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Pure phase synthesis of Cu₃PS₄ and Cu₆PS₅Cl for semiconductor applications.

ABSTRACT: We have achieved the first reported pure phase synthesis of two new nanoparticle materials, Cu₃PS₄ and Cu₆PS₅Cl. We have achieved this through learning about the potential reaction pathways that CuCl₂, P₂S₅, and 1-dodecanethiol can take. This study has shown that the key variable to control is the state of the phosphorus source when the CuCl₂ is added. If P₂S₅ is added together with the CuCl₂ to dodecanethiol then the reaction will follow a path to Cu₃PS₄, but if it is dissolved in dodecanethiol prior to the addition to CuCl₂ then the reaction will produce Cu₆PS₅Cl. The formation of these two different phases can occur simultaneously, yet we have found sets of conditions that manipulate the reaction system to form each phase exclusively. These nanoparticles could have broad semiconductor or solid electrolyte applications.

SUBMITTER: Graeser B

PROVIDER: S-EPMC9086726 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature

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Pure phase synthesis of Cu3PS4 and Cu6PS5Cl for semiconductor applications.

Graeser Brian B Agrawal Rakesh R

RSC advances 20180901 59

We have achieved the first reported pure phase synthesis of two new nanoparticle materials, Cu3PS4 and Cu6PS5Cl. We have achieved this through learning about the potential reaction pathways that CuCl2, P2S5, and 1-dodecanethiol can take. This study has shown that the key variable to control is the state of the phosphorus source when the CuCl2 is added. If P2S5 is added together with the ...[more]

PMID: 35548796

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Project description:Two-dimensional (2D) ternary materials recently generated interest in optoelectronics and energy-related applications, alongside their binary counterparts. To date, only a few naturally occurring layered 2D ternary materials have been explored. The plethora of benefits owed to reduced dimensionality prompted exploration of expanding non-layered ternary chalcogenides into the 2D realm. This work presents a templating method that uses 2D transition metal dichalcogenides as initiators to be converted into the corresponding ternary chalcogenide upon addition of copper, via a solution-phase synthesis, conducted in high boiling point solvents. The process starts with preparation of VSe2 nanosheets, which are next converted into Cu3VSe4 sulvanite nanosheets (NSs) which retain the 2D geometry while presenting an X-ray diffraction pattern identical with the one for the bulk Cu3VSe4. Both the scanning electron microscopy and transmission microscopy electron microscopy show the presence of quasi-2D morphology. Recent studies of the sulfur-containing sulvanite Cu3VS4 highlight the presence of an intermediate bandgap, associated with enhanced photovoltaic (PV) performance. The Cu3VSe4 nanosheets reported herein exhibit multiple UV-Vis absorption peaks, related to the intermediate bandgaps similar to Cu3VS4 and Cu3VSe4 nanocrystals. To test the potential of Cu3VSe4 NSs as an absorber for solar photovoltaic devices, Cu3VSe4 NSs thin-films deposited on FTO were subjected to photoelectrochemical testing, showing p-type behavior and stable photocurrents of up to ~ 0.036 mA/cm2. The photocurrent shows a ninefold increase in comparison to reported performance of Cu3VSe4 nanocrystals. This proves that quasi-2D sulvanite nanosheets are amenable to thin-film deposition and could show superior PV performance in comparison to nanocrystal thin-films. The obtained electrical impedance spectroscopy signal of the Cu3VSe4 NSs-FTO based electrochemical cell fits an equivalent circuit with the circuit elements of solution resistance (Rs), charge-transfer resistance (Rct), double-layer capacitance (Cdl), and Warburg impedance (W). The estimated charge transfer resistance value of 300 Ω cm2 obtained from the Nyquist plot provides an insight into the rate of charge transfer on the electrode/electrolyte interface.

Dataset Information

Pure phase synthesis of Cu₃PS₄ and Cu₆PS₅Cl for semiconductor applications.

Publications

Pure phase synthesis of Cu<sub>3</sub>PS<sub>4</sub> and Cu<sub>6</sub>PS<sub>5</sub>Cl for semiconductor applications.

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