Relevance of precursor molarity in the prepared bismuth oxyiodide films by successive ionic layer adsorption and reaction for solar cell application

• DOI: 10.1016/j.jsamd.2019.01.007
• Publication Date: 2019-02-04T12:28:58Z
• Authors: Anissa A. Putri; Shinya Kato; Naoki Kishi; Tetsuo Soga
• Keywords: Molar concentration; Bismuth; Quantum Efficiency; Tetragonal crystal system

Bismuth oxyiodide (BiOI) solar cells have been fabricated using a modified successive ionic layer adsorption and reaction (SILAR) method. To adjust the parameter of reaction, we involved precursor molarity variation from 2 to 10 mM in our BiOI films preparation. The successful formation has indicated by existence tetragonal phase BiI internal stretching mode XRD patterns Raman spectra, respectively. By gradual increase molarity, wide absorption redshift are observed UV-visible spectra. In addition, large growth flaky is displayed field emission scanning electron microscope (FESEM) image. These characters an impact on photovoltaic properties although monotonous enhancement cell efficiency cannot be reached rising concentration precursors. this work, found that maximum performance was achieved after initial increased. Then, it showed decrease its increasing molarity. IV analysis data confirm 7 best Jsc which up ∼2.2 mA/cm2 0.318%, Also, can result external quantum (EQE).