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✅Double-sided perovskite solar panels will increase the energy output of modules by 20% at a lower cost
According to a new study, sunlight reaches both sides of the bilateral perovskite solar cell, which means that it can potentially give a higher energy output at lower overall costs.
Double-sided solar cells capture direct sunlight in front and reflected sunlight at the back. As a result, according to a study by the U.S. Department of Energy National Renewable Energy Laboratory (NREL), they surpass unilateral solar cells.
"This perovskite cell can work very effectively from any side," said Kai Zhu, a senior researcher at the Center for Chemistry and Nanosciation at NREL.
In past studies, bilateral solar cells could not compete with one-sided elements, the effectiveness of which is currently 26%. According to NREL researchers, ideally a bilateral cell should have anterior efficiency close to the most effective one-sided cell and similar inverse efficiency.
The researchers were able to create a solar cell in which the effectiveness of both sides was comparable. Laboratory measured efficiency of front lighting exceeded 23%, and the efficiency of rear illumination was about 91-93% of the front illumination.
The researchers found that the layer of perovskite on the front of the cell should be thick enough to absorb most of the photons from a certain part of the solar spectrum, but too thick a layer of perovskite can block photons.
The NREL team also needed to find out the ideal thickness of the rear electrode on the back of the element to minimize resistive losses. Using the simulation, the team found that the ideal thickness of the perovskite layer is about 850 nanometers. Compare this to a strand of human hair about 70,000 nanometers thick.
They then placed a double-sided cell between two solar simulators and directed direct light to the front side, while the back side received reflected light. The efficiency of the cell increased as the ratio of reflected light to front lighting increased.
The Study Group notes that a double-sided perovskite solar module will cost more than a single-sided one-sided, but the higher initial cost will be offset by increasing the power of double-sided modules by 10-20%.
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According to a new study, sunlight reaches both sides of the bilateral perovskite solar cell, which means that it can potentially give a higher energy output at lower overall costs.
Double-sided solar cells capture direct sunlight in front and reflected sunlight at the back. As a result, according to a study by the U.S. Department of Energy National Renewable Energy Laboratory (NREL), they surpass unilateral solar cells.
"This perovskite cell can work very effectively from any side," said Kai Zhu, a senior researcher at the Center for Chemistry and Nanosciation at NREL.
In past studies, bilateral solar cells could not compete with one-sided elements, the effectiveness of which is currently 26%. According to NREL researchers, ideally a bilateral cell should have anterior efficiency close to the most effective one-sided cell and similar inverse efficiency.
The researchers were able to create a solar cell in which the effectiveness of both sides was comparable. Laboratory measured efficiency of front lighting exceeded 23%, and the efficiency of rear illumination was about 91-93% of the front illumination.
The researchers found that the layer of perovskite on the front of the cell should be thick enough to absorb most of the photons from a certain part of the solar spectrum, but too thick a layer of perovskite can block photons.
The NREL team also needed to find out the ideal thickness of the rear electrode on the back of the element to minimize resistive losses. Using the simulation, the team found that the ideal thickness of the perovskite layer is about 850 nanometers. Compare this to a strand of human hair about 70,000 nanometers thick.
They then placed a double-sided cell between two solar simulators and directed direct light to the front side, while the back side received reflected light. The efficiency of the cell increased as the ratio of reflected light to front lighting increased.
The Study Group notes that a double-sided perovskite solar module will cost more than a single-sided one-sided, but the higher initial cost will be offset by increasing the power of double-sided modules by 10-20%.
Return to Updates
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