Analysis of sulphur deficiency defect prevalent in SILAR-CdS films

Banu, N. Nisha; Ravichandran, K.

doi:10.1007/s10854-017-6959-6

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…The observed optimum NDSSC efficiency was obtained after 10 cycles related to the uniformity, stoichiometry and band gap of the formed Cu 2 S film. As previously stated, there is a limited supply of S 2− ions from the anionic bath as the number of cycles increases [ 60 ].…”

Section: Discussionmentioning

confidence: 99%

Biosynthesis, characterization and optimization of TiO2 nanoparticles by novel marine halophilic Halomonas sp. RAM2: application of natural dye-sensitized solar cells

et al. 2023

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Background Metal oxide nanoparticles (NPs) are becoming valuable due to their novel applications. The green synthesis of TiO2 NPs is more popular as a flexible and eco-friendly method compared to traditional chemical synthesis methods. TiO2 NPs are the most commonly used semiconductor in dye-sensitized solar cells (DSSCs). Results The biogenic TiO2 NPs were produced extracellularly by the marine halophilic bacterium Halomonas sp. RAM2. Response surface methodology (RSM) was used to optimize the biosynthesis process, resulting in a starting TiO2 concentration of 0.031 M and a pH of 5 for 92 min (⁓15 nm). TiO2 NPs were well-characterized after the calcination process at different temperatures of 500, 600, 700 and 800 °C. Anatase TiO2 NPs (calcined at 500 °C) with a smaller surface area and a wider bandgap were nominated for use in natural dye-sensitized solar cells (NDSSCs). The natural dye used as a photosensitizer is a mixture of three carotenoids extracted from the marine bacterium Kocuria sp. RAM1. NDSSCs were evaluated under standard illumination. After optimization of the counter electrode, NDSSCBio(10) (10 layers) demonstrated the highest photoelectric conversion efficiency (η) of 0.44%, which was almost as good as NDSSCP25 (0.55%). Conclusion The obtained results confirmed the successful green synthesis of TiO2 NPs and suggested a novel use in combination with bacterial carotenoids in DSSC fabrication, which represents an initial step for further efficiency enhancement studies.

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Section: Discussionmentioning

confidence: 99%

Biosynthesis, characterization and optimization of TiO2 nanoparticles by novel marine halophilic Halomonas sp. RAM2: application of natural dye-sensitized solar cells

et al. 2023

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“…[27] However, excessive V S defects are deteriorative to the film quality, which can lead to reduced transmittance of the CdS film and thus decrease the light-harvesting of the absorber layer. [28][29][30] Postannealing treatments, including oxidation, sulfurization, and selenization, are effective methods to passivate sulfur vacancies. [31][32][33] Nevertheless, the increased complexity and the cost of the post-treatment process are unfavorable to the reproducibility and industrialization of solar cells.…”

Section: Introductionmentioning

confidence: 99%

Molecular Beam Epitaxy Deposition of In Situ O‐Doped CdS Films for Highly Efficient Sb₂(S,Se)₃ Solar Cells

Cai

Yang

et al. 2023

Adv Funct Materials

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Antimony selenosulfide (Sb2(S,Se)3) is considered as a promising light‐harvesting material and has been widely used in solar cells. For high‐efficiency Sb2(S,Se)3 solar cells, the most commonly used electron‐transporting layer of cadmium sulfide (CdS) is generally prepared by chemical bath deposition (CBD) approach. However, the hazardous waste liquid from the chemical bath and the sensitivity of the deposition process to the environment are challenges to practical applications. Herein, a molecular beam epitaxy deposition is reported to prepare CdS films, overcoming the drawbacks of CBD process. Furthermore, through introducing oxygen during the deposition of CdS, the sulfur vacancy defects generated in the vacuum deposition process are suppressed. The performance of Sb2(S,Se)3 solar cells is accordingly improved significantly. This improvement is attributed to the following aspects: i) the improved optical transmittance of CdS films. ii) The enhanced [hk1] orientation of Sb2(S,Se)3 absorber layer. iii) The improved heterojunction quality and suppressed carrier recombination. As a result, a power conversion efficiency of 8.59% for Sb2(S,Se)3 solar cells is achieved. This study provides a novel strategy for preparing electron‐transporting layers for efficient chalcogenide thin‐film solar cells and sheds new light on large‐area solar cell applications.

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Addressing the issue of under-utilization of precursor material in SILAR process: Simultaneous preparation of CdS in two different forms – Thin film and powder

Ravichandran¹,

Porkodi

2018

Materials Science in Semiconductor Processing

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Analysis of sulphur deficiency defect prevalent in SILAR-CdS films

Cited by 3 publications

References 21 publications

Biosynthesis, characterization and optimization of TiO2 nanoparticles by novel marine halophilic Halomonas sp. RAM2: application of natural dye-sensitized solar cells

Biosynthesis, characterization and optimization of TiO2 nanoparticles by novel marine halophilic Halomonas sp. RAM2: application of natural dye-sensitized solar cells

Molecular Beam Epitaxy Deposition of In Situ O‐Doped CdS Films for Highly Efficient Sb₂(S,Se)₃ Solar Cells

Addressing the issue of under-utilization of precursor material in SILAR process: Simultaneous preparation of CdS in two different forms – Thin film and powder

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Analysis of sulphur deficiency defect prevalent in SILAR-CdS films

Cited by 3 publications

References 21 publications

Biosynthesis, characterization and optimization of TiO2 nanoparticles by novel marine halophilic Halomonas sp. RAM2: application of natural dye-sensitized solar cells

Biosynthesis, characterization and optimization of TiO2 nanoparticles by novel marine halophilic Halomonas sp. RAM2: application of natural dye-sensitized solar cells

Molecular Beam Epitaxy Deposition of In Situ O‐Doped CdS Films for Highly Efficient Sb2(S,Se)3 Solar Cells

Addressing the issue of under-utilization of precursor material in SILAR process: Simultaneous preparation of CdS in two different forms – Thin film and powder

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Molecular Beam Epitaxy Deposition of In Situ O‐Doped CdS Films for Highly Efficient Sb₂(S,Se)₃ Solar Cells