Property-directed generative inverse design of inorganic materials

• Main Author: Yamazaki Shuya
• Other Authors: Kedar Hippalgaonkar
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2024
• Subjects: Chemistry; Computer and Information Science; Physics; AI for materials; Generative design; Crystal generation; Variational autoencoder; Wyckoff symmetry
• Online Access: https://hdl.handle.net/10356/181076
• Institution: Nanyang Technological University

Accelerated materials discovery is urgently demanded to drive advancements in fields such as energy conversion, storage, and catalysis. Property-directed generative design has emerged as a transformative approach for rapidly discovering new functional inorganic materials with multiple desired properties within vast and complex search spaces. However, this approach faces two primary challenges: data scarcity for functional properties and the multi-objective optimization required to balance competing tasks. Here, we present a multi-property-directed generative framework designed to overcome these limitations and enhance site symmetry-compliant crystal generation. By incorporating Wyckoff-position-based data augmentation and transfer learning, our framework effectively handles sparse and small functional datasets, enabling the generation of new stable materials simultaneously conditioned on targeted space group, band gap, and formation energy. Using this approach, we identified 8 previously unknown stable semiconductor materials with tailored electronic properties, validated through DFT calculations. We believe our integrated framework represents a significant step forward in the AI-driven inverse design of inorganic materials.