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Home > Press > Shedding light on perovskite films: Efficient materials for future solar cells - New model to determine photoluminescence quantum efficiency
In terms of efficiency, perovskite solar cells have caught up on silicon solar cells, but some of their properties are not yet understood completely.
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Markus Breig, KIT
Abstract:
Photovoltaics decisively contributes to sustainable energy supply. The efficiency of solar cells in directly converting light energy into electrical energy depends on the material used. Metal-halide perovskites are considered very promising materials for solar cells of the next generation. With these semiconductors named after their special crystal structure, a considerable increase in efficiency was achieved in the past years. Meanwhile, perovskite solar cells have reached an efficiency of up to 25.5 percent, which is quite close to that of silicon solar cells that are presently dominating the market. Moreover,
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IMAGE: In terms of efficiency, perovskite solar cells have caught up on silicon solar cells, but some of their properties are not yet understood completely. view more
Credit: Markus Breig, KIT
Photovoltaics decisively contributes to sustainable energy supply. The efficiency of solar cells in directly converting light energy into electrical energy depends on the material used. Metal-halide perovskites are considered very promising materials for solar cells of the next generation. With these semiconductors named after their special crystal structure, a considerable increase in efficiency was achieved in the past years. Meanwhile, perovskite solar cells have reached an efficiency of up to 25.5 percent, which is quite close to that of silicon solar cells that are presently dominating the market. Moreover, the materials needed for perovskite solar cells are rather abundant. The solar cells can be produced easily and at low cost and they can be used for various appli
Efficient Materials for Future Solar Cells – New Model to Determine Photoluminescence Quantum Efficiency
In terms of efficiency, perovskite solar cells have caught up on silicon solar cells, but some of their properties are not yet understood completely. (Photo: Markus Breig, KIT)
Perovskite semiconductors are considered promising materials for solar cells of the next generation. Suitability of a semiconductor for photovoltaics is reflected among others by the so-called photoluminescence quantum efficiency. Researchers of Karlsruhe Institute of Technology (KIT) have now developed a model, by means of which photoluminescence quantum efficiency of perovskite films can be determined exactly for the first time. This is reported in Matter (DOI: 10.1016/j.matt.2021.01.019).
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Credit: Photo: IMT/KIT
Use of waste heat contributes largely to sustainable energy supply. Scientists of Karlsruhe Institute of Technology (KIT) and T?hoku University in Japan have now come much closer to their goal of converting waste heat into electrical power at small temperature differences. As reported in
Joule, electrical power per footprint of thermomagnetic generators based on Heusler alloy films has been increased by a factor of 3.4. (DOI: 10.1016/j.joule.2020.10.019)
Many technical processes only use part of the energy consumed. The remaining fraction leaves the system in the form of waste heat. Frequently, this heat is released into the environment unused. However, it can also be used for heat supply or power generation. The higher the temperature of the waste heat is, the easier and cheaper is its reuse. Thermoelectric generators can use waste heat of low temperature for direct conversion into electrical power. Thermoelectric materials used so far, however,