Highly Stable CsPbBr3@MoS2 Nanostructures: Synthesis and Optoelectronic Properties Towards Implementation into Solar Cells

Halide perovskites (HPs) have gained significant interest in the scientific and technological sectors due to their unique optical, catalytic, and electrical characteristics. However, the HPs are prone to decomposition when exposed to air, oxygen, or heat. The instability of HP materials limits their commercialization, prompting significant efforts to address and overcome these limitations. Meanwhile, the transition metal dichalcogenides, such as MoS2, are chemically stable and offer versatile properties suitable for electronic, optical, and catalytic applications. The layered structure of MoS2 allows for the development of protective coatings for other nanoparticles. In this study, we successfully synthesized a novel CsPbBr3@MoS2 core-shell nanostructure (CS-NS) by enveloping CsPbBr3 within a MoS2 shell for the first time. We also demonstrate a significant enhancement in the stability of CS-NSs when dispersed in polar solvents for extended periods. Remarkably, the hybrid CS-NSs exhibits an absorption spectrum closely aligned with MoS2 and photoluminescence (PL) quenching, indicating the potential for charge or energy transfer. We used finite difference time domain (FDTD) simulations to evaluate the efficiency of CS-NS-based solar cells and their potential for performance enhancement. This groundbreaking CS-NSs represents a significant advancement in harnessing halide perovskite materials for applications in photovoltaics and various optoelectronic devices.