Synthesis and annealing process of ultra-large SnS nanosheets for FTO/SnS/CdS/Pt photocathode

Wu, Chuangsheng; Yao, Kefeng; Guan, Yongsheng; Ali, Omar Abdulsada; Cao, Meng; Huang, Jian; Lai, Jianming; Shi, Wangzhou; Hu, Guangfu; Wang, Linjun; Shen, Yue

doi:10.1016/j.mssp.2019.01.008

Cited by 8 publications

(4 citation statements)

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“…In an investigation of different overlayers, TiO 2 , Nb 2 O 5 , and Ta 2 O 5 were investigated by Vequizo et al on pulse electrodeposited SnS thin films, and Nb 2 O 5 was found to have the optimum CBM for charge carrier separation and activity for H 2 evolution . Other studies have utilized CdS and TiO 2 as overlayers to enhance charge separation. − SnO is found to passivate SnS surface traps, which reduces carrier recombination and increases the photocurrent. , …”

Section: Applicationsmentioning

confidence: 99%

Emerging Chalcogenide Thin Films for Solar Energy Harvesting Devices

et al. 2021

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Chalcogenide semiconductors offer excellent optoelectronic properties for their use in solar cells, exemplified by the commercialization of Cu(In,Ga)Se 2 -and CdTe-based photovoltaic technologies. Recently, several other chalcogenides have emerged as promising photoabsorbers for energy harvesting through the conversion of solar energy to electricity and fuels. The goal of this review is to summarize the development of emerging binary

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Section: Applicationsmentioning

confidence: 99%

Emerging Chalcogenide Thin Films for Solar Energy Harvesting Devices

et al. 2021

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“…Among them, Sn-based chalcogenides composed of nontoxic and earth-abundant elements are promising candidates. , In particular, orthorhombic herzenbergite tin monosulfide (SnS) has an anisotropic two-dimensional (2D) layered orthorhombic crystal structure (space group: Pbnm ) in which in-plane covalent bonds are present, while van der Waals bonds exist vertically along the [010] direction. − SnS has a suitable band gap (1.3 eV) for visible-light harvesting and exhibits a high hole mobility (∼90 cm 2 V –1 s –1 , ⊥ to the [010] axis), appropriate carrier concentrations (10 14 –10 17 cm –3 ), and a high optical absorption coefficient of 10 5 cm –1 in the visible region of the solar spectrum. − The theoretical photocurrent density of −38 mA cm –2 can be achieved using orthorhombic SnS-based photocathodes, assuming a band gap of 1.3 eV and 100% incident photon-to-current conversion under simulated AM 1.5G solar irradiation. Despite these promising characteristics, the photocurrent density of SnS-based photocathodes reported to date is insufficient for application to real PEC devices. − …”

Section: Introductionmentioning

confidence: 99%

High-Performance Phase-Pure SnS Photocathodes for Photoelectrochemical Water Splitting Obtained via Molecular Ink-Derived Seed-Assisted Growth of Nanoplates

Lee

Yang

Tan

et al. 2020

ACS Appl. Mater. Interfaces

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Although tin monosulfide (SnS) is one of the promising earth-abundant semiconducting materials for photoelectrochemical water splitting, the performance of SnS photocathodes remains poor. Herein, we report a stepwise approach for the fabrication of highly efficient photocathodes based on SnS nanoplates via elaborate modulation of molecular solutions. It is demonstrated that phase-pure SnS nanoplates without detrimental secondary phases (such as SnS 2 and Sn 2 S 3 ) can be readily obtained by adjusting the amounts of Sn and S in the precursor solution. Additionally, the orientation of SnS nanoplates is controlled by implementing different types of SnS seed layers. The orientations of the SnS seed layers are changed according to the molecular shapes of the Sn− S bonds in the molecular solutions, depending on the relative nucleophilicity of the molecular moieties formed by specific thiol−amine reactions. The molecular Sn−S sheets in the seed ink was obtained by the reaction in a solvent mixture of thiogylcolic acid and ethanolamine. By contrast, the short Sn−S molecular rods result from the reaction in a solvent mixture of 2-mercaptoethanol and ethylenediamine. Interestingly, the relatively short rodlike morphology of the SnS seed induces the growth of SnS nanostructures faceted by preferred ( 111) and (101) planes, leading to fast charge transport. With the formation of a proper band alignment with n-type CdS and TiO 2 , the preferred (111)-and (101)-oriented SnS nanoplatebased photocathode exhibited a photocurrent density of −19 mA cm −2 at 0 V versus a reversible hydrogen electrode, establishing a new benchmark for SnS photocathodes.

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“…For pyrolysis, a common method is to adsorb the metal complexes with N-ligand onto the porous support, followed by a pyrolysis step of the metal-organic framework, covalent organic framework ( Liu et al., 2019a ). For example, it is widely reported that the Co and Fe atoms can coordinate with the N from the support materials to form the Co-N and Fe-N atomic dispersion structure ( Wang et al., 2019d ; Wu et al., 2019a ; Zhang et al., 2021c ; Zhu et al., 2017 ). To synthesize such SACs, generally, the nitrogen/metal precursors and the carbon supports will be pyrolyzed and carbonized under inert atmospheres at a quite high temperature.…”

Section: The Synthesis Strategies Of Sapmentioning

confidence: 99%