US researchers have discovered an appropriate solvent design for the application of a 2D top layer on a perovskite solar cell. The cells incorporate the stability of 2D perovskite cells and the efficiency of 3D cells without destroying the 3D bottom layer, which brings them closer to commercialization.
The Solliance consortium achieved a 29.2% record efficiency for the solar cell in November 2021, from just 28.7% in March 2020. In recent months, it increased the perovskite cell for the tandem device from 17.8% to 19.7%.
A UK-Chinese research group claims to have achieved remarkable efficiency and stability for a solar cell based on an electron transport layer doped with two-dimensional titanium carbide (Ti3C2Tx). The champion cell has an efficiency of 23.66%, an open-circuit voltage of 1.095 V, a short-circuit current of 25.07 mA/cm2, and fill factor of 83.18%.
The new energy unit of Reliance Industries has signed an agreement to acquire a 20% stake in California-based perovskite solar startup Caelux for $12 million.
A research group in the Netherlands has analyzed different manufacturing techniques for two-dimensional Ruddlesden–Popper perovskite solar cells. These cells offer improved photostability and environmental stability compared with their three-dimensional counterparts.
A Korean research group has built an inverted perovskite cell that is able to retain 91.7% of its initial efficiency after 1,000 h under standard illumination conditions. They built the device with an electron-accepting interlayer that also acts as charge transport.
Chinese researchers have used inverted perovskite cells with a p-i-n structure to build a perovskite solar module with a reduced heat-affected zone. The panel achieved a power conversion efficiency of 21.07% and a geometric fill factor of 95.5%.
Chinese researchers have built a perovskite quantum dot solar cell that is reportedly able to reduce trap-assisted charge carrier recombination. The device has an open-circuit voltage of 1.23 V, a short-circuit current density of 17.73 mA cm−2, and a fill factor of 0.745.
Australian scientists have demonstrated a flexible perovskite solar cell using roll-to-roll compatible “printing” type processes, which could potentially be applied in large-scale manufacturing. Of particular note is the development of a viable roll-to-roll process to deposit the electrode layer, which has thus far been a major challenge. Cells fabricated by the group achieved a maximum efficiency of 16.7%.
Researchers at the US National Renewable Energy Laboratory claim to have achieved a breakthrough for high-efficiency perovskite solar cells.
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