| Autor: |
Jadhav YA; Symbiosis Center for Nanoscience and Nanotechnology (SCNN), Symbiosis International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India., Rahane GK; Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India., Goswami T; Institute of Nano Science and Technology, SAS Nagar Sector 81, Mohali, Punjab 140306, India., Jagadish K; Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India., Chordiya K; ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3., Szeged H-6728, Hungary., Roy A; Environment and Sustainability Institute, University of Exeter, Penryn Campus, Cornwall TR10 9FE, U.K., Debnath T; Nano Physical Spectroscopy Group, Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence, Delhi NCR 201314, Uttar Pradesh, India., Jathar SB; Department of Physics, Savitribai Phule Pune University, Pune 411007, India., Devan R; Department of Metallurgy Engineering and Materials Science, Indian Institute of Technology Indore, Simrol, Indore 453552, India., Upadhyay Kahaly M; ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3., Szeged H-6728, Hungary., Rondiya SR; Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India., Ghosh HN; School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 752050, Odisha, India., Dzade NY; Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States. |
| Abstrakt: |
Considering the importance of physics and chemistry at material interfaces, we have explored the coupling of multinary chalcogenide semiconductor Cu 2 NiSnS 4 nanoparticles (CNTS NPs) for the first time with the noble metal (Au) to form Au-CNTS nano-heterostructures (NHSs). The Au-CNTS NHSs is synthesized by a simple facile hot injection method. Synergistic experimental and theoretical approaches are employed to characterize the structural, optical, and electrical properties of the Au-CNTS NHSs. The absorption spectra demonstrate enhanced and broadened optical absorption in the ultraviolet-visible-near-infrared (UV-Vis-NIR) region, which is corroborated by cyclic voltammetry (CV) readings. CV measurements show type II staggered band alignment, with a conduction band offset (CBO) of 0.21 and 0.23 eV at the Au-CNTS/CdS and CNTS/CdS interface, respectively. Complementary first-principles density functional theory (DFT) calculations predict the formation of a stable Au-CNTS NHSs, with the Au nanoparticle transferring its electrons to the CNTS. Moreover, our interface analysis using ultrafast transient absorption experiments demonstrate that the Au-CNTS NHSs facilitates efficient transport and separation of photoexcited charge carriers when compared to pristine CNTS. The transient measurements further reveal a plasmonic electronic transfer from the Au nanoparticle to CNTS. Our advanced analysis and findings will prompt investigations into new functional materials and their photo/electrocatalysis and optoelectronic device applications in the future. |
