Researchers of Fraunhofer ISE (Fraunhofer Institute for Solar Energy Systems), a German institute that conducts research in solar energy, developed an perovskite silicon solar cell, measuring 1 cm², with efficiency of energy conversion of 31,6%.
The cell is formed by a perovskite layer deposited on a solar cell Hjt (silicon heterojunction) using what researchers call a “hybrid manufacturing route.”
The researchers suggested that apply with such success layer to a textured surface is an important prerequisite for industrial production of these solar cells.
The CalLab (calibration laboratory), of the Fraunhofer ISE, certified the energy conversion efficiency value, which is the highest to date for a perovskite silicon solar cell using this hybrid deposition process.
“To achieve this value, we focused on the upper perovskite cell and in particular we have optimized the passivation between the perovskite layer and the electron transport layer,” said Dr. Juliane Borchert, group leader of the Perovskite Materials and Interfaces group at Fraunhofer ISE.
“We hope that a further increase in efficiency will be possible through improvements in the lower silicon cell,” said Juliane.
The researcher also noted that, “a special method is required to apply the perovskite layer evenly on the textured silicon surface,” suggesting that more work will be done on the cell in the near future.
“In our laboratories, we are working on a hybrid process combined vapor deposition and wet chemical deposition to overcome this obstacle,” he concluded.
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The study
The study is the result of two research projects from Fraunhofer, ““Presto” and “MaNiTU”, which sought to investigate new methods and materials for producing perovskite silicon tandem solar cells, respectively.
O day from the German Institute had the contribution of scientists from KAUST (King Abdullah University of Science and Technology) in Saudi Arabia.
Os researchers from the Arab university received featured in the press at the beginning of the year for developing another silicon perovskite tandem cell, with a slightly higher energy conversion efficiency of 33,2%, compared to the current one, which has an efficiency of 31,6%.
The search for the development of perovskite cells on an industrial scale continues to grow. Many institutions are investing in new research into this product, which is a mixture of organic and inorganic compounds, with the participation of several chemical elements.
With information from PV Tech
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