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Lead-free inverted perovskite solar cells without transparent conducting oxides may achieve 30% efficiency

Researchers in Nigeria have proposed to build inverted perovskite solar cells exclusively with all-inorganic transport materials and a lead-free perovksite absorber. Through a series of simulations, they showed these device may achieve efficiencies over 30% with low production costs.

U.S. scientists develop air-bridge thermophotovoltaic cells with 44% efficiency

U.S. scientists have developed a thermophovoltaic cell that could be paired with inexpensive thermal storage to provide power on demand. The indium gallium arsenide (InGaAs) thermophovoltaic cell absorbs most of the in-band radiation to generate electricity, while serving as a nearly perfect mirror.

Aiko Solar wins patent litigation case against Maxeon in Netherlands

Aiko Solar has won a patent litigation case against Maxeon Solar Technologies in a Dutch court. The judge has ruled that Aiko Solar did not infringe upon Maxeon Solar’s EP2297788B1 patent for back-contact (BC) solar cells.

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First attempt to build perovskite-antimony selenide tandem solar cell delivers 20.58% efficiency

Scientists in China built for the first time a four-terminal tandem perovskite cell with a 17.88%-efficient top perovskite device and a 7.85%-efficient bottom antimony selenide bottom cell. The key features of the tandem cell are the transparent conducting electrode used to improve the spectral response of the top cell and the “double” electron transport layer of the antimony selenide cell.

Inverted perovskite solar cell based on self-assembled monolayer achieves 24.38% efficiency

Researchers in China have designed an inverted perovskite solar cell with a new strategy aimed to optimize the cell’s bottom region. The proposed cell was treated with two molecules known as 2-mercaptoimidazole and 2-mercaptobenzimidazole and was based on a hole transport layer relying on a self-assembled monolayer.

Research shows repaired PV modules can perform with acceptable losses

A research group in Spain has demonstrated the technical feasibility of using repaired solar modules with satisfying results. It also warned, however, that there is an urgent need to define a protocol for evaluating the features of a “viable” repaired panel.

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EPFL unveils perovskite-silicon tandem solar cell with certified efficiency of 30.9%

The tandem solar cell is based on a perovskite top cell treated with an additive known as 2,3,4,5,6-pentafluorobenzylphosphonic acid (pFBPA), which reportedly improves its power conversion efficiency and fill factor. The tandem device also integrates a bottom heterojunction silicon cell made with a 190-μm-thick, 2 Ω.cm, n-type, float-zone, shiny-etched monocrystalline wafer.

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Improving PV module performance with thermoelectric heat storage based on PCM

Scientists in China have fabricated a prototype of a PV system integrating phase change materials, a thermoelectric generator and thermal collectors. The three technologies are intended to cool the solar panel and increase its power generation efficiency.

Hybrid hydrogen-battery system for off-grid PV-powered homes

Conceived by a Dutch research group, the proposed system is intended to store surplus renewable electricity via hydrogen generation and battery storage, with the latter being used only when hydrogen generation is not immediately available. Despite its high initial costs, the system can reportedly offer stable operation.

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Carbon-based perovskite solar cell without hole transport layer achieves 14.15% efficiency

Researchers in China have outlined a new surface engineering strategy to build low-cost solar cells without a hole transport layer. The devices were treated with benzoylcholine halide to reduce non-radiation recombination and achieved remarkable efficiency and stability.

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