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On June 9, 2016, the Swiss Federal Institute of Technology in Lausanne (EPFL) announced that it has trial-produced a perovskite solar cell with a unit size of SD card by combining a coating process and a simple vacuum process, with a unit conversion efficiency of more than 20%.
The results have been published in the academic journal Science
.
The perovskite solar cell with the highest unit conversion efficiency is a unit developed by the Korea Chemical Research Institute (KRICT) and Ulsan University of Science and Technology (UNIST) in South Korea, with an efficiency of 22.
1%, but the cell area is very small, only 0.
1cm2
.
This is the first time that a unit conversion efficiency
of more than 20% has been achieved with a large cell size (SD card size).
The team that developed the unit is the research group
of Michael Graetzel, a professor of physical chemistry at the EPFL Photonics and Interface Laboratory, known for developing dye-sensitized solar cells.
Gretzel et al.
first applied perovskite ink as an absorbent layer to a glass substrate using spin-coating technology (YouTube video
).
Then a process called "vacuum flash" is used, in which the ink is crystallized
while vacuuming.
According to EPFL, this method can remove excess components and promote the formation of seed crystals, thereby achieving crystallization
.
In the end, high-quality perovskite crystals
were successfully obtained.
It also aims to achieve a conversion efficiency of more than 30%.
Gretzel predicts that by using a tandem structure of perovskite solar cells combined with existing silicon solar cells, the conversion efficiency can reach more than
30%.
According to him, the theoretical efficiency of such solar cells is as high as 44%.
On June 9, 2016, the Swiss Federal Institute of Technology in Lausanne (EPFL) announced that it has trial-produced a perovskite solar cell with a unit size of SD card by combining a coating process and a simple vacuum process, with a unit conversion efficiency of more than 20%.
The results have been published in the academic journal Science
.
The perovskite solar cell with the highest unit conversion efficiency is a unit developed by the Korea Chemical Research Institute (KRICT) and Ulsan University of Science and Technology (UNIST) in South Korea, with an efficiency of 22.
1%, but the cell area is very small, only 0.
1cm2
.
This is the first time that a unit conversion efficiency
of more than 20% has been achieved with a large cell size (SD card size).
The team that developed the unit is the research group
of Michael Graetzel, a professor of physical chemistry at the EPFL Photonics and Interface Laboratory, known for developing dye-sensitized solar cells.
Gretzel et al.
first applied perovskite ink as an absorbent layer to a glass substrate using spin-coating technology (YouTube video
).
Then a process called "vacuum flash" is used, in which the ink is crystallized
while vacuuming.
According to EPFL, this method can remove excess components and promote the formation of seed crystals, thereby achieving crystallization
.
In the end, high-quality perovskite crystals
were successfully obtained.
It also aims to achieve a conversion efficiency of more than 30%.
Gretzel predicts that by using a tandem structure of perovskite solar cells combined with existing silicon solar cells, the conversion efficiency can reach more than
30%.
According to him, the theoretical efficiency of such solar cells is as high as 44%.
