Work

Synthesis of copper iodide (CuI) thin films by DC magnetron sputtering and insight into its properties for photonic applications

Year: 2025

Type: article

Abstract: The electrical, optical, and plasma properties of CuI thin films, prepared by DC magnetron sputtering, have been investigated. The films were deposited for 30, 60, and 90 s on glass substrates. The X-ray diffraction (XRD) studies display that the CuI thin films are polycrystalline. The scanning electron microscopic (SEM) micrographs of the thin films reveal that the film surfaces are smooth with some small grains on the surfaces. The energy dispersive spectroscopic (EDS) studies display that iodine content decrease from 68.95% to 54.04% with deposition time whereas Copper content increases from 31.05% to 45.96%. Fourier transform infrared (FTIR) spectroscopic studies show that the C-O-C, C=C, C-O-C, C-O, C-OH, C-H, and C=N bonds are present in the films. The bandgap of films has been obtained in the span of 2.93-3.11 eV, which agrees well with the previous results. A p-CuI/n-HfO2 solar blind UV-photodetector has been designed with parameters of CuI and the responsivity of 110 mA/W and detectivity of 4.3 × 1030 Jones is obtained for a wavelength of 260 nm. The properties of the CuI thin films indicate that the films can be applied in photonic devices as a carrier transport layer in the future.

Source: Next Materials

DOI: 10.1016/j.nxmate.2025.101474

Authors: Md. Alamin Hossain Pappu, Jaker Hossain, Md. Mojahidur Rahman, Mamunur Rashid Talukder

Institutions: Varendra University, University of Rajshahi

Language: English

Topic: Chalcogenide Semiconductor Thin Films

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,280

Funder: Rajshahi University