| Autor: |
Ghosh A; Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan R.O.C.; Department of Physics, School of Sciences and Humanities, SR University, Warangal 506371, India., Yadav SNS; Department of Materials Science and Engineering, National Tsing Hua University, No. 101 Section 2, Kuang Fu Road, Hsinchu City 300, Taiwan R.O.C., Tsai MH; Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 106, Taiwan, R.O.C., Dubey A; Department of Materials Science and Engineering, National Tsing Hua University, No. 101 Section 2, Kuang Fu Road, Hsinchu City 300, Taiwan R.O.C., Lin CT; Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 106, Taiwan, R.O.C., Gwo S; Department of Physics, National Tsing Hua University, Hsinchu City 300, Taiwan R.O.C.; Research Centre for Applied Science, Academia Sinica, Taipei 115, Taiwan R.O.C., Yen TJ; Department of Materials Science and Engineering, National Tsing Hua University, No. 101 Section 2, Kuang Fu Road, Hsinchu City 300, Taiwan R.O.C. |
| Abstrakt: |
The incorporation of plasmonic metal nanostructures into semiconducting chalcogenides in the form of core-shell structures provides a promising approach to enhancing the performance of photodetectors. In this study, we combined Au nanoparticles with newly developed copper-based chalcogenides Cu 2 NiSnS 4 (Au/CNTS) to achieve an ultrahigh optoelectronic response in the visible regime. The high-quality Au/CNTS core-shell nanocrystals (NCs) were synthesized by developing a unique colloidal hot-injection method, which allowed for excellent control over sizes, shapes, and elemental compositions. The as-synthesized Au/CNTS hybrid core-shell NCs exhibited enhanced optical absorption, carrier extraction efficiency, and improved photosensing performance owing to the plasmonic-induced resonance energy transfer effect of the Au core. This effect led to a significant increase in the carrier density of the Au/CNTS NCs, resulting in a measured responsivity of 1.2 × 10 3 AW -1 , a specific detectivity of 6.2 × 10 11 Jones, and an external quantum efficiency of 3.8 × 10 5 % at an incident power density of 318.5 μW cm -2 . These results enlighten a new era in the development of plasmonic core-shell nanostructure-based visible photodetectors. |
