2026-10-15T03:34:07Z https://www.scidb.cn/oai

10.57760/sciencedb.12883 2024-09-12T12:45:43Z

2024-09-12 Polymer Functionalized Antimony Sulfide Quantum Dots for Broadband Optical Limiting doi:10.57760/sciencedb.12883 en The rapid development of Zero-dimensional quantum dots-based nanotechnology motivates the design and synthesis of novel nano-functional materials for optoelectronic and photonic devices in recent years. Antimony sulfide (Sb2S3) quantum dots (SQDs), with an average diameter of 3.22 nm, were prepared via a top-down liquid ultrasonication exfoliation technique. A highly soluble poly(N-vinylcarbazole)-covalently functionalized SQDs (SQDs-PVK) was synthesized in situ by reversible addition fragmentation chain transfer polymerization, and embedded into non-optically active poly(methylmethacrylate) (PMMA) matrix giving the SQDs-PVK/PMMA film. The annealed SQDs-PVK/PMMA film showed exceptional nonlinear optical performance, with large nonlinear absorption coefficients of 713.71 cm/GW at 532 nm and 913.60 cm/GW at 1064 nm, and small limiting thresholds of 1.44 J/cm2 at 532 nm and 1.08 J/cm2 at 1064 nm. These advantages make SQDs–PVK one of the promising candidates for a broadband optical limiter in both the near-infrared and visible ranges. Sb2S3 quantum dots; optical limiting; Z scan Guangwei Li Qian Chen Ningning Dong Haidong He Jun Wang Yu Chen RESTRICTED dataset Science Data Bank