Publication date: 22nd July 2026
Abstract
Sustainable solar energy technologies require materials that are efficient, stable, and non-toxic. Hybrid halide perovskites have demonstrated remarkable power conversion efficiencies and low processing costs; however, their practical application remains limited by lead (Pb2+) toxicity and low long-term stability. Consequently, layered double perovskites (LDPs) have emerged as promising alternatives due to their enhanced structural stability, enabled by organic spacer templating of the Ruddlesden–Popper (RP) and Dion–Jacobson (DJ) phases [1]. In this work, we demonstrate the use of mechanosynthesis to prepare Ag(I) and Bi(III) based layered halide (I, Br) double perovskites incorporating benzylammonium and 1,4-phenylmethylammonium cations in RP and DJ structures, respectively. Thin films were fabricated and characterized using a combination of structural and optical techniques to evaluate their potential for thin-film opto(electro)ionic and resistive switching applications [2,3]. The synthesized materials exhibit tunable volatile and non-volatile resistive switching behavior together with optically induced synaptic responses, highlighting their potential for sustainable neuromorphic and opto(electro)ionic device technologies [3]. The results demonstrate the versatility of mechanochemical synthesis for accessing previously unexplored LDP compositions, opening the way toward more sustainable technologies.
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