Microwave-Mediated Synthesis of Lead-Free Cesium Titanium Bromide Double Perovskite: A Sustainable Approach

• DOI: 10.1021/acs.chemmater.3c03108
• Publication Date: 2024-02-03T01:37:31Z
• Authors: Emmanuel Reyes-Fr...; Carlos Echeverría...; Diego Esparza; Tzarara López-Luke; Tatiana Soto-Montero; Monica Morales-Masis; Silver-Hamill Tur...; Iván Mora-Seró; Beatriz Julián-López
• Keywords: Lead (geology); Caesium; Inert gas

Theoretical studies have identified cesium titanium bromide (Cs2TiBr6), a vacancy-ordered double perovskite, as promising lead-free and earth-abundant candidate to replace Pb-based perovskites in photovoltaics. Our research is focused on overcoming the limitations associated with current Cs2TiBr6 syntheses, which often involve high-vacuum high-temperature evaporation techniques, high-energy milling, or intricate multistep solution processes conducted under an inert atmosphere, constraints that hinder industrial scalability. This study presents straightforward, low-energy, scalable procedure using microwave radiation induce formation of highly crystalline polar solvent. methodology, where choice solvent plays crucial role, not only reduces energy costs perovskite production but also imparts exceptional stability resulting solid, comparison previous reports. critical prerequisite for any technological advancement. The low-defective material demonstrates unprecedented structural various stimuli such moisture, oxygen, elevated temperatures (over 130 °C), continuous exposure white light illumination. In summary, our represents important step forward efficient cost-effective synthesis Cs2TiBr6, offering compelling development eco-friendly, Pb-free materials.