Low-temperature perovskite solar module with 19.1% efficiency

• Researchers have actually developed a PV module with an efficiency of 20.72%, based upon tin oxide (SnO2) as an electron transport layer, an organometal halide perovskite layer, organic halide salt phenethylammonium iodide (PEAI) as a passivation representative, as well as Spiro-OMeTAD as the hole transportation layer (HTL).

An international research team has actually created a low-temperature planar perovskite module with an n-- i-- p architecture, an aperture area of 11 cm2, as well as a geometrical fill variable of 91%.

" With this work, we show that the scaling-up of high effective perovskite solar cells to modules is possible without punishing the efficiency as well as keeping the hysteresis index reduced," researcher Aldo di Carlo told pv magazine

The production temperature never ever exceeds 150 C. This represents an extra step to the industrial exploitation of perovskite photovoltaic technology.

The module was developed with 0.09 square-centimeter solar cells. The perovskite option was transferred at 2,000 rpm with 10 seconds ramp-up to completely cover the substratum without continuing at this rate to stop the dimethyl sulfoxide (DMSO) solvent from sticking onto the substrate.

" This is avery critical point, since DMSO was caught throughout film development and developed voids at perovskite-substrate interface, as it has actually been recently demonstrated for a various p-- i-- n architecture," the researchers said. "Additionally, to prevent splits on the perovskite movie, it is extremely critical that the velocity of the antisolvent leaking as well as the distance in between substratum and also pipet suggestion."

The solar module accomplished an optimal power conversion efficiency of 19.11% and a stabilized efficiency of 18.7%.

"The noted basic and also reproducible technique represents a superior standard to be moved to large-area modules (size ≥ 100 centimeters 2) by scalable complete construction procedure out of handwear cover box," the researchers concluded.

The described their design in "Hysteresis-free Planar Perovskite Solar Module with 19.1% Efficiency by Interfacial Defects Passivation," which was recently released in RRL Solar. The research study group consists of scientists from the University of Tor Vergata in Rome, Belgian research study institute Imec, as well as the Swiss Federal Institute of Technology Lausanne (EPFL).