Characteristics of p-type transparent conductive CuCrO2 thin films

Yu, Ruei-Sung; Wu, Cheng‐Yu

doi:10.1016/j.apsusc.2013.05.061

Cited by 55 publications

(33 citation statements)

References 19 publications

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“…The appropriate chemical composition, low partial pressure of oxygen, and high temperature are crucial conditions for the formation of single-phase CuCrO 2 ; 2. CuO and CuCr 2 O 4 react to form CuCrO 2 at a high process temperature [15]; 3. An oxygen partial pressure of less than 10 −3 atm and a temperature of ≥600 • C enable the formation of a single-phase CuCrO 2 structure.…”

Section: Resultsmentioning

confidence: 99%

“…Zn and Zn-related oxide structures were absent because the solid solution of Zn was in the CuCrO 2 lattice, and the doping concentration did not exceed the solubility. However, traces of CuO and CuCr 2 O 4 remained in the CuCr 1−x Zn x O 2 (x = 0.085) thin film, related to the fact that CuO and CuCr 2 O 4 are at low-temperature stable phases [15]. The phase transformation of CuCrO 2 is as follows:…”

Section: Methodsmentioning

confidence: 99%

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Synthesis and Characteristics of Zn-Doped CuCrO2 Transparent Conductive Thin Films

Chen

2019

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The effects of doping a p-type CuCrO2 film with zinc on its structural and optoelectronic properties were investigated by experiments using CuCr1−xZnxO2 thin films (x = 0, 0.025, 0.065, 0.085). An increase in the amount of zinc dopant in the thin films affected the lattice constant and increased its Gibbs free energy of phase transformation. Cross-sectional images of the CuCrO2 thin film samples exhibited a dense polygonal microstructure and a surface morphology with protruding nanoscale granules. With the increase in the amount of Zn dopant, the surface roughness decreased, thereby increasing the amount of incident photons as well as the visible-light transmittance and ultraviolet-light absorption of the thin films. With the zinc doping in the CuCrO2 thin films, the band gap increased from 3.09 to 3.11 eV. The substitution of Cr3+ with Zn2+ forms hole carriers in the crystals, which was demonstrated by X-ray photoelectron spectroscopy and Hall effect measurements. The conductivities and carrier concentrations of the Zn-doped CuCrO2 thin films were greater than those of undoped CuCrO2. The CuCr1−xZnxO2 film (x = 0.065) exhibited the best optoelectronic properties; its carrier concentration and resistivity were 1.88 × 1017 cm−3 and 3.82 Ωcm, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Synthesis and Characteristics of Zn-Doped CuCrO2 Transparent Conductive Thin Films

Chen

2019

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“…The optical bandgap was determined to be 3.00 eV and 3.08 eV for PTAA-only and CuCrO 2 -only HTL, respectively, as presented in Figure 1 d [ 45 , 46 , 48 , 49 , 50 , 60 , 61 ]. The absorption spectrum and bandgap of the optimized CuCrO 2 /PTAA layer were almost identical to those of PTAA, since a small number of CuCrO 2 nanoparticles was enough to form an effective and stable HTL layer.…”

Section: Resultsmentioning

confidence: 99%

CuCrO2 Nanoparticles Incorporated into PTAA as a Hole Transport Layer for 85 °C and Light Stabilities in Perovskite Solar Cells

et al. 2020

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High-mobility inorganic CuCrO2 nanoparticles are co-utilized with conventional poly(bis(4-phenyl)(2,5,6-trimethylphenyl)amine) (PTAA) as a hole transport layer (HTL) for perovskite solar cells to improve device performance and long-term stability. Even though CuCrO2 nanoparticles can be readily synthesized by hydrothermal reaction, it is difficult to form a uniform HTL with CuCrO2 alone due to the severe agglomeration of nanoparticles. Herein, both CuCrO2 nanoparticles and PTAA are sequentially deposited on perovskite by a simple spin-coating process, forming uniform HTL with excellent coverage. Due to the presence of high-mobility CuCrO2 nanoparticles, CuCrO2/PTAA HTL demonstrates better carrier extraction and transport. A reduction in trap density is also observed by trap-filled limited voltages and capacitance analyses. Incorporation of stable CuCrO2 also contributes to the improved device stability under heat and light. Encapsulated perovskite solar cells with CuCrO2/PTAA HTL retain their efficiency over 90% after ~900-h storage in 85 °C/85% relative humidity and under continuous 1-sun illumination at maximum-power point.

