Rhombohedral 3R MoS <sub>2</sub> Polytype: A Promising Fundamental Material for Next‐Generation Device Applications
Prabhukrupa Chinmay Kumar, Sang Mun Jeong, Ramakanta Naik, Chandra Sekhar Rout
Abstract
Abstract The 3R polymorph of MoS 2 demonstrates remarkable versatility across multiple fields, from energy storage and environmental remediation to optoelectronics and quantum technologies. Its unique properties, such as broken inversion symmetry, high surface area, and robust valley coherence, make it a promising material for addressing current technological challenges. As research continues to uncover its potential, 3R‐MoS 2 is poise to play a pivotal role in advancing next‐generation devices and applications. This review highlights the growing interest in the 3R polytype of molybdenum disulfide (MoS 2 ), a metastable yet thermodynamically stable phase with unique ABC stacking and broken inversion symmetry. In comparison to the widely studied 2H phase, 3R‐MoS 2 exhibits distinctive structural, electronic, and optical properties, making it highly suitable for various next‐generation device applications in the field of quantum technologies, energy storage, catalysis, and optoelectronics. The review covers synthesis methods, structural and electronic characteristics, and various application domains 3R‐MoS 2 while addressing challenges such as limited exploration, synthesis difficulties, and underutilized properties. Future prospects and directions for research are also outlined to encourage broader investigation and technological implementation.