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arXiv · 2308.03167

Superior visible photoelectric response with Au/Cu2NiSnS4 core-shell nanocrystals

Anima Ghosh·Shyam Narayan Singh Yadav·Ming-Hsiu Tsai·Abhishek Dubey·Shangjr Gwo·Chih-Ting Lin·Ta- Jen Yen
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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.

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Anima Ghosh, Shyam Narayan Singh Yadav, Ming-Hsiu Tsai, Abhishek Dubey, Shangjr Gwo, Chih-Ting Lin, Ta- Jen Yen. 2023-08-06. Superior visible photoelectric response with Au/Cu2NiSnS4 core-shell nanocrystals. https://arxiv.org/abs/2308.03167

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