Perovskite PV startup Evolar secures investment to target rapid commercialization

Evolar logo imageSweden-based perovskite-based PV start-up Evolar has announced an investment from Norwegian renewables investor Magnora as it targets rapid commercialization of its technology.

Evolar has been researching the development of perovskites in solar cells, and Evolar now intends to help commercialize the technology. Evolar’s approach is to add a perovskite-based thin-film layer to cells to create a tandem solar cell, which the company said is expected to increase module efficiency by five percentage points.

New perovskite ink could open the door to mass production of perovskite solar cells

KAUST researchers have developed a perovskite ink tailor-made for a mass manufacturing process called slot-die coating, producing PSCs that captured solar energy with high efficiency. The ink could also be coated onto silicon to create perovskite/silicon tandem solar cells.

The planar p-i-n device architecture of the perovskite solar cell employed in the study imageThe planar p-i-n device architecture of the perovskite solar cell employed in the study. Image credit: KAUST

PSCs made in research labs are typically made by spin-coating, which is unsuited to mass manufacture. Slot-die coating, in contrast, is a manufacturing technique used industrially for many years. “The process involves continuously and precisely forcing an ink through a narrow slit that is moved across the substrate to form a continuous film,” Anand Subbiah, a postdoc in Stefaan De Wolf’s lab, said. “This high-throughput technique would allow for roll-to-roll fabrication, similar to printing newspapers.”

KAUST researchers examine the influence of temperature on tandem solar cell performance

KAUST researchers have conducted outdoor tests, that have shown that an increase in temperature affects the performance of a tandem perovskite/silicon solar cell due to voltage losses aw well as current mismatch between the two sub-cells.

KAUST tests influence of temperature on tandem cells performance image

The energy yield of two-terminal tandem cells is maximized when the two sub-cells produce the same current at the maximum power point. However, when one of the two devices generates less current than the other, and current mismatch between the sub-cells occurs, the overall device's current is affected.

KAUST team develops highly stable and industry-ready perovskite-silicon tandem solar cell

Researchers from King Abdullah University of Science and Technology (KAUST) have fabricated efficient, two-terminal monolithic perovskite-silicon tandem solar cells and tested them outdoors. The tandem device that resulted from this research was found to be more stable than conventional perovskite cells and, importantly, optimized for use in industry.

Perovskite/silicon cells under test at KAUST outdoor facility imagePerovskite/silicon cells under test at KAUST outdoor facility

The findings of KAUST Research Scientists Dr. Erkan Aydin and Dr. Thomas Allen, and colleagues in Professor Stefaan De Wolf's group, indicate that the temperature dependence of both the silicon and perovskite bandgaps—which follow opposing trends—shift the current-matching-optimization point away from that for two-terminal tandems under standard test conditions.

South Korean government's roadmap shows strong focus on solar sector

South Korea’s Ministry of Trade, Industry and Energy (MOTIE) recently released a new roadmap for the domestic solar module industry that puts a strong focus on solar applications.

According to the document, domestic solar manufacturers and research institutes expect tandem solar cell technology based on silicon and perovskite to be the most promising candidates for PV products of the next generation. The Korean semiconductor and display industries, according to the MOTIE, may play a decisive role in this transition by providing its expertise in silicon product and thin film development.