Cathodic electrodeposition of CuSCN thin films

Okabe, K.; Selk, Yvonne; Oekermann, Torsten; Yoshida, Tsukasa

doi:10.14723/tmrsj.33.1325

Cited by 10 publications

(18 citation statements)

References 17 publications

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“…Cathodic electrodeposition of CuSCN thin films has already been well established and understood. 9,11,16,23 A 1:1 complex between Cu 2+ and SCN – ions, denoted as [Cu(SCN)] + , is spontaneously formed by dissolving equal molar amounts of Cu(ClO 4 ) 2 and LiSCN in alcohol such as methanol and ethanol. This complex is the active species to be reduced at the electrode to precipitate CuSCN with a Faradic efficiency of practically 100%.…”

Section: Resultsmentioning

confidence: 99%

“…This complex is the active species to be reduced at the electrode to precipitate CuSCN with a Faradic efficiency of practically 100%. 16,23 Since charge transfer is fast, this reaction is solely limited by the transport of [Cu(SCN)] + even in the presence of dyes to hybridize. 23,24 For this reason, we employ a rotating disk electrode (RDE) to control mass transport by homogeneous forced convection.…”

Section: Resultsmentioning

confidence: 99%

“…This complex is the active species to be reduced at the electrode to precipitate CuSCN with a Faradic efficiency of practically 100%. 16,23 [ ] + →…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Concerted Photoluminescence of Electrochemically Self-Assembled CuSCN/Stilbazolium Dye Hybrid Thin Films

et al. 2019

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Hybrid thin films of crystalline CuSCN and 4-( N , N -dimethylamino)-4′-( N ′-methyl)stilbazolium (DAS) in three distinctively different nanostructures were obtained by electrochemical self-assembly from a single pot containing all the chemical ingredients. Their optical properties for UV–vis-NIR absorption, photoluminescence (PL), and PL excitation spectra were examined between 77 and 298 K, in comparison with solution and solid powder of DAS tosylate (DAST). Unlike all other dyes we tested before, PL of DAS was not quenched but rather enhanced when hybridized with CuSCN. DAST exhibited a strong exciton–phonon coupling to weaken, broaden, and red shift PL at room temperature, so that it inversely is strongly enhanced, sharpened, and blue-shifted at 77 K. The PL of the same dye in the hybrid thin film, however, shows a slight red shift and only a moderate enhancement at reduced temperatures due to strong exciton stabilization in dielectric environment of CuSCN and concerted PL by energy transfer from CuSCN to DAS luminophore, making it a unique nearly temperature-independent luminescent material.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Concerted Photoluminescence of Electrochemically Self-Assembled CuSCN/Stilbazolium Dye Hybrid Thin Films

et al. 2019

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“…Okabe et al have carried out studies on the complex mechanism of cathodic electrodeposition of CuSCN from mixed solution containing Cu 2+ and SCNions [11]. Complex of Cu 2+ and SCNin 1 to 1 composition forms in the solution and acts as the active species.…”

Section: Influence Of Qcg To Cuscn Growthmentioning

confidence: 99%

Cathodic electrodeposition of ZnO and CuSCN thin films in the presence of glutathione

Sun

Yoshida

2009

Trans. Mat. Res. Soc. Japan

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The effect of a tripeptide molecule glutathione (γ-L-glutamyl-L-cysteniylglycine, QCG) is studied as a structure-directing agents (SDA) for cathodic electrodeposition of ZnO and CuSCN from aqueous solutions, which are known to be wide bandgap semiconductors of n and p types, respectively. From experiences, hard Lewis basic-COOH group act as an anchor to the hard Lewis acidic Zn(II) sites of ZnO, whereas soft Lewis basic groups such as-SH and-NH 2 are expected to interact with soft Lewis acidic Cu(I) sites of CuSCN. QCG have all these anchoring groups within its structure and was found to affect the growth of both ZnO and CuSCN, leading to alteration of crystallographic orientations and evolution of unique nanostructures.

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“… 6 We have been seeking to perform cathodic electrodeposition of CuSCN, a p-type, wide-bandgap semiconductor, into highly crystallized thin films at low temperature. 7 − 10 CuSCN has been frequently used as a hole conductor in nanostructured solar cells 11 − 16 and also as a sensitized photocathode in combination with hole-injecting dyes. 5 , 10 , 17 , 18 Therefore, ESA of CuSCN-based hybrid thin films could serve nicely as a counterpart to the well-established ZnO-based hybrid systems.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Self-Assembly of Nanostructured CuSCN/Rhodamine B Hybrid Thin Film and Its Dye-Sensitized Photocathodic Properties

et al. 2014

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Nanostructured hybrid thin films of CuSCN and rhodamine B (RB) are electrochemically self-assembled (ESA) by cathodic electrolysis in an ethanol/water mixture containing Cu2+, SCN–, and RB. By selecting the solvent, Cu2+/SCN– ratio, and the concentration of RB, we demonstrate several control parameters in the film formation. High loading of RB into the film has been achieved to reach a CuSCN:RB volume ratio of approximately 2:1. The RB solid could almost completely be extracted from the hybrid film by soaking the film in dimethylacetamide (DMA), leading to a large increase of the surface area. The crystallographic orientation of the nanostructure with respect to the substrate can be controlled. Efficient quenching of fluorescence of RB has been observed for the CuSCN/RB hybrid film, implying hole injection from RB excited state to CuSCN. Photoelectrochemical study on the porous crystalline CuSCN obtained after the DMA treatment and sensitized with RB revealed sensitized photocathodic action under visible light illumination, indicating the potential usefulness of the porous CuSCN electrodes for construction of tandem dye-sensitized solar cells.

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Cathodic electrodeposition of CuSCN thin films

Cited by 10 publications

References 17 publications

Concerted Photoluminescence of Electrochemically Self-Assembled CuSCN/Stilbazolium Dye Hybrid Thin Films

Concerted Photoluminescence of Electrochemically Self-Assembled CuSCN/Stilbazolium Dye Hybrid Thin Films

Cathodic electrodeposition of ZnO and CuSCN thin films in the presence of glutathione

Electrochemical Self-Assembly of Nanostructured CuSCN/Rhodamine B Hybrid Thin Film and Its Dye-Sensitized Photocathodic Properties

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