No 8. Jellyfish

Jellyfish that glow in the dark contain ingredient for a new kind of fuel. They inherit their ability to glow from green fluorescent protein or GFP. A team of scientists at The Chalmers University of Technology in Gothenburg, Sweden placed a drop of GFP onto aluminum electrodes and then exposed that to ultraviolet light which produced electricity in a connected circuit.
Similarly scientists have successfully extracted electricity from a mixture of chemicals such as magnesium and luciferase enzymes, which are found in fireflies.

No 7. Carbon nanotubes

If something will revolutionize solar energy, it is the Carbon nanotubes. These are hollow tubes of carbon atoms that are used in armor-like fabrics and can be used in interplanetary elevators too. Recently, scientists from MIT successfully captured more energy using carbon tubes than 100 regular photovoltaic cells would capture. The nanotubes could work as antennas to capture and funnel sunlight onto solar arrays. What this means is that in the future you wouldn’t need your whole rooftop covered with fragile material to power your home, you might be using a much smaller space instead.