Imagine you want to fabricate a triple junction solar cell that consists of three quantum dot-based solar cells (see figure below). Each cell consists of quantum dots of a certain diameter: 4nm, 6nm and 10nm. In which order (from top to bottom) would you put these cells in order to absorb the most part of the solar spectrum?

A. First, the 4 nm cell on the top. Then, the 6 nm cell. Finally, the 10 nm cell on the bottom.
B. First, the 6 nm cell on the top. Then, the 10 nm cell. Finally, the 4 nm cell on the bottom.
C. First, the 10 nm cell on the top. Then, the 6 nm cell. Finally, the 4 nm cell on the bottom.
D. First, the 10 nm cell on the top. Then, the 4 nm cell. Finally, the 6 nm cell on the bottom.