The skin of a solar cell is 1000 times thinner than a human hair and serves the functions of conducting electricity and protecting the cell.
In a statement, the team said this could make solar technology more efficient and accessible.
Lead researcher Dr Hieu Nguyen said: “Hydrogen is the lightest element in the periodic table but extremely powerful for healing ‘wounds’ in semiconductor materials.
The researchers also found that the skin can emit light which has some distinct characteristics.
“When you start with high-quality silicon materials, there is limited room for improving the cell body. Thus, improving the skin layer is a very critical step for achieving highly-efficient solar cells,” doctoral candidate Thien Truong said.
"These discoveries will definitely help produce more robust and more efficient silicon solar cells since we now know how to manipulate this hydrogen content inside the skin to have a better solar cell.”
Dr Nguyen said this technology was likely to replace traditional solar cell technology in coming years.
“If you look at a lot of solar panels around now, many of them are already 20 or 30 years old, but now the new technology’s going to be shifting to this type of cell architecture," he said.
“Our discoveries will provide engineers and scientists with a powerful tool to study and improve the efficiency of this solar cell technology."