Operation of a three terminal solar cell for children

The video describes in a simple manner the operation of a three terminal solar cell. Blue arrows represent the high energy photons. Red arrows represent the low energy photons, that are absorbed deeper in the cell. Each colored square represents a semiconductor layer. White balls, represent electrons. Black ball represent holes. For a more detailed description of a particular kind of three terminal solar cell, see for example:

 A. Martí and A. Luque, “Three-terminal heterojunction bipolar transistor solar cell for high-efficiency photovoltaic conversion,” Nat. Commun., vol. 6, pp. 6902–6902, Apr. 2015.  (https://doi.org/10.1038/ncomms7902)

The video has been created in Blender 2.82. (https://www.blender.org/). Both the video and the source file with which we created it are attached