One‐Step Synthesis of (CH 3 NH 3 ) 2 CuCl 4 :ZnS Thin Film for Optoelectronic Applications

• Published in: Crystal research and technology (1979) 2022-04, Vol.57 (4)
• Main Authors: Ahmed, Mohammad Tanvir, Islam, Shariful, Bashar, Muhammad Shahriar, Ahmed, Farid
• Format: Article
• Language: English
• ISSN: 0232-1300; 1521-4079
• DOI: 10.1002/crat.202100235

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.