Heterojunction solar cell technology (HJT) has revolutionised the way we think about solar energy. The cells are made from two materials, crystalline silicon and amorphous thin-film silicon, to create a ‘sandwich’ effect, layered on top of each other and separated by a thin layer of intrinsic amorphous silicon. This combination allows for better charge carrier separation and collection, resulting in a more efficient capture of sunlight and transfer of electrons
in general, a higher energy conversion rate potential, and a better
outcome for homeowners and businesses.
One of the key advantages of HJT technology is its ability to minimise energy loss caused by recombination. Recombination occurs when the positive and negative charges within a solar cell come back together, releasing energy in the form of heat instead of electricity. By reducing such recombination thanks to the good passivation by hydrogenated amorphous silicon, HJT cells can achieve higher efficiency levels compared to traditional silicon-based solar cells.