An international team of researchers from King Abdullah University of Science and Technology (KAUST), Ulsan National Institute of Science and Technology (UNIST) and the Chinese Academy of Sciences have reportedly developed an inverted perovskite solar cell incorporating low-dimensional perovskite layers at the solar cell's top and bottom interfaces. 

The team achieved optimal passivation in inverted perovskite solar cells by applying thin layers of low-dimensional perovskite on top of a 3D perovskite film. The resulting cell achieved an open-circuit voltage of 1.19 V, a short-circuit current density of 24.94 mA cm², and a fill factor of 85.9%.

Researchers from the Korea Institute of Energy Research (KIER), Korea Research Institute of Standards and Science, Jusung Engineering and the Jülich Research Center have reported an advancement in the stability and efficiency of semi-transparent perovskite solar cells.

The semi-transparent solar cells achieved an impressive efficiency of 21.68%, which is said to be the highest efficiency to date among perovskite solar cells that use transparent electrodes. Additionally, they showed remarkable durability, with over 99% of their initial efficiency maintained after 240 hours of operation.

Researchers at the Karlsruhe Institute of Technology (KIT), Institute for Solar Energy Research Hamelin (ISFH) and Leibniz University Hannover have designed triple-junction perovskite–perovskite–silicon solar cells with a record power conversion efficiency of 24.4%. 

Schematic of the solar cell. Image from Energy & Environmental Science

Optimizing the light management of each perovskite sub-cell (∼1.84 and ∼1.52 eV for top and middle cells, respectively), the team maximized the current generation up to 11.6 mA cm⁻². Key to this achievement was the development of a high-performance middle perovskite sub-cell, employing a stable pure-α-phase high-quality formamidinium lead iodide perovskite thin film (free of wrinkles, cracks, and pinholes). This enabled a high open-circuit voltage of 2.84 V in a triple junction. Non-encapsulated triple-junction devices retain up to 96.6% of their initial efficiency if stored in the dark at 85 °C for 1081 h.

Researchers at the University of North Carolina at Chapel Hill and CubicPV have developed mini solar modules based on perovskite cells treated with zinc trifluoromethane sulfonate [Zn(OOSCF₃)₂]. The scientists found that using a small amount of this zinc salt in the perovskite solution can address the issue of interstitial iodides, which are the most critical type of defects in perovskite solar cells that limits efficiency and stability. The zinc salt helps control the iodide defects in resultant perovskites ink and films. 

The scientists explained that this is a low-cost material that is used as an additive at a very small percentage in perovskite inks and that its use makes perovskite module fabrication more reproducible, which helps to also make it cheaper.

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Tata Chemicals has announced a collaboration with IITB-Monash Research Academy for pioneering research in the field of perovskite/clean energy. The strategic partnership will aim to advance sustainable energy transition solutions and foster innovation in clean energy technologies.

Under this agreement, Tata Chemicals will support the next-generation technology research led by the IITB-Monash Research Academy focused on the transformative potential of perovskite materials in the field of clean energy.

U.S-based University of Vermont spinoff, Verde Technologies, has reported progress with its thin film coating technology in a pilot with contract manufacturer Verico Technology, demonstrating that its coating processes are transferable to existing commercial roll-to-roll manufacturing lines.

The companies completed the deposition of perovskite solution on a flexible substrate measuring 76.2 cm x 6,096 cm using standard manufacturing processes, equipment, and environmental conditions. The novel coating tool and process received the name Verde Slot Coating.

Researchers at Lawrence Berkeley National Laboratory (Berkeley Lab), led by Prof. Peidong Yang, have developed a new 3D printing ink based on perovskite materials, that exhibits near unity photoluminescence quantum yield (PLQY). Interestingly, as it is a 3D printable ink, it is possible to create luminescent objects from it, as seen in the image below:

Eiffel Tower luminescent structures, made from 3D-printed supramolecular ink (Berkeley Lab)
 

The researchers brand the new ink as 'supramolecular ink', and say it is produced without any rare metals. It is a combination of several powders containing hafnium (Hf) and zirconium (Zr), and is made at room temperatures. In a process called supramolecular assembly, tiny molecular building block structures are self-assembled within the ink. These supramolecular structures enable the material to achieve stable and high-purity synthesis at low temperatures.

Researchers at Ulsan National Institute of Science and Technology (UNIST) recently set out to develop a scalable photoelectrochemical (PEC) system to produce green hydrogen.

(a) Concept design of NiFeOOH/Ni/FAPbI3 photoanode-based water splitting cell. (b) All-PSK-based encapsulated PEC reactor made of repeated mini-modules. Credit: Nature Energy & Dr Dharmesh Hansora, UNIST

The team explained that for practical photoelectrochemical water splitting to become a reality, highly efficient, stable and scalable photoelectrodes are essential. However, meeting these requirements simultaneously is a difficult task, as improvements in one area can often lead to deterioration in others. To address this challenge, the team developed a formamidinium lead triiodide (FAPbI₃) perovskite-based photoanode that is encapsulated by an Ni foil/NiFeOOH electrocatalyst, which demonstrates promising efficiency, stability and scalability. 

Researchers from Japan's National Institute for Materials Science (NIMS) and Hokkaido University have designed an inverted “n-i-p” perovskite solar cell with a new bond/charge regulated defect passivation technique, enabled by introducing bifunctional molecules onto the perovskite absorber. The device exhibited a low open circuit voltage deficit and impressive stability.

The newly-fabricated solar cell with was based on a perovskite material that doesn't contain methylammonium (MA) molecules. These molecules have intrinsic thermal instability and contribute to increasing the typical thermal instability of perovskite PV devices.