Researchers at WarwickUniversity in the UK say they can replace lead with tin to produce an environmentally friendly perovskite solar cell without making any difference to the product's efficiency or performance.
Tin is a cheaper alternative and tin-based perovskite cells could accelerate the deployment of the technology in a range of solar applications, the team claims in a paper published in The journal Nature Energy. Tin perovskite materials are more stable, cheaper and safer than previously thought, which has the important advantage of reducing manufacturing costs and making them more commercially attractive.
According to the researchers, perovskite photovoltaic devices that do not require a pore sorting interface are about 10 times more efficient than those based on methyl lead iodide perovskite structures. The current maximum efficiency of CsSnl3 pv cells is 3.56%.
This study has demonstrated an improvement in the performance and pore resistance of nitrogen-based SnCl2 fullerene electron transport layer perovskite films, while the stability of unencapsulated CsSnI3 is improved by at least one order of magnitude compared to lead perovskite pv. These findings prove the value of further research on tin perovskite pv.
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