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Researchers at the University of New South Wales (UNSW) in Australia have once again broken the energy efficiency record of photovoltaic cells, increasing the solar energy conversion efficiency to a staggering 34.
5%.
Previously, Alta Devices in the United States had set a record conversion rate of 24%, but the new device built by Mark Keevers and Martin Green, senior researchers at the Australian Advanced Optoelectronic Center under UNSW, has improved performance a lot
.
In 2014, they used mirrors to concentrate light and freeze the conversion rate at more than
40%.
However, this time, the new device did not "cheat", but achieved this achievement
under normal lighting conditions.
Keevers said in a statement: "This encouraging result shows that our research in the field of photovoltaic power generation is still advancing, which can make solar cells more efficient"
.
"By converting each beam of light into as much energy as possible, it is extremely important to reduce the cost of solar power generation, because it reduces the investment required and the return on investment comes faster.
"
The new device consists of four mini-modules (28cm2 in size) embedded in the prism, which are divided into four segments to input to the quadruple receiver when sunlight hits the prism, increasing the energy
that can be obtained from sunlight.
On one side of the glass prism is a silicon cell; On the other side, there are triple-junction solar cells
.
This solar cell has three layers, each corresponding to different light waves, which can make the most efficient use of light energy, and the remaining light energy will be transmitted to the next layer, and eventually the infrared light wave will be screened out and bounced back to the silicon photocell
.
Unfortunately, the current prototype is not suitable for large-scale use on rooftops due to the complexity of the structure and the high cost of mass production, but the team is working to reduce its complexity
.
At the same time, the researchers plan to expand the scale of the device to a larger
scale.
For example, Alta Devices' photovoltaic cells have an area of 800cm2
.
If UNSW's new installation can also reach this scale, it is expected to further reduce marginal losses
.
"The industry has not been able to achieve this level of efficiency for many years, and a recent study by Agora Energiewende in Germany also believes that it will be 35% efficient and home applications for non-focused solar harvesting modules by 2050," Green said.
Researchers at the University of New South Wales (UNSW) in Australia have once again broken the energy efficiency record of photovoltaic cells, increasing the solar energy conversion efficiency to a staggering 34.
5%.
Previously, Alta Devices in the United States had set a record conversion rate of 24%, but the new device built by Mark Keevers and Martin Green, senior researchers at the Australian Advanced Optoelectronic Center under UNSW, has improved performance a lot
.
In 2014, they used mirrors to concentrate light and freeze the conversion rate at more than
40%.
However, this time, the new device did not "cheat", but achieved this achievement
under normal lighting conditions.
Keevers said in a statement: "This encouraging result shows that our research in the field of photovoltaic power generation is still advancing, which can make solar cells more efficient"
.
"By converting each beam of light into as much energy as possible, it is extremely important to reduce the cost of solar power generation, because it reduces the investment required and the return on investment comes faster.
"
The new device consists of four mini-modules (28cm2 in size) embedded in the prism, which are divided into four segments to input to the quadruple receiver when sunlight hits the prism, increasing the energy
that can be obtained from sunlight.
On one side of the glass prism is a silicon cell; On the other side, there are triple-junction solar cells
.
This solar cell has three layers, each corresponding to different light waves, which can make the most efficient use of light energy, and the remaining light energy will be transmitted to the next layer, and eventually the infrared light wave will be screened out and bounced back to the silicon photocell
.
Unfortunately, the current prototype is not suitable for large-scale use on rooftops due to the complexity of the structure and the high cost of mass production, but the team is working to reduce its complexity
.
At the same time, the researchers plan to expand the scale of the device to a larger
scale.
For example, Alta Devices' photovoltaic cells have an area of 800cm2
.
If UNSW's new installation can also reach this scale, it is expected to further reduce marginal losses
.
"The industry has not been able to achieve this level of efficiency for many years, and a recent study by Agora Energiewende in Germany also believes that it will be 35% efficient and home applications for non-focused solar harvesting modules by 2050," Green said.
