Semiconductor Materials
Semiconductor Materials are solids that conduct electricity only part of the time, like silicon in solar cells.
A flat tray holds two layers of small balls. The bottom layer sits packed tight with no room to move — the balls are locked in place. The top layer has a few loose balls that can slide around when pushed. When you warm the tray, more balls pop up from the bottom and join the top, so flow picks up.
Explaining semiconductor materials by grade level
Some things let power flow through them all the time. Some things never do. A solar cell is made of stuff in between. It only lets power flow when light shines on it.
Projects that explore semiconductor materials
Silicon is a semiconductor — it conducts electricity only part of the time, and temperature affects how well it performs. You investigate by exposing a solar cell to different temperatures and measuring the voltage in millivolts, the current in milliamps, and the power in watts. Power is higher at lower temperatures, showing that heat changes how well the cell conducts electricity.
Semiconductor materials like silicon in solar cells conduct electricity only part of the time, and temperature affects how well they perform. When a solar panel heats up quickly on a sunny day, that rising temperature may lower its electrical output. The fan-cooled cell produces the most power because keeping the semiconductor cool lets it conduct electricity more effectively.