Technology and R&D

Although cells lose much of their power yield when submerged, they may not be useless. Researchers in India say submerged cells could be used in monitoring sensors and for other commercial and defense applications. An amorphous silicon cell from Panasonic was tested in their study.

Scientists in India have tested a new inverter topology with a single-phase, induction-motor water pump. The seven-level inverter, with five power semiconductor switches, is said to be particularly efficient at reducing switching losses thanks to a pulse width modulation technique.

Italian researchers have added graphene to the titanium dioxide electron selective layer used in a perovskite cell to increase chemical stability. The two-terminal cell was made by stacking two sub-cells which were fabricated and optimized separately.

Scientists in China have used a fluorine-containing Lewis acid treatment to develop a perovskite cell that is said to retain between 63% and 80% of its initial efficiency after 14 days under 75% and 85% relative humidity.

Solid-state batteries are viewed by many as the most promising technology to succeed today’s lithium-ion technologies in many energy storage applications. But there are still plenty of barriers to large-scale use of this type of battery. An international team of scientists has reviewed recent progress with the technology, and examined the form and chemistry that commercial solid-state batteries might take.

Superior hydrodynamic properties, more robustness in high seas and a much reduced logistics requirement support the case for thin-film over crystalline silicon, pontoon-mounted alternatives, according to an Indo-Italian research group.

A U.S. research group has used a lead-absorbing material to coat the front and rear of a perovskite solar cell stack. The researchers claim the films captured 96% of lead leakage when the cells were damaged.

Lack of flannel in the latest quarterly and full-year filing indicates the Israeli inverter maker is happy the figures speak for themselves. The company is in an expansionary mode as it enters the energy storage and electrical vehicle markets with cash from its financial warchest.

A Dutch research team has used highly transparent, hydrogenated nanocrystalline silicon oxide layers to improve the optoelectrical performance of contact stacks in a silicon heterojunction device. The material is said to offer superior electrical as well as favorable optical properties.

Scientists at Australia’s University of Queensland have set a new world efficiency record for a quantum dot solar cell. The group fabricated a 0.1cm² device from a perovskite material and measured power conversion efficiency at 16.6%. The record has been verified by the United States National Renewable Energy Laboratory.