Solar-powered Sunglasses: Cheat Sheet
Stuff You Need to Know:
- These Self-Energy Converting Sunglasses (SIG) are able to absorb solar energy through special lenses coated with dye-sensitizing solar cells (DSC). In addition to being used as a glass-coating dye, these cells can also be turned into low-cost, lightweight, transparent and flexible sheets.
- Solar cells are engineered in two layers: a photosensitive layer made of ultrathin, nano-sized semiconductor crystals over a thin layer of titanium dioxide. When photons from the sun's rays are absorbed by the photosensitive layer, electrons accumulate on the titanium dioxide, creating an electrical current.
- When solar cells absorb the sun's rays and convert sunlight into electrical energy, it's called photovoltaics. What's released? Nothing more than electrons.