Presentation Information
[24p-22C-4]Improved performance and stability in formamidinium lead iodide perovskite solar cells through an adlayer consisting of fs laser-treated FAPbI3-QDs.
〇Svrcek Vladimir1, Bruno Alessi1, Calum McDonald1, Takuya Matsui1 (1.AIST Tsukuba)
Keywords:
quantum dots,perovskites,solar cell
Formamidinium lead iodide (FAPbI3) perovskite thin films have garnered attention for their use in high-efficiency single-junction solar cells, exceeding 26%. To enhance FAPbI3 hybrid solar cells, we propose adding an adlayer of FAPbI3-QDs, leveraging the quantum confinement effect to increase their energy gap. We've developed a method for air-stable FAPbI3-QDs with quantum confinement and a photoluminescence quantum yield of over 80%, depositing them as an adlayer on the FAPbI3 perovskite absorber layer. Our results show improved overall efficiency with the FAPbI3-QDs adlayer. Air-stable FAPbI3-QDs not only widen the energy gap but also act as a passivation layer, enhancing compatibility with the electron-hole transport layer. Stability is crucial, where films with the surface-engineered FAPbI3-QDs adlayer exhibit marked improvement after 168 hours of continuous light exposure in a humid chamber (RH~30%, T~28°C).