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King Abdullah University of Science and Technology

Inverted perovskite solar cell with 22.8% efficiency

The cell features an open-circuit voltage of 1.1 V and a short-circuit current of 26 milliampere per cm-2, which the research team described as the best performance for an inverted perovskite cell based on single-crystal methylammonium lead triiodide. The device was built with a microns-thick absorber layer placed between an electron transport top layer and a hole-transport bottom layer.

Doping and capping promise perovskite stability

Scientists demonstrated two new approaches to improving the stability of perovskite solar cells. By both incorporating rubidium into the structure of the perovskite, and adding a film of two-dimensional perovskite as a capping layer, they were able to demonstrate a significant reduction in the cell’s sensitivity to moisture. The group says its research will open up new routes to improved performance and stability in perovskite PV.

Focus on temperature to reduce LCOE, says new study

A new model to assess the role of module temperature in PV power plant economics, developed by scientists in Saudi Arabia, finds that keeping modules cool could be an even more effective strategy to increasing energy yield than pursuing further gains in cell efficiency. The model finds that reducing module temperature by three degrees has a similar impact on energy yield to a 1% increase in conversion efficiency.

23.8% efficient tandem cells via slot-die coating

Scientists in Saudi Arabia demonstrated a slot-die coating process for production of perovskite solar cells from a specially engineered ‘ink’. Using the process, the group fabricated a perovskite/silicon tandem cell that recorded 23.8% efficiency.

A cell so thin, it can rest on a soap bubble

Scientists at Saudia Arabia’s King Abdullah University of Science and Technology demonstrated an organic PV cell that can simply be printed onto a piece of paper. The cell set a new efficiency record for a fully inkjet-printed device, and its designers envisage applications in integrated medical sensors.

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Redox flow battery powered by perovskite solar cells

An international team has developed an integrated solar flow battery which has been suggested as ideal for off-grid locations. The device, which combines energy conversion and storage in one unit, can be used for lighting and recharging cell phones.

A perovksite-silicon tandem cell with 25.7% efficiency

The device exhibited a small performance loss after a 400-hour thermal stability test at 85 degrees Celsius and after the same period under maximum power point tracking at 40 degrees Celsius, according to its developer. The cell was made by combining solution-processed, micrometer-thick perovskite top cells with fully-textured silicon heterojunction bottom cells.

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An inverted perovskite cell with 22.3% efficiency

Saudi researchers have developed a cell which is said to exhibit improved structural and optoelectronic properties as well as enhanced carrier mobility and diffusion lengths. The feat was achieved by reducing voltage losses using a new passivation technique.

Watch how to improve perovskite solar cells in 2D!

Saudi researchers claim to have improved the thermal stability and moisture resistance of such devices by replacing 3D hybrid perovskite with two-dimensional compounds. They used organic compound ethanolamine, which is said to provide better results in slowing down the hot-carrier cooling process.

Stretching exercises for crystalline silicon solar cells

Researchers from Saudi Arabia’s King Abdullah University of Science and Technology have created flexible solar cells made of crystalline silicon. They claim to have stretched a crystalline silicon cell’s surface by around 95% while maintaining conversion efficiency of around 19%.

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