Perovskite

Researchers in China claim to have achieved the highest efficiency ever reported for perovskite solar cells based on “alternative” hole transport materials. The device reportedly offers improved hole extraction and significantly reduced charge recombination at the interface between the perovskite layer and the hole transport layer.

Conceived to be produced at substantially lower costs than conventional perovskite solar cells based on metal contacts, the new cell is reportedly able to achieve a bifaciality factor of over 80% and a power generation density exceeding 36%.

A new measurment and solar simulator instrument designed for perovskite-silicon tandem cells and encapsulated mini-modules is the latest product from a collaboration between Canadian solar simulator supplier G2V Optics and U.S.-based measurement instrumentation company Sinton Instruments.

Silicon-perovskite tandem solar requires optimization of both approaches, and embodies the weaknesses of each. Meanwhile, the use of pure thin-film devices offers a cheaper, simpler, and more sustainable PV solution for the United States.

North Korean researchers have designed a perovskite solar cell with an absorber treated with ionic liquids. The device reportedly offers improved passivation and fewer recombination losses.

An international research team has developed a novel way to remanufacture fully encapsulated perovskite solar cells after recycling. The researchers say the devices can achieve 88% of the original efficiency of the products.

Research teams have developed methods for perovskite passivation, but there hasn’t been a clear understanding of how the process works. A new Massachusetts Institute of Technology (MIT) study provides details on how to passivate the material’s surface so the perovskite no longer degrades so rapidly or loses efficiency.

Developed by scientists in Canada, the 0.049 cm2 solar cell was built in ambient air fabricationand with a reactant known as phenyltrimethylammonium chloride (PTACl). It achieved an open-circuit voltage of 0.95 V, a short-circuit current density of 23 mA cm−2, and a fill factor of 80%.

An international research team claims to have achieved optimal passivation in inverted perovskite solar cells by applying thin layers of low-dimensional perovskite on top of a 3D perovskite film. The resulting cell achieved an open-circuit voltage of 1.19 V, a short-circuit current density of 24.94 mA cm2, and a fill factor of 85.9%.

Researchers in Singapore have built an inverted perovskite PV device with a p-type antimony-doped tin oxides (ATOx) interlayer that reportedly reduces the efficiency disparity between small and large-area perovskite cells. According to their findings, ATOx may easily replace commonly used nickel oxides (NiOx) as a hole transport material.