Superior visible photoelectric response with Au/Cu2NiSnS4 core-shell nanocrystals
Abstract
The incorporation of plasmonic metal nanostructures into semiconducting chalcogenides, in the form of core-shell structures, represents a promising approach to boosting the performance of photodetectors. In this study, we combined Au nanoparticles with newly developed copper-based chalcogenides Cu2NiSnS4 (Au/CNTS), to achieve an ultrahigh optoelectronic response in the visible regime. The high-quality Au/CNTS core-shell structure was synthesized by developing a unique colloidal hot-injection method, which allowed excellent control over sizes, shapes, and elemental compositions. The fabricated Au/CNTS hybrid core-shell structure exhibited enhanced optical absorption, carrier extraction efficiency, and improved photo-sensing performance, owing to the plasmonic-induced resonance energy transfer effect of the Au core. This effect led to a significant increase in carrier density between the Au core and CNTS shell. These values outperformed a CNTS-based gate-free visible photodetector.
Keywords
Cite
@article{arxiv.2308.03167,
title = {Superior visible photoelectric response with Au/Cu2NiSnS4 core-shell nanocrystals},
author = {Anima Ghosh and Shyam Narayan Singh Yadav and Ming-Hsiu Tsai and Abhishek Dubey and Shangjr Gwo and Chih-Ting Lin and Ta- Jen Yen},
journal= {arXiv preprint arXiv:2308.03167},
year = {2023}
}