Articles written by Lior Kahana

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Research & Development
Shower wastewater heat pump achieves year-round COP of up to 4.1 Chinese researchers tested a hybrid shower wastewater- and air-source heat pump at university dormitories, recording a stable monthly COP of 3.4 to 4.1 over one year. The system cut annual carbon dioxide emissions by up to 77.77% and offered lower life-cycle costs than conventional boilers under typical market conditions.
Lior Kahana
Sep 18, 2026
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Schematic of the solar cell
Research & Development
Scientists build 17%-efficient semi-transparent perovskite solar cell based on sputter-resistant aluminum oxide layer Researchers replaced the conventional 20 nm SnOₓ buffer layer with just 3 nm of ALD-deposited AlOₓ, which protected inverted perovskite cells from ITO sputtering damage while maintaining efficient charge extraction. The resulting devices achieved efficiencies above 17% in semi-transparent cells and 26% in perovskite-silicon tandems, while reducing material use and fabrication time.
Lior Kahana
Sep 17, 2026
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Research & Development
Symmetry-breaking molecular strategy pushes inverted perovskite solar cell efficiency to 26.32% Researchers used symmetry-breaking co-assembly to improve SAM coverage and interface quality in inverted perovskite solar cells, achieving a 26.32% efficiency and a certified result of 25.67%. An encapsulated device retained 93% of its initial efficiency after 1,150 hours of maximum power point operation.
Lior Kahana
Sep 16, 2026
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Research & Development
Photovoltaic-thermal heat pump based on bio-based surface coating achieves 77.32% overall efficiency Iraqi researchers have developed a PVT heat pump featuring a bio-based TiO₂–linseed-oil coating and three alternative refrigerants. The system achieved up to 77.32% overall efficiency and reduced PV module temperatures by as much as 34 C.
Lior Kahana
Sep 14, 2026
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Research & Development
IoT-controlled jute cooling reduces PV module temperature by 21.4 C Tunisian researchers have developed an IoT-controlled jute-fabric cooling system that reduced PV module temperature by up to 21.4 C and increased power output by 40.44% in desert conditions. The system uses 86% less water than previous natural-fiber cooling approaches while achieving an 81.3% water recovery rate.
Lior Kahana
Sep 11, 2026
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Technology & Products
GoSun unveils solar-chargeable electric tractor GoSun and Moonrider have launched a 27 hp electric tractor powered by a 24 kWh LFP battery, with optional 1.1 kW solar charging. The four-wheel-drive tractor offers about five hours of runtime and features a 750 kg hitch lift capacity, rear PTO and connected functions.
Lior Kahana
Sep 11, 2026
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Research & Development
Iron-mediated cathode enables 206 Wh/kg sodium-ion pouch cell Chinese researchers have developed an iron-mediated strategy that improves the reversibility and stability of lattice-oxygen redox reactions in sodium-ion battery cathodes. A 15.8 Ah pouch cell using the cathode achieved an energy density of 206 Wh/kg, with lattice-oxygen redox reversibility reaching 99%.
Lior Kahana
Sep 11, 2026
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Research & Development
Two-step process turns end-of-life PV backsheets into supercapacitor electrodes Chinese researchers have developed a two-step process to recycle waste TPT solar backsheets into hierarchical porous carbon for supercapacitor electrodes. The resulting material achieved a specific capacitance of 469 F/g and retained 92.4% of its initial capacitance after 10,000 cycles.
Lior Kahana
Sep 10, 2026
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Research & Development
New electrode design increases battery energy density by up to 15% Fraunhofer ISE and its partners have developed thicker electrodes that could increase battery cell energy density by 10% to 15% without adding weight. The PFAS-free, solvent-free concept has been demonstrated in lithium-ion, sodium-ion, and zinc-ion cells and is designed for cost-effective mass production.
Lior Kahana
Sep 09, 2026