Synthesis and Characterization of BiOI Films for Photo-Electrochemical Cell via Simple Heating Process of BiI₃

Abstract:

This work aims to prepare BiOI films via simple heating of BiI₃ materials and study their characters from structural, optical, and morphology perspectives. In the heating process, we varied the heating treatment time. In addition, the solar cell performance of prepared BiOI films was tested. In BiOI preparation, we deposited BiI₃ films first onto FTO substrates via BiI₃ heating in the air using a closed chamber at the temperature of 360 °C for 30, 45, and 120 minutes. The deposited BiI₃ films were then rinsed with water/ethanol and re-heated at 350 °C for 30 minutes. As a result, by increasing the heating treatment time, it could form thicker BiOI films. All the resulting films confirmed the BiOI characters. A longer BiI₃ heating time could direct the growth of BiOI crystal, wavelength red-shift, and flake structure. In the electrochemical solar cell study, it was known that BiOI films had a lower performance compared to the reported results. After a certain thickness (~1.3 μm), the device's open-circuit voltage and current decreased.

• Periodical: Defect and Diffusion Forum (Volume 416)
• Pages: 159-165
• DOI: https://doi.org/10.4028/p-t098mj
• Online since: May 2022
• Authors: Anissa Adhiwena Putri*, MD Matiur Rahman, Amr Attia Abuelwafa, Shinya Kato, Naoki Kishi, Tetsuo Soga
• Keywords: BiI₃, BiOI, Heating Treatment, Semiconductor, Solar Cell

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