Journal
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
Volume 74, Issue -, Pages 249-254Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.mssp.2017.10.037
Keywords
Au nanoparticles; Plasmonic effects; ZnO thin films; Semiconductor materials; Nanomaterials
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Gold nanoparticles (AuNPs) were grown on p-Si substrate in order to investigate its effects on the optical, electrical and structural characteristics of the electrochemically deposited ZnO thin films and produced p-Si/AuNP/n-ZnO hetero-structures. Homogenous distribution of AuNPs on p-Si substrate with an average size of 150 nm and surface plasmon resonance wavelength around 700 nm has been observed. Polycrystalline nature of ZnO thin films have been confirmed with the dominant crystal plane of (002) for the sample grown on bare p-Si substrate, while it is (100) plane dominant for the sample grown on the AuNPs/p-Si substrate. Formation of Znrich ZnO has been realized in ZnO thin films grown on the AuNPs substrate, while it is O-rich in the thin films grown on p-Si substrate with X-ray Photoelectron Spectroscopy. Enhancement of Raman peaks, near-bandedge and intra-bandgap absorption, and the near-bandedge emission has been observed on the ZnO thin films grown on AuNPs. Higher forward bias current values have been observed in the hetero-structure produced by interface AuNPs, p-Si/AuNPs/n-ZnO.
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