Perovskite Solar Cells Designed With Low‐Toxicity Solvents for Environmental Sustainability

Résumé fourni par la source

As perovskite solar cells (PSCs) are approaching commercial mass production, the development of environmentally sustainable manufacturing processes is becoming a priority. Herein, we report the design and fabrication of inverted (p–i–n) PSCs utilizing a fully low‐toxicity solvent system. We successfully replaced conventional toxic solvents, such as N, N‐dimethylformamide (DMF) and dichlorobenzene (DCB), with safer alternatives for all functional layers. The perovskite precursor was formulated by replacing the conventional DMF with a binary solvent system utilizing 1,3‐dimethyl‐2‐imidazolidinone (DMI) as a key cosolvent. Through process optimization and analyses, it was confirmed that adjusting the DMI:dimethyl sulfoxide (DMSO) ratio to 50:50 effectively suppressed pinhole formation and enabled the formation of a perovskite film with high uniformity and crystallinity. Furthermore, the use of anisole in the electron transport layer deposition has proven to be a suitable alternative to the DCB, enabling the suppression of nonradiative recombination losses while maintaining efficient charge extraction. The resulting device, processed with low‐toxicity solvents, achieved a maximum power conversion efficiency (PCE) of 17.17% with long‐term stability, retaining over 88.7% of its initial PCE after 580 h. These findings demonstrate the feasibility of a low‐toxicity solvent‐based approach and suggest an environmentally sustainable route toward the commercialization of high‐performance PSCs.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.