Work

Superior stabilized α-FAPbI3 perovskite solar cells with efficiency exceeding 24 %

Year: 2024

Type: article

Abstract: -Fabrication of a stabilized black phase of formamidinium triiodide perovskite film is a critical issue to warrant efficient perovskite solar cells with considerable intrinsic and external stability. To address this obstacle, the study focuses on assembling α-FAPbI 3 perovskite solar cells . To realize a stabilized α-FAPbI 3 , a δ-FAPbI 3 film was annealed at 150 °C at ambient air with a humidity level of 25 % to convert α-FAPbI 3 . Then, this δ → α FAPbI 3 was crushed, and some of it was added to a fresh FAPbI 3 perovskite precursor to fabricate desirable α-FAPbI 3 layers. The cost-effective method, along with the stabilization of α-FAPbI 3 , showed a high ability to promote charge transfer and suppress trap transitions in the perovskite layer. The engineered perovskite solar cells recorded a considerable filling factor of 82.89 % with a champion efficiency of 24.16 %, higher than the recorded efficiency of 21.25 %. In addition, the robust stability enables the FAPbI 3 solar cells to work steadily for more than 1200 h under simulated sunlight irradiance with just an 8 % loss in their performance.

Source: Organic Electronics

DOI: 10.1016/j.orgel.2024.107143