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“…89‐4927), respectively. The crystallite size of as‐synthesised CoFe 2 O 4 and NiFe 2 O 4 NPs calcined at 600°C calculated using the Debye–Scherrer equation [34] was found to be 18.9 and 17.8 nm, respectively, whereas NPs calcined at 700°C showed increase in the crystallite size with 21.5 and 21.4 nm, respectively (Fig. 2).…”

Section: Resultsmentioning

confidence: 99%

Paederia foetida Linn. promoted synthesis of CoFe ₂ O ₄ and NiFe ₂ O ₄ nanostructures and their photocatalytic efficiency

Bhuyan

Paul

et al. 2018

IET nanobiotechnol.

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A facile method of synthesis of cobalt ferrite (CoFe 2 O 4) and nickel ferrite (NiFe 2 O 4) nanoparticles (NPs) was developed using urea as a hydroxylating agent and Paederia foetida Linn. (family: Rubiaceae) leaf extract as a bio-template. The synthesised ferrite NPs were characterised in a detailed manner by powder X-ray diffraction (XRD), transmission electron microscopy, Fourier transform-infrared spectroscopy and vibrating sample magnetometer analysis. The XRD patterns revealed the formation of cubic face-centred phase for both CoFe 2 O 4 and NiFe 2 O 4 NPs. These quasi-spherical particles of CoFe 2 O 4 and NiFe 2 O 4 were shown to have sizes in the range of 10-80 and 5-50 nm, respectively. The photocatalytic activity of metal ferrites was evaluated in H 2 O 2 assisted oxidative degradation of methylene blue (MB) and rhodamine B (RhB) under irradiation of solar light. Both metal ferrite photocatalysts exhibited pronounced activity in degradation of MB and RhB, respectively, but relatively higher activity was observed for NiFe 2 O 4. After completion, the catalysts were recovered using an external magnet. Recycling of these recovered catalysts up to five times showed no noticeable change in the efficiency.

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Characteristics of p-type transparent conductive CuCrO2 thin films

Cited by 55 publications

References 19 publications

Synthesis and Characteristics of Zn-Doped CuCrO2 Transparent Conductive Thin Films

Synthesis and Characteristics of Zn-Doped CuCrO2 Transparent Conductive Thin Films

CuCrO2 Nanoparticles Incorporated into PTAA as a Hole Transport Layer for 85 °C and Light Stabilities in Perovskite Solar Cells

Paederia foetida Linn. promoted synthesis of CoFe ₂ O ₄ and NiFe ₂ O ₄ nanostructures and their photocatalytic efficiency

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Characteristics of p-type transparent conductive CuCrO2 thin films

Cited by 55 publications

References 19 publications

Synthesis and Characteristics of Zn-Doped CuCrO2 Transparent Conductive Thin Films

Synthesis and Characteristics of Zn-Doped CuCrO2 Transparent Conductive Thin Films

CuCrO2 Nanoparticles Incorporated into PTAA as a Hole Transport Layer for 85 °C and Light Stabilities in Perovskite Solar Cells

Paederia foetida Linn. promoted synthesis of CoFe 2 O 4 and NiFe 2 O 4 nanostructures and their photocatalytic efficiency

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Paederia foetida Linn. promoted synthesis of CoFe ₂ O ₄ and NiFe ₂ O ₄ nanostructures and their photocatalytic efficiency