to make flexible or transparent solar cells, which means you need to make flexible P-N junctions. There is ongoing research into organic solar cells (typically made out of carbon-based polymers). The problem is that *most* polymers are insulators, so they make bad semiconductors. Some polymers are conductors. However, the key is research into semiconductive polymers. The resulting solar cells are called organic solar cells and as of writing I am not aware of any commercially successful implementations.

https://www.amazon.com/SunLabz%C2%AE-Charger-Backpack-INCLUDING-Hydration/dp/B00YV6WY44/ref=sr_1_1?ie=UTF8&qid=1468346518&sr=8-1&keywords=10%2C000+MAH+solar+backpack

Thank you for your suggestions so far you have been very helpful!!! So how about this, scratch all the stuff on the list and instead focus on providing free portable electricity to the homeless. So now here are my options, what would work the best?

1. A backpack with an attached solar panel (it will always be in the sun if you are wearing it and will be able to charge much more than just a cell phone) I am worried on this one though if the solar panel would be too visible and someone might get robbed for the backpack?
   https://www.amazon.com/dp/B00V0ZB7XI/ref=cm_sw_r_cp_apa_6mA2xbGGD1CPX
   
2. A portable solar cell phone charger
   https://www.amazon.com/dp/B01ILT5LNM/ref=cm_sw_r_cp_apa_MjA2xbPKFMD4N
   
3. A portable solar panel - this would charge the most even a laptop but it would be less portable because of the size
   https://www.amazon.com/dp/B00TEQJEC6/ref=cm_sw_r_cp_apa_ulA2xbNA6Q1VX
   
4. A smaller backpack with a removable solar panel and a built in hydration bag
   https://www.amazon.com/dp/B00YV6WY44/ref=cm_sw_r_cp_apa_WaA2xbHF3AMYQ
   
   Also backpacks will come with a loaf of bread, deli meat and Mayo/mustard and a survival/resource guide.

Actually, there are backpacks out there that come fitted with solar panels and can charge USB devices. Guessing that you'd have to get something to regulate the current, and then make a connection point outside the blaster, possibly inside the battery door, to connect the LEDS to the backpack. You could also have a LiPo somewhere along the line to store extra electricity.
Example of Solar Panel Backpack:
https://www.amazon.com/Backpack-Hydration-Ergonomic-Carrying-SunLabz/dp/B00YV6WY44