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Gallium arsenide solar cell achieves 23.1% efficiency via electrochemical porosification

An international research group has utilized a new porosification technique to build gallium arsenide (GaAs) solar cells that allow the recovery of germanium films. The new cell achieved an efficiency that is reportedly in line with that of other GaAs PV devices, but can be produced at a lower cost thanks to the reuse of germanium.

Scientists achieve 29.9% efficiency for four-junction perovskite-CSI tandem solar cell

Achieved by scientists led by the National University of Singapore, the result is the highest efficiency ever recorded for a perovskite-CIS tandem solar cell at the research level to date. The researchers used methyldiammonium diiodide (MDADI) to reduce open-circuit voltage losses in the top perovskite cell.

‘Cool roofs’ increase power yield in bifacial rooftop PV systems

A Spanish-Algerian reserch group has tested how “cool roofs” could help increase power yield in rootop bifacial PV systems. Cool roofs are based on coating materials with high reflectance properties.

Agrivoltaic system achieves 9.9% efficiency, LCOE of $0.033/kWh

Researchers in China have built a prototype of a spectral-splitting concentrator agrivoltaic system (SCAPV) with a PV efficiency of 9.9, a hybrid light-use efficiency rating of 9.05%, and a levelized cost of energy (LCOE) of $0.033/kWh.

Residential PV for urban loads as an antidote to solar curtailment

Researchers in the Netherlands have proposed the use of residential PV capacity to supply electricity to urban loads such as tram substations and dwellings, potentially reducing PV curtailment and demand for additional storage.

Researchers shed light on mysterious, higher energy yields in vertical PV systems

Scientists in the Netherlands have sought to understand the reason for unexpected gains in vertical PV systems and found that these installations have a much higher heat transfer coefficient than their horizontally deployed counterparts.

Sharp claims 33.66% efficiency for silicon tandem solar cell

The Japanese electronic manufacturer said this is the world’s highest efficiency for a stacked solar cell that combines a tandem double-junction solar cell and a silicon solar cell.

New lead-free perovskite solar cell design promises 26.96% efficiency

Bangladeshi scientists have developed a high-efficiency perovskite solar cell with 26.96% efficiency, an open-circuit voltage of 1.0478 V, and a fill factor of 81.35%.

Novel cadmium telluride solar cell design with potential efficiency of 31.82%

Scientists in Bangladesh designed a cadmium telluride solar cell with upper/top and back contact materials made of aluminum (Al) and nickel (Ni). The device reportedly showed a quantum efficiency of around 100 % at visible wavelengths.

Fraunhofer ISE presents silicon carbide string inverter for medium-voltage applications

Fraunhofer ISE researchers claim the new silicon carbide inverter is technically able to handle voltage levels of up to 1,500 V at 250 kVA in utility scale solar power plants.

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