Researchers achieved a record 25.7% efficiency with a tandem solar cell combining perovskite and organic layers, offering a lower carbon footprint.
Researchers have set a new benchmark in solar technology, achieving a record-breaking power conversion efficiency of 25.7 percent for a perovskite-organic tandem solar cell . The innovative cell combines a wide-bandgap perovskite bottom cell with a narrow-bandgap organic top device, marking a significant advancement in the pursuit of more efficient solar energy solutions.
By combining a treated perovskite layer with an organic layer that has a narrow bandgap of 1.27 eV, the resulting perovskite–organic solar cell achieved a power conversion efficiency of 26.4 percent, which has been certified at 25.7 percent. According to researchers from the University of Potsdam in Germany and the Chinese Academy of Sciences, using an organic cell as the bottom layer is also better for the environment, as it has a lower carbon footprint.In recent years, perovskite has become a popular choice for tandem solar cells , which combine two types of cells to break the efficiency limit of single-junction solar cells. Perovskite–organic TSCs are gaining attention because they use a wide-bandgap perovskite solar cell as the front layer and a narrow-bandgapsolar cell as the back layer. These cells offer good stability and the potential for high power conversion efficiency . The overall performance of the TSCs may be lowered by the wide-bandgap perovskite cells’ propensity to lose more voltage than conventional perovskite cells. The recombination of charges at the interface between the C60 layer and the perovskite is a significant obstacle.Researchers claim that creating efficient techniques to lessen this interfacial recombination is essential to enhancing the functionality and efficiency of perovskite–organic TSCs. To achieve this, the group applied a fresh layer of passivation to the perovskite, which lowers material flaws and improves the cell’s overall functionality.substrate, a perovskite absorber with an energy bandgap of 1.88 eV, and a transparent-conductive-oxide layer with a self-assembled monolayer. They added a new passivation layer to improve efficiency, along with an interconnecting layer and an organic absorber with a 1.27 eV energy bandgap., the design also features a PDINN cathode interlayer, which helps improve the interface between the active layer and the top electrode, and a silver electrode for electrical conductivity. The team employed cyclohexane 1,4-diammonium diiodide as a surface passivator to further improve the cell’s performance. The two isomeric forms of this chemical exhibit distinct surface behaviors. This increases the efficiency of the perovskite cell by lowering the voltage mismatch.The tandem solar cell demonstrated an impressive 26.4 percent power conversion efficiency under conventional test conditions, with a verified efficiency of 25.7 percent. Researchers claim that the outcome establishes a new global standard for this kind of solar cell technology and shows how perovskite–organic tandem cells may be used to produce solar energy solutions that are more effective.Jijo is an automotive and business journalist based in India. Armed with a BA in History from St. Stephen's College, Delhi University, and a PG diploma in Journalism from the Indian Institute of Mass Communication, Delhi, he has worked for news agencies, national newspapers, and automotive magazines. In his spare time, he likes to go off-roading, engage in political discourse, travel, and teach languages.
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