Quantum efficiency of a solar cell

Have you ever played catch with a ball? Imagine the ball is the sun's light and the catcher is a solar cell.

Now, imagine that the solar cell is really good at catching the ball. This means it can collect a lot of the sun's light and turn it into electricity. We call this "quantum efficiency".

But sometimes, the solar cell isn't that good at catching the ball. Maybe the ball bounces off the catcher's hand or the catcher wasn't paying attention. Similarly, sometimes the solar cell doesn't collect all of the sun's light, and this affects its quantum efficiency.

Quantum efficiency is a measurement of how good a solar cell is at catching the sun's light and turning it into electricity. The higher the quantum efficiency, the better the solar cell is at making electricity from the sun's light. So, it's kind of like how good someone is at catching a ball during a game of catch.