A team of researchers from Peking University and the Universities of Surrey, Oxford and Cambridge have developed a new way to reduce an unwanted process called non-radiative recombination, where energy and efficiency is lost in perovskite solar cells. This technique has reportedly produced "the highest performing inverted perovskite solar cell ever recorded".
The team created a technique called Solution-Process Secondary growth (SSG) which increased the voltage of inverted perovskite solar cells by 100 millivolts, reaching a high of 1.21 volts without compromising the quality of the solar cell or the electrical current flowing through a device. They tested the technique on a device which recorded a PCE of 20.9%, which is said to be the highest certified PCE for inverted perovskite solar cells ever recorded.
Professor Ravi Silva, Director of the Advanced Technology Institute at the University of Surrey, said: "It is pleasing to see the Advanced Technology Institute join in this global project that could provide a solution to the need for a truly sustainable, cheap and clean energy resource. This was a monumental effort from leading laboratories, researchers and institutions from across the world, all working together for the common good."