Effect of Dip-Coating Cycles on the Structural and Performance of ZnO Thin Film-based DSSC

Toe, May Zin; Pung, Swee‐Yong; Yaacob, Khatijah Aisha; Han, Soe Soe

doi:10.1007/s13369-021-05418-9

Cited by 12 publications

(7 citation statements)

References 47 publications

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“…It is worth to note that in both cases, samples with a deposition cycle of 50 and 60 showed the highest intensity of the diffraction peak. This indicates that the crystallinity quality of ZnO films cultivated with an increase of cycle number (see Table 1 ), which was also discussed in previously published studies 39 , 40 . The crystal sizes (D) of ZnO structures were appreciated by using the well-known of Debye–Scherrer equation 41 as follows: where is the wavelength of the incident X-ray ( ), is the full width at half maximum (FWHM), and is the diffraction angle at which the peak of a particular orientation occurs.…”

Section: Resultssupporting

confidence: 85%

Effect of thickness and reaction media on properties of ZnO thin films by SILAR

Yergaliuly

Soltabayev

Kalybekkyzy

et al. 2022

Sci Rep

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Zinc oxide (ZnO) is one of the most promising metal oxide semiconductor materials, particularly for optical and gas sensing applications. The influence of thickness and solvent on various features of ZnO thin films deposited at ambient temperature and barometric pressure by the sequential ionic layer adsorption and reaction method (SILAR) was carefully studied in this work. Ethanol and distilled water (DW) were alternatively used as a solvent for preparation of ZnO precursor solution. Superficial morphology, crystallite structure, optical and electrical characteristics of the thin films of various thickness are examined applying X-ray diffraction (XRD) system, scanning electron microscopy, the atomic force microscopy, X-ray photoelectron spectroscopy, ultraviolet–visible spectroscopy, photoluminescence spectroscopy, Hall effect measurement analysis and UV response study. XRD analysis confirmed that thin films fabricated using ethanol or DW precursor solvents are hexagonal wurtzite ZnO with a preferred growth orientation (002). Furthermore, it was found that thin films made using ethanol are as highly crystalline as thin films made using DW. ZnO thin films prepared using aqueous solutions possess high optical band gaps. However, films prepared with ethanol solvent have low resistivity (10–2 Ω cm) and high electron mobility (750 cm2/Vs). The ethanol solvent-based SILAR method opens opportunities to synthase high quality ZnO thin films for various potential applications.

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Section: Resultssupporting

confidence: 85%

Effect of thickness and reaction media on properties of ZnO thin films by SILAR

Yergaliuly

Soltabayev

Kalybekkyzy

et al. 2022

Sci Rep

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“…In our research, we successfully achieved a higher fill factor (FF) of around 0.42-0.51 compared to other research works. Kouhestanian et al reported FFs of around 0.34-0.43, and May et al [33] reported FFs of 0.34-0.47. Increasing the shunt resistance (R sh ) and decreasing the series resistance (R s ) lead to a higher fill factor, thus resulting in greater efficiency.…”

Section: Discussionmentioning

confidence: 98%

“…The DSSC's efficiency is affected by several factors, including the counter-electrode materials, dye species, electrolyte type, and photoanode morphology and structure [32]. One of the most crucial factors is the structure of the photoanode, such as the photoanode layer thickness, which controls the collection and transportation of photo-excited electrons from dye molecules to the external circuit [33,34]. Thus, the modification of the ZnO photoanode thin-film layer thickness is one of the essential strategies to improve the efficiency of DSSCs [17,35].…”

Section: Introductionmentioning

confidence: 99%

Controlling the Layer Thickness of Zinc Oxide Photoanode and the Dye-Soaking Time for an Optimal-Efficiency Dye-Sensitized Solar Cell

et al. 2022

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Dye-sensitized solar cells (DSSCs) were developed by exploiting the photovoltaic effect to convert solar energy into electrical energy. The photoanode layer thickness significantly affects the semiconductor film’s ability to carry electronic charges, adsorb sensitizing dye molecules, and lower the recombination of photo-excited electrons injected into the semiconductor. This study investigated the dependence of the zinc oxide (ZnO) photoanode thin-film thickness and the film soaking time in N719 dye on the photocurrent–voltage characteristics. The ZnO photoanode was applied to glass using the doctor blade method. The thickness was varied by changing the scotch tape layers. The ZnO-based DSSC attained an efficiency of 2.77% with three-layered photoanodes soaked in the dye for three hours, compared to a maximum efficiency of 0.68% that was achieved with three cycles using the dip-coating method in other research. The layer thickness of the ZnO photoanode and its optimal adsorption time for the dye are important parameters that determine the efficiency of the DSSC. Therefore, this work provides important insights to further improve the performance of DSSCs.

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“…Where D is the average crystalline size, K is the shape factor (0.9 ), 𝜆 is the wavelength of x-ray (0.15406 nm), 𝛽 is the full width at half maximum (FWHM) in radian and 𝜃 is the Bragg angle in radian. The lattice constants (𝑎 𝑎𝑛𝑑 𝑐) can be calculated by using the relations (3) and ( 4 It is clear from XRD patterns that the intensity of peaks increased with the increase of the deposition cycles, which reveals an enhancement of crystallinity by an increasing number of deposition cycles that may be attributed to the increase number of deposition cycles results in improvement of nucleation and crystal formation [21,25,26].…”

Section: Films' Thicknessmentioning

confidence: 99%

The effect of deposition cycles on structural, morphological, optical and gas detection properties of Mg doped ZnO thin films

Abood

Sable

Yaseen

et al. 2023

J. Phys.: Conf. Ser.

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In this study, Mg doped ZnO thin films were successfully prepared using the modified SILAR approach throughout various numbers of deposition cycles. XRD data shows the prepared films have a ZnO wurtzite hexagonal structure. The crystalline size and crystallinity were found to be increased by increasing the number of deposition cycles. FESEM showed there are nanoparticles and nanorods on the surface, with random distribution in the case of the sample synthesized with 30 cycles, while the agglomeration of nanoparticles to form a maize-like structure and flower-like morphology was predominant in the case of the sample with 40 cycles. The UV-VIS transmittance spectra showed a decrease in transmittance by increasing the number of deposition cycles, and the increment of energy band gap by increasing the number of deposition cycles was found. The response of the samples towards NO2 gas at 200 °C operating temperature was found to be enhanced in the case of the sample prepared at 40 cycles as compared to the sample prepared at 30 cycles.

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Effect of Dip-Coating Cycles on the Structural and Performance of ZnO Thin Film-based DSSC

Cited by 12 publications

References 47 publications

Effect of thickness and reaction media on properties of ZnO thin films by SILAR

Effect of thickness and reaction media on properties of ZnO thin films by SILAR

Controlling the Layer Thickness of Zinc Oxide Photoanode and the Dye-Soaking Time for an Optimal-Efficiency Dye-Sensitized Solar Cell

The effect of deposition cycles on structural, morphological, optical and gas detection properties of Mg doped ZnO thin films

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