Toshiba: Developed Cu2O solar cell: Power generation efficiency 8.4%
-Transmissive Cu2O solar cell-
January 27, 2022
Toshiba:
We have developed a transmissive Cu2O solar cell with a power generation efficiency of 8.4% for tandem solar cells.
Transmissive Cu2O solar cell:
I made this battery the top cell,
When a tandem solar cell is installed in an EV,
It can run 35km per day without charging.
Conventional tandem solar cells:
Conventionally, with Cu2O used in the top cell,
CuO / Cu impurities in Cu2O crystals reduce power generation efficiency and light transmission.
This time, impurities in Cu2O are removed:
Toshiba detected and quantified trace impurities in the Cu2O power generation layer by the X-ray diffraction method.
Specify the film formation conditions so that impurities are minimized,
It has both excellent power generation characteristics and light transmission.
We have developed a transmissive Cu2O solar cell.
Overall power generation efficiency is 27.4%:
The estimated value of power generation efficiency exceeds the world’s highest value.
This transmissive Cu2O solar cell,
When stacked on a Si solar cell with a power generation efficiency of 25%
The overall power generation efficiency reached 27.4%.
This value exceeds the world’s highest efficiency of 26.7% for Si solar cells as of December 2021. It was
Toshiba Energy Systems:
We have started the development of a large Cu2O solar cell that is the same size as the mass-produced Si solar cell.
2023
Started supplying large Cu2O solar cells and samples for external evaluation.
2025
Establish manufacturing technology for practical size Cu2O / Si tandem solar cells.
–EDN Japan