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Structural, chemical, morphological and optical properties of thin films based on potassium bis(2-methyllactato) borate hemihydrate doped by iodine

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Abstract

Complex composite films of potassium bis(2-methyllactato) borate hemihydrate (KMB) doped with iodine (I2) were dip-synthesized on glass substrates in this work. The chemical, crystal, and morphological structures were investigated. Introducing I2 into KMB host matrix forms KI molecules in the KMB complex composite, which increases the crystallite size and the microstrain in the film structure and consequently influences their optical and electrical properties. Introducing I2 into KMB films leads to a decrease in the bandgap energy due to forming polarons between the valance and conduction bands. Introducing I2 to KMB increases the sheet resistance. However, the conductivity of KMB and KMB-doped I2 films has an inverse behaviour with the sheet resistance, which is attributed to decreasing the K+ ions in KMB films due to forming KI molecules in the KMB-I2 films. Based on the properties achieved in this work, KMB/I2 complex composite films are feasible to be used in optoelectronic, photonic, and organic optical devices.

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Data availability

The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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Materials described in the manuscript, including all relevant raw data, will be freely available to any researcher wishing to use them for non-commercial purposes by contacting the corresponding author of the manuscript, without breaching participant confidentiality.

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Acknowledgements

The authors would like to acknowledge Jordan University of Science and Technology (JUST) in Jordan, the Deanship of Scientific research, particularly for the support. We thank Prof. Mohammad-Ali H. Al-Akhras for helping our members use his biomedical laboratories.

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This research received no external funding.

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QMA-B, AAA, AMA, IAA, ADT were involved in conceptualization, methodology, investigation, data curation, formal analysis, writing—original draft, visualization, validation, and writing—review & editing; AAA, AMA contributed to funding acquisition, project administration, resources and supervision. All authors have read and agreed to the published version of the manuscript.

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Correspondence to Ahmad M. Alsaad.

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Al-Bataineh, Q.M., Ahmad, A.A., Alsaad, A.M. et al. Structural, chemical, morphological and optical properties of thin films based on potassium bis(2-methyllactato) borate hemihydrate doped by iodine. J Mater Sci: Mater Electron 33, 20778–20789 (2022). https://doi.org/10.1007/s10854-022-08887-2

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