Solar Cells

Scientists in the United Kingdom have investigated the formation of cracks in PV cells, confirming that the high temperatures cells are exposed to during soldering for interconnection are a leading cause of cracking. Their findings will aid future research into module reliability and predictions of how cracks are likely to form.

The system can metallize the front and back sides of silicon solar cells with unprecedented precision and speed, Fraunhofer ISE said. The technology is also suitable for components such as printed circuit boards or chip cards.

Scientists in the Netherlands have claimed that a heterojunction metal wrap-through solar module they are designing could offer a 4% performance improvement over conventional heterojunction panels.

The EU-funded Nextbase project aims to manufacture heterojunction, interdigitated back-contact solar modules for less than €0.275/W. Solar panels featuring the Nextbase cell tech are expected to have a conversion efficiency of 23.2%, according to the European Commission.

Through a CHF165 million capital increase, the Swiss company intends to finance the expansion of capacities for highly efficient solar cells and solar modules in Germany. Production is scheduled to start next year. The strategic partnership with REC Group has been discontinued.

The spherical 3D cells can reportedly generate around 101% more power than conventional flat solar cells. Measurements have also shown that the spherical cells provide a 10% lower maximum temperature compared to flat cells, while accumulating less dust.

A team of researchers led by Nanchang University in China trialed a polymer based hole transport layer to flexible perovskite solar cells, using a glue to attach it to the active perovskite. The team was able to assemble the 19.87%-efficient cells into a small flexible module suitable for wearable solar applications, and says its design was inspired by the structure and movements of human vertebrae.

Researchers at the Massachusetts Institute of Technology have developed a new approach to improve the electrical properties of monolayer graphene grown by CVD that could be used in the production of more efficient and stable ultra-light organic cells. They used parylene to develop transparent graphene electrodes through a roll‐to‐roll transfer technique.

The SOL 7 series comprises five products for Perc, Topcon and heterojunction devices.

Risen Solar has unveiled plans for a 15 GW cell and module fab in Yiwu City, Zhejiang province and China South Glass is fundraising for a PV glass factory in Anhui province. Such growth, however, may be slowed by the introduction of new standards by the government.