L R AS Published on Friday 18 September 2020 - n° 332 - Categories:perovskite, cells
How do silicon-perovskite tandem cells react to strong insolation?
In Saudi Arabia, different cells have been placed to test their reaction to high temperatures. Although each cell was set to match the current of the other to prevent the cells from interfering with each other's performance, it was found that
that the two cells have opposite reactions at very high operating temperatures. This is because the band gap of the silicon cell is smaller, while that of the perovskite is larger. For tandem cells optimised to operate under laboratory conditions, the temperature actually drives the device away from its ideal operating point.
At operating temperatures above 55°C, perovskites with a bandgap of less than 1.68 electron volts under standard test conditions will perform best in a tandem device with a silicon cell.
"This implies that bromide perovskites with a narrower bandgap under standard test conditions (and therefore better phase stability) hold great promise for the commercialization of perovskite-silicon tandem solar cells.
PV Magazine of 16 September