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Tuesday, October 26, 2021

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Scientists develop new, more efficient, transparent electrode for solar cells

A team of international scientists has discovered a way to combine semi-transparent Perovskite Solar Cells with commonly used Silicon Cells and increase the efficiency and effectiveness of both types, using new thin metal electrodes.

The research is expected to lead to the development of fully transparent solar cells, saying, “Transparent solar cells will one day generate solar power in the windows of homes and office buildings. This is a long leap – we have finally been able to create efficient semi-transparent solar cells, ”said Kai Wang, an assistant professor of material science and engineering at Penn State University.

They point out that commonly used solar cells are made of silicon and placing Perovskite cells on them provides a better efficient alternative.

“We have shown that electrodes can be created using several very thin layers of gold atoms. The gold layer thus created has a high electrical conductivity, so it does not interact with other surrounding cells with the ability to absorb solar energy. ” – Shashank Priya, Assistant Vice President and Professor of Research and Professor of Materials Science and Engineering, Penn State University.

Scientists further reported their findings in the journal Science Direct, which found that their team’s enhanced perovskite cells alone reached an efficiency of 19.8%, compared to the average efficiency of 23.3% when using Silicon Solar cells alone. Combining the two gives an efficiency of 28.3%.

“Increasing efficiency by 5% is a huge improvement,” he said. Prof. Priya has stated.

In previous experiments, scientists said that very thin gold films showed signs of being a transparent electrode in Perovskite cells, but their conductivity was weakened due to problems with the formation of a uniform layer.

However, research on this has been going on for a long time and the previous research at the University of Northern Illinois in the United States can also be found at the link below.

In this research, the research team found that using chromium as a base source layer leads to the formation of a continuous, very thin layer of gold with good conductive properties.

Gold thin layer with chromium
These Perovskite solar cells are manufactured in five layers, and tests on their durability and efficiency have shown that they can maintain excellent performance over a long period of time.

Finally we can see solar panels installed on buildings and windows in the near future as well as hope that the concept of Green Energy Renewable Energy will become a reality.

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