A simple spin-assisted SILAR of bismuth oxyiodide films preparation for photovoltaic application

Abstract

Bismuth oxyiodide (BiOI) films have been successfully fabricated from Bi(NO 3) 3 and KI precursors at room temperature via facile successive ionic layer adsorption and reaction assisted with spin-coating (spin-SILAR). In our work, the uniform and dense BiOI layer was easily formed in a shorter time by more environmentally friendly process. X-ray diffraction, Raman spectroscopy, and field emission scanning electron microscope (FESEM) were used to study the crystal structure and surface morphology of BiOI films. The absorption spectra in the UV-vis-NIR regions were also measured using spectrophotometric measurement in the wavelength range, from 300 to 2000 nm for clarifying the properties of resulted BiOI/ FTO films. From the experiment, we obtained the short-circuit current density of BiOI films in the FTO/glass substrates which up to 0.612 mA/cm 2. Although the superior solar cell performance was not exhibited by our BiOI films, due to the benefit of spin-SILAR method, it may open up the further application of BiOI films prepared through this method.

Fast fabrication of bismuth oxyiodide/carbon‐nanofibers composites for efficient anti‐proliferation of liver and breast cancer cells

“…The SEM images (Figure 2) presented nanosheets assembled to form a rose‐like configuration. The obtained results resemble the conventional flaky structure of BiOI mentioned in previous literature [39,40] . Compared with earlier studies, the pure BiOI‐nanosheets prepared by FRM were thinner than what as they did not exceed 15 nm.…”

Potential application of bismuth oxyiodide (BiOI) when it meets light

“…Another simple deposition method for the BiOI thin films is successive ionic layer adsorption and reaction (SILAR). 64,65 Successively immersing in or dropping the Bi(NO 3 ) 3 5H 2 O and KI precursor solution resulted in the formation of BiOI films. The deposition parameters effectively determined the surface morphology of BiOI.…”

All-solution-processed environment-friendly solid-state BiOI photovoltaic cell with high-short-circuit current by successive ionic layer adsorption and reaction (SILAR)

“…Here, cation source: Bi(NO 3 ) 3 .5H 2 O and anion source: KI and deionized water were used for different SILAR cycle number and after completing the desire cycle number, all the samples have been annealed for 10 min at 100°C. The detailed SILAR procedure and the fundamental material properties of BiOI, such as band gap are reported in our previous papers [10,11,27,28,37]. Here, the investigation of absorber layer morphology has been conducted via a scanning electron microscopy (SEM, JSM-6510).…”

“…BiOI has been being employed as an absorber layer in the photovoltaic cell since the band gap is about 1.7 -1.8 eV which is matching with the solar light spectrum. Many works of literature endorse that most of the reported cell structure is electrochemicalbased cell using BiOI/electrolyte junction so far [27,28]. However, there is a concern regarding the cell's stability; therefore, very few alternative solidstate BiOI-based solar cells have been fabricated via thermal chemical vapor deposition (CVD) at 350°C [13].…”

“…As for the thin film deposition method, many research articles have reported various synthesis techniques such as CVD [13], chemical bath deposition (CBD) [30], sol-gel method [31], spin coating [27] and dual-port ultrasonic spray pyrolysis technique [32], successive ionic layer adsorption and reaction (SILAR) process [10,[32][33][34][35] to produce BiOI thin films. To fabricate the BiOI solar cell at low cost in the future, all-solution process without using vacuum at low temperature is preferable.…”