GRNG Exploratory Sept 26th - Solar Cell Challenge

Photovoltaic cells produce electricity by photons dislodging electrons from n-type semiconductor:

Each individual cell can produce up to 0.5V at 500 mA:

The challenge is to light an LED. An LED has a forward voltage drop of 1.5V to 3.5V, depending upon color, and requires between 15 mA and 35 mA of current:

Direct sunlight has significantly more light intensity than sunlight through a window.

"Green" solutions to energy needs may or may not be the most efficient or eco-friendly....you have to anylyze the complete life-cycle costs, etc.

Determining maximum power efficiency