Electrochemical deposition and characterization of ZnOS thin films for photovoltaic and photocatalysis applications

Echendu, O. K.; Werta, S. Z.; Dejene, F.B.; Crăciun, V.

doi:10.1016/j.jallcom.2018.07.327

Cited by 22 publications

(7 citation statements)

References 28 publications

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“…Also, the defects at the interface of SnO 2 /perovskite cause ionic charge accumulation and nonradiative recombination, which have an effect on the cell performance. This study explores an alternative buffer layer ZnOS in PSCs which reduced interfacial loss and enhanced device performance with less hysteresis and is promising for several reasons: it is nonhazardous to the environment and can be easily produced by solution based technique at low temperature. , The key factor of using a ZnOS layer is that it has a variable band gap energy (2.7–3.8 eV), which allows it to absorb photon with high efficiency . The successful introduction of the ZnOS layer improved the open circuit potential ( V OC ) as well as PCE of the devices.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the Interface in High Performance Planar Perovskite Solar Cell by ZnOS Thin Film

Panigrahi

Jana

et al. 2022

ACS Appl. Energy Mater.

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Charge-carrier recombination within the photoactive and charge extraction layers is one of the major obstacles to achieve high performance perovskite solar cells. Here, we demonstrate an ultrathin layer of ZnOS in between SnO2 and halide perovskite film that can effectively passivate the defects, suppressing the nonradiative recombination loss. It also helps to moderate the perovskite layer with increasing surface potential, which facilitates transferring the carriers from the perovskite to the hole transport layer, consequently providing an understanding of the bottom-up interfacial passivation of perovskite films. An enhancement of V OC ∼ 100 mV mainly causes the efficiency improvement from 17.22 to 19.4% in the combined SnO2–ZnOS based solar cell. In addition, we have performed a device modeling and theoretical analysis of these perovskite solar cells with and without the passivation layer. Theoretical results for the electronic band structure indicate that ZnOS contains an intermediate band structure between SnO2 and perovskite resulting in a much better band bending for the SnO2–ZnOS based solar cells. It is observed that the numerical results are in good agreement with the experimental outcomes. The combined electron transport layer strategy provides a way for defect passivation for further efficiency enhancement of the perovskite solar cells through interface engineering.

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Section: Introductionmentioning

confidence: 99%

Tailoring the Interface in High Performance Planar Perovskite Solar Cell by ZnOS Thin Film

Panigrahi

Jana

et al. 2022

ACS Appl. Energy Mater.

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“…As the common device architecture of perovskite solar cells constitutes a perovskite absorber material sandwiched between an electron transport layer (ETL) and a hole transport layer (HTL), researchers are also opting for non-toxic choices for the transport layers. Zinc oxysulphide (ZnOS) is being investigated as a wide bandgap [ 19 ] alternative for the commonly used CdS buffer layers in solar cells due to the carcinogenicity of CdS. Using ZnOS buffer layer with the appropriate deposition process is expected to positively affect the stability and the efficiency of the solar cell as well as improve the J sc and PCE [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

“…Zinc oxysulphide (ZnOS) is being investigated as a wide bandgap [ 19 ] alternative for the commonly used CdS buffer layers in solar cells due to the carcinogenicity of CdS. Using ZnOS buffer layer with the appropriate deposition process is expected to positively affect the stability and the efficiency of the solar cell as well as improve the J sc and PCE [ 19 , 20 ]. Korir et al [ 21 ] claimed better PCE , J sc , V oc for ZnOS (11.54%, 18.50 mAcm −2 , 0.99 V, respectively) compared to TiO 2 (10.22%, 0.97 V, 16.50 mAcm −2 respectively) while comparing the performance of both materials used in the same cell structure.…”

Section: Introductionmentioning

confidence: 99%

Optimization of a high-performance lead-free cesium-based inorganic perovskite solar cell through numerical approach

Tulka

Alam

Akhtaruzzaman

et al. 2022

Heliyon

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“…These materials can be obtained as particulate materials (core-shell or composites) and thin films when deposited on alternating layers [2,3]. The use of thin films stands out in comparison to particulate materials because they do not generate residues after being treated, and they are easy to be reused [4]. Thin films can be obtained by various methods, such as atomic layer positioning [5], dip-coating [6], spin coating [7], and spray-pyrolysis [8].…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature on the photocatalytic properties of TiO2-CeO2 multilayer thin films obtained by spin coating method

et al. 2020

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TiO2-CeO2 multilayer thin films were deposited by the spin coating method and calcined at 500 and 700 °C. Thin films were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), atomic force microscopy (AFM), and diffuse reflectance spectroscopy. Photocatalytic properties were estimated by varying the concentration of the methylene blue dye (MB) when illuminated by UV radiation. The XRD patterns showed that the temperatures of 500 and 700 °C were effective to obtain TiO2 and CeO2 phases. The difference in the homogeneity of TiO2 and CeO2 films was evident in the AFM images, where the films showed an average roughness of 2.0 and 5.3 nm, respectively. The CeO2-TiO2 thin film obtained at 700 °C showed the best photocatalytic activity, reducing the concentration of MB by approximately 80%, while the CeO2 and TiO2 films obtained at 700 °C reduced only 20% and 29%, respectively. The reuse test showed that the thin films maintained their photocatalytic activity after 4 cycles, and there was no need for thermal treatment, indicating that it is an immobilized photocatalyst with high efficiency in the degradation of organic dyes.

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Electrochemical deposition and characterization of ZnOS thin films for photovoltaic and photocatalysis applications

Cited by 22 publications

References 28 publications

Tailoring the Interface in High Performance Planar Perovskite Solar Cell by ZnOS Thin Film

Tailoring the Interface in High Performance Planar Perovskite Solar Cell by ZnOS Thin Film

Optimization of a high-performance lead-free cesium-based inorganic perovskite solar cell through numerical approach

Effect of temperature on the photocatalytic properties of TiO2-CeO2 multilayer thin films obtained by spin coating method

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