One‐Step Synthesis of (CH₃NH₃)₂CuCl₄:ZnS Thin Film for Optoelectronic Applications

Abstract

Improving device performance and reducing Pb-toxicity is one of the fundamental issues of perovskite-based optoelectronic technology. This research demonstrates the synthesis and characterization of pure and ZnS incorporated Cu-based organic-inorganic perovskite via the precursor blending method. The thin films of the perovskites are deposited via one-step spin coating method. X-ray diffraction of all the films reveals the cubic phase where a decrease of cell volume is observed after ZnS addition. The average grain size also reduces after ZnS incorporation that is found from scanning electron microscopy analysis. The absorption coefficient of the films is of the order of 10 3 cm −1 in low wavelength range while a blueshifting of the absorption peak is seen due to ZnS addition. The overall resistance of the film increased with increasing ZnS concentration. An increasing bandgap from 2.3 to 2.4 eV is observed for different ZnS concentrations.

Optical and electrical properties of perovskite microrods

“…As a result, visible wavelengths are absorbed more strongly in the material. The refractive index (η) of the film was calculated from the Equation 3 [32,33],…”

A first-principles investigation of Cr adsorption on C8 and B4N4 nanocages in aqueous mediums

“…Since the absorption spectra are obtained through the electronic excitation energy of the structures, a red/blue shift of the absorption edge represents the decrease/increase of the energy gap. 53–55 The red shift of the absorption edge satisfies the reduction of the energy gap due to adsorption. The AC is related to the reflectivity by the following equations, 56–58 Abs = cεd ,Abs = −log(Tr),where Abs, Tr, and Ref stand for absorbance, transmittance, and reflectance.…”

Numerical simulation of solar cell performance with copper-based layered perovskite using SCAPS-1D software

“…This alteration results in the chemical structure of these double perovskites, which can be described as A 2 M + M 2+ X 6 , where A can represent CH(NH 2 ) + or CH 3 NH 3 + . In our research, we conducted experimental studies to examine the spectral characteristics of lead-free (CH 3 NH 3 ) 2 CuCl 4 [11,[20][21][22] PSCs.…”