As technology becomes increasingly efficient and cheap, the solar photovoltaic panel industry in the green energy industry has also welcomed vigorous development. Recently, however, a team at the Australian National University (ANU) has just broken the energy efficiency record for solar batteries. The researchers say they have developed a new type of calcium-titanium-silicon series solar cell with an energy conversion efficiency of 27.7 percent.
(Photo from: Stuart Hay / ANU)
You know, five years ago, the industry record was only 13.7%. Even at 25.2% two years ago, AUN’s new program has grown considerably and has the potential to continue to break through in the coming years.
By contrast, most commercial solar cells based on silicon are now generally around 20% efficient. But given that both silicon and calcium titanium are good at converting solar energy, the ANU team decided to combine them.
It is reported that the two materials can absorb different wavelengths of light, of which silicon materials are mainly for red and infrared light, and calcium titanium ore mainly facing blue and green light.
To take full advantage of this feature, the researchers stacked the translucent calcium-titanium ore component sits on top of the silicon component.
Kylie Catchpole and The Duong (pictured: Stuart Hay / ANU)
In other words, the sun’s light is filtered out by the energy of the blue-green band, and then the energy in the red and infrared bands is absorbed. Such a design allows the top
Layer design becomes more efficient.
Lead researcher The Duong noted that it used a new material, athain bromide, a new material, to coat the active layer of calcium-titanium ore on photovoltaic panels, characterized by a two-dimensional arrangement.
This material helps reduce defects on the surface of the active layer of calcium titanium ore, thereby improving the performance of these photovoltaic panels. The research team is actively improving efficiency and catching up with the commercialization process, with a 30 percent conversion rate target expected by 2023.
Details of the study have been published in the recent journal Advanced Energy Materials.
Originally published as High Efficiency Perovskite-Silicon Tandem Solar Cells: Effect of Surface Coating versus Bulk Corporation of 2D Pero vskite.