Scientists in Germany and China have developed an additive which greatly improved the performance of a tin-based perovskite solar cell. Cells fabricated with the additive reached 9.1% efficiency, and the researchers say their work opens up many new possibilities to improve the performance of lead-free perovskites.
Without globally unified standards in waste management, the risk from toxic materials such as lead will become increasingly important.
Lead plays an important role in crystalline silicon module manufacturing when it comes to cell interconnection. But even in small amounts, the presence of this toxic material in a PV module could be viewed as a black mark against the industry’s sustainable credentials. Alternatives are available, but it seems the price is not yet right for broader uptake.
A team of scientists from the Korea Advanced Institute of Science and Technology (KAIST) has proposed a gold-based halide perovskite as a material for high efficiency solar cells, which it says could be both more stable and more environmentally friendly to produce than many existing perovskites which scientists are investigating to boost solar efficiency.
Scientists led by Brown University have developed perovskite solar cells, which replace the toxic lead common to many of these material structures with titanium. The researchers say that with further optimization, the material could eventually be ideal for use as a tandem cell layer.
A joint project conducted by the Carinthian Tech Research Center and the Austrian Institute of Technology, in conjunction with German equipment manufacturer teamtechnik has developed a lead-free PV system using glued ribbon technology.
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