The World's digital transformation generates vast amounts of data daily. Conventional computing technologies face serious challenges in efficiently handling all this information, leading to high energy consumption. Neuromorphic computing offers a more efficient solution by designing systems inspired by the structure and function of the human brain, which processes information in parallel with minimal energy consumption. A key component in this technology is the memristor, a novel electronic element that mimics the synapses and spiking processes of neurons. The memristors containing lead-based halide perovskites (Pb-HPs) are among the best-performing, but the presence of toxic Pb hinders their practical application. MemSusPer aims to develop sustainable, Pb-free HP memristor devices with high performance, stability, reproducibility, and low energy consumption. This will be achieved through two main strategies: (1) enhancing the quality of the perovskite films, and (2) using novel buffer layer materials, such as organic mixed ionic electronic conductors, to regulate the ions migration and induce new energy-efficient activation/deactivation mechanisms. I will conduct the research at the Institute of Advanced Materials (University Jaume I, Spain) with the guidance of Prof. Antonio Guerrero, a leading expert in the field. To validate the developed technology, a 4x4 memristor array will be fabricated using the advanced infrastructure of the Institute of Emerging Technologies (Hellenic Mediterranean University, Greece). MemSusPer is committed to advancing next-generation neuromorphic computing, which is not only high-performing but also eco-friendly, contributing to the green and digital transitions prioritised in the European Union's agenda. The multidisciplinarity and high impact of MemSusPer, combined with the training component of the MSCA-PF, will help me become a tenured independent researcher, expand my expertise, and strengthen my academic profile and networks.