IIT Delhi Researchers Discover Eco-Friendly Method for Developing Perovskite Solar Cells in Ambient Air

IIT Delhi researchers have developed a solution to find perovskite solar cells under ambient conditions, achieving higher efficiency and stability. Know details here

IIT Delhi Researchers Discover Eco-Friendly Method for Developing Perovskite Solar Cells

A research team from the Indian Institute of Technology (IIT) Delhi, led by Prof. Trilok Singh at the Department of Energy Science and Engineering (DESE), has been exploring solutions to address defects, stresses, and reproducibility challenges in solar devices. In a recent publication in the SMALL Journal (Wiley), they successfully fabricated perovskite solar cells under ambient conditions, achieving enhanced efficiency and stability. Moreover, by meticulously selecting specific molecules, the team introduced an anti-solvent-free fabrication strategy aimed at improving device reproducibility.

Developing Perovskite Solar Cells in Ambient Air

To address the lattice mismatch at the electron transport layer (ETL)/perovskite interface, the team utilized Guanidine sulfate salt (Gua-S). This salt effectively minimizes interfacial stresses due to the similar sizes of the Gu and FA ions. Additionally, Gua-S can mitigate both cationic and anionic defects in the film, thanks to its amino anchoring groups (-NH2) and sulfate anion (SO4²⁻).

Prof. Trilok Singh, DESE said, “The device demonstrated exceptional stability, maintaining 87% of its initial PCE after 2000 hours of operation. This highlights the potential of Gua-S as an effective approach for improving both the performance and long-term stability of PSCs. Such innovative solution of using anti-solvent-free techniques will promote the upscaling of perovskite solar cells under ambient conditions.”

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