Scientists in China have developed a new method to boost efficiency and strength of solar cells. Researchers demonstrated the molecular press annealing (MPA) strategy that helped perovskite solar cells survive for more than 2,000 hours of continuous testing in extreme heat and high humidity. Devices retain 98.6% efficiency after 16-17 hoursThis strategy enabled n-i-p perovskite solar cells to achieve a power conversion efficiency (PCE) of 26.6%. This strategy enabled n-i-p perovskite solar cells to achieve a PCE of 26.6%, according to the study. These gaps are weak spots that can spread inward, causing the crystal structure to degrade and ultimately reduce the cell’s efficiency.