Solar cells are made up of two main layers, the back layer and the front layer. Boron nitride makes up the back layer in most solar panels, which scatter light from one cell to another. Moreover, it is essential for making silvery solar cells that are used to generate electricity.
These substances are also useful as a raw material for optical equipments, ceramics, alloys, pharmaceuticals and fuel. It is so very essential for these uses that boron-containing compounds have been called "the white petroleum." Borates have also been called "miracle materials" because of their many industrial applications.
More often, they have been extensively combined with silicon wafers to create solar panels because they can work in the high temperatures encountered when producing clean energy from the sun's light. This is because, it reacts with the sunlight to release electrons, which carries an electric current.
You can read more about its benefits as a clean fuel, the other types of clean fuels and more from this website. https://borates.today/clean-fuels-using-boron-for-a-cleaner-future/