A study on solution deposited CuSCN thin films: Structural, electrochemical, optical properties

Ezealigo, Blessing N.; Nwanya, Assumpta C.; Simo, A.; Bucher, R.; Osuji, R. U.; Mâaza, M.; Reddy, M. V.; Ezema, Fabian I.

doi:10.1016/j.arabjc.2017.04.013

Cited by 34 publications

(22 citation statements)

References 50 publications

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“…It has been reported that β-phase is more stable and is easily accessible. The α- and β-phase can be classified as orthorhombic and hexagonal or rhombohedral structure, respectively [37]. Unlike other inorganic HTMs such as Cu 2 O, NiO and SnO, CuSCN is an efficient hole injection/extraction material as well as an electron blocking material due to its appropriate electronic levels.…”

Section: Synthesis and Deposition Of Cuscn Htmmentioning

confidence: 99%

Progress on the Synthesis and Application of CuSCN Inorganic Hole Transport Material in Perovskite Solar Cells

2018

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P-type wide bandgap semiconductor materials such as CuI, NiO, Cu2O and CuSCN are currently undergoing intense research as viable alternative hole transport materials (HTMs) to the spiro-OMeTAD in perovskite solar cells (PSCs). Despite 23.3% efficiency of PSCs, there are still a number of issues in addition to the toxicology of Pb such as instability and high-cost of the current HTM that needs to be urgently addressed. To that end, copper thiocyanate (CuSCN) HTMs in addition to robustness have high stability, high hole mobility, and suitable energy levels as compared to spiro-OMeTAD HTM. CuSCN HTM layer use affordable materials, require short synthesis routes, require simple synthetic techniques such as spin-coating and doctor-blading, thus offer a viable way of developing cost-effective PSCs. HTMs play a vital role in PSCs as they can enhance the performance of a device by reducing charge recombination processes. In this review paper, we report on the current progress of CuSCN HTMs that have been reported to date in PSCs. CuSCN HTMs have shown enhanced stability when exposed to weather elements as the solar devices retained their initial efficiency by a greater percentage. The efficiency reported to date is greater than 20% and has a potential of increasing, as well as maintaining thermal stability.

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Section: Synthesis and Deposition Of Cuscn Htmmentioning

confidence: 99%

Progress on the Synthesis and Application of CuSCN Inorganic Hole Transport Material in Perovskite Solar Cells

2018

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“…Optical properties of CuSCN (n = 2.2, k = 0.02) used in the modeling, were assumed from literature ref. 46 . UV-Vis-NIR absorption spectra of the CuSCN-NP suspensions used for Tauc plot calculation were recorded on a Cary5000 Varian spectrometer.…”

Section: Methodsmentioning

confidence: 99%

Moisture resistance in perovskite solar cells attributed to a water-splitting layer

et al. 2021

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Commercialization of lead halide perovskite-based devices is hindered by their instability towards environmental conditions. In particular, water promotes fast decomposition, leading to a drastic decrease in device performance. Integrating water-splitting active species within ancillary layers to the perovskite absorber might be a solution to this, as they could convert incoming water into oxygen and hydrogen, preserving device performance. Here, we suggest that a CuSCN nanoplatelete/p-type semiconducting polymer composite, combining hole extraction and transport properties with water oxidation activity, transforms incoming water molecules and triggers the in situ p-doping of the conjugated polymer, improving transport of photocharges. Insertion of the nanocomposite into a lead perovskite solar cell with a direct photovoltaic architecture causes stable device performance for 28 days in high-moisture conditions. Our findings demonstrate that the engineering of a hole extraction layer with possible water-splitting additives could be a viable strategy to reduce the impact of moisture in perovskite devices.

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“…Both values are in good agreement with previously published data further supporting the successful synthesis and presence of CuSCN atop the glass substrate. [ 35,39,40 ]…”

Section: Optical Characterization Of Cuscnmentioning

confidence: 99%

“…Both values are in good agreement with previously published data further supporting the successful synthesis and presence of CuSCN atop the glass substrate. [35,39,40] For comparison, similar measurements were performed on a CuSCN layer grown from a DES solution. Figure S1, Supporting Information displays the transmittance of CuSCN layers grown from DES and aqueous ammonia together with the Tauc plots for the former layer.…”

Section: Optical Characterization Of Cuscnmentioning

confidence: 99%

A Low‐Power CuSCN Hydrogen Sensor Operating Reversibly at Room Temperature

Kabitakis

Gagaoudakis

Moschogiannaki

et al. 2021

Adv Funct Materials

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Hydrogen is attractive as an abundant source for clean and renewable energy. However, due to its highly flammable nature in a range of concentrations, the need for reliable and sensitive sensor/monitoring technologies has become acute. Here a solid-state hydrogen sensor based on solution-processable p-type semiconductor copper thiocyanate (CuSCN) is developed and studied. Sensors incorporating interdigitated electrodes made of noble metals (gold, platinum, palladium) show excellent response to hydrogen concentration down to 200 ppm while simultaneously being able to operate reversibly at room temperature and at low power. Sensors incorporating Pd electrodes show the highest signal response of 179% with a response time of ≈400 s upon exposure to 1000 ppm of hydrogen gas. The experimental findings are corroborated by density functional theory calculations, which highlight the role of atomic hydrogen species created upon interaction with the noble metal electrode as the origin for the increased p-type conductivity of CuSCN during exposure. The work highlights CuSCN as a promising sensing element for low-power, all-solid-state printed hydrogen sensors.

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A study on solution deposited CuSCN thin films: Structural, electrochemical, optical properties

Cited by 34 publications

References 50 publications

Progress on the Synthesis and Application of CuSCN Inorganic Hole Transport Material in Perovskite Solar Cells

Progress on the Synthesis and Application of CuSCN Inorganic Hole Transport Material in Perovskite Solar Cells

Moisture resistance in perovskite solar cells attributed to a water-splitting layer

A Low‐Power CuSCN Hydrogen Sensor Operating Reversibly at Room Temperature

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