Solar Cells

A numerical study by researchers at India’s Chitkara University has shown enhanced charge extraction in metal-perovskite-metal back-contact solar cell structure through electrostatic doping. The proposed design yielded a 59.4% improvement in power conversion efficiency over previously reported structures.

The mini panel has a surface of 10 cm². It was built with a manufacturing technique that is claimed to be compatible with the integration of perovskite into heterojunction silicon solar cells in tandem architecture.

The US researchers claim to have achieved the remarkable result by adding a special conductive layer of tin dioxide bonded between the conductive layer and the perovskite material. They also improved the perovskite layer special additives that do not alter the material’s bandgap.

According to German scientists, the quality of the photoluminescence quantum yield of the perovskite layers can be reliably and precisely determined for the first time. It shows that the promising material has more potential for optimization than previously assumed.

Dutch scientist Bonna Newmann spoke with pv magazine about the present and future of vehicle-integrated PV from a technological and economic perspective. Solar panels installed on cars could have a payback time of only three or four years and ensure 10,000 km of pure PV-generated road travel per year, she said. Furthermore, if you live in a sunny place, you can drive an electric car with solar panels for weeks during summertime, without the need for recharging, she pointed out.

Jinko Solar secured another 338 million square meters of PV glass from Flat Glass. Tongwei and Trina Solar have left the monocrystalline wafer production joint venture they set up with Longi.

Increasing prices may prompt module manufacturers to find alternatives, or at least reduce silver use in solar cell metallization, according to a recent study. Researcher Samuele Lo Piano, however, told pv magazine silver availability does not represent an issue for large scale PV. Copper-nickel alloys may offer an alternative, he added, but there could be a long wait for them to be viable.

The manufacturer accounted for around 40% of total solar module demand in Taiwan in 2020. It expects to see its domestic market share increase to 50% this year.

Flat Glass has activated two new glass furnaces that will bring its total production capacity to 8,600 MT per day. JinkoSolar has secured 20 GW of orders for its 182mm-wafer-based modules.

Researchers in the Netherlands have sought to identify all those semiconductor materials that may make the application of carrier multiplication in photovoltaics much more than a mere suggestion. According to them, the bandgap of the materials should be between 0.6–1.0 electronvolt (eV), which would result in maximum theoretical efficiency of around 44%. 2D and bulk materials were indicated as the most promising with near-ideal carrier multiplication.