Nickel Oxide Monodispersed Quantum Dots as Hole Transport Layer in n–i–p Hybrid Perovskite Solar Cells

Kotta, Ashique; Seo, Hyung‐Kee

doi:10.1166/jno.2019.2660

Cited by 6 publications

(5 citation statements)

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“…Figure a,b demonstrates an overlay of XRD diffraction peaks of the NiO/Ag/TiO 2 , TiO 2 , Ag/TiO 2 , and NiO/TiO 2 nanocomposites. Figure c shows the XRD diffraction pattern of NiO/Ag/TiO 2; the observed peaks are assigned to the tetragonal rutile TiO 2 phase only, with no other phase of TiO 2, Ag (JCPDS data number 04-0783), or NiO (JCPDS data number 98-002-4014) . A careful comparison of the XRD patterns for NiO/Ag/TiO 2 , TiO 2 , Ag/TiO 2 , and NiO/TiO 2 nanocomposites showed a rightward shift in the peaks of NiO/Ag/TiO 2 (Figure a,b).…”

Section: Resultsmentioning

confidence: 98%

“…Figure 2c shows the XRD diffraction pattern of NiO/Ag/TiO 2; the observed peaks are assigned to the tetragonal rutile TiO 2 phase only, with no other phase of TiO 2, Ag (JCPDS data number 04-0783), 43 or NiO (JCPDS data number 98-002-4014). 44 A careful comparison of the XRD patterns for NiO/Ag/TiO 2 , TiO 2 , Ag/TiO 2 , and NiO/TiO 2 nanocomposites showed a rightward shift in the peaks of NiO/Ag/TiO 2 (Figure 2a,b). This rightward shift indicates a slight contraction in the lattice structure.…”

Section: Catalyst Characterizationmentioning

confidence: 97%

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Visible Light Photocatalytic Degradation of Methylene Blue Dye and Pharmaceutical Wastes over Ternary NiO/Ag/TiO₂ Heterojunction

Mohammed,

Matalkeh,

Al Soubaihi

et al. 2023

ACS Omega

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Ternary NiO/Ag/TiO 2 heterojunction photocatalyst was prepared by deposition coprecipitation for visible light photocatalytic applications. Physicochemical properties of the synthesized NiO/Ag/TiO 2 composite were characterized by X-ray diffraction, Brunauer−Emmett− Teller surface area measurement method, transmission electron microscopy, energy-dispersive X-ray spectroscopy techniques, X-ray photoelectron spectroscopy technique, and ultraviolet−visible absorption spectroscopy. The results suggest that the well-dispersed small metallic silver nanoparticles (<3 nm) facilitate electron transfer and bridge nickel oxide and titanium oxide. The photocatalytic degradation and the methylene blue (MB) dye kinetics were carried out on a ternary NiO/Ag/TiO 2 composite and compared to bare TiO 2 under visible light irradiation. The results indicate that NiO/Ag/TiO 2 has superior MB photodegradation efficiency with a high reaction rate constant and low degradation time (93.15% within 60 min) compared to Ag/TiO 2 , NiO/TiO 2 , and bare TiO 2 . NiO/Ag/TiO 2 nanocomposite was also investigated for the most common pharmaceutical waste degradation and exhibited excellent degradation efficiency. The enhancement of the composite's performance could be attributed to the surface plasmonic resonance of the Ag nanoparticles, the formation of Schottky junctions at the Ag−TiO 2 and Ag−NiO interface, and the p−n heterojunction between NiO and TiO 2 . Ag NPs act as a photosynthesizer and a photocatalyst, facilitate electron transfer, shift the absorption to the visible light region, reduce the band gap of TiO 2 , suppress the electron−hole recombination, and enhance the photocatalytic activity and stability as a result.

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Section: Resultsmentioning

confidence: 98%

Section: Catalyst Characterizationmentioning

confidence: 97%

Visible Light Photocatalytic Degradation of Methylene Blue Dye and Pharmaceutical Wastes over Ternary NiO/Ag/TiO₂ Heterojunction

Mohammed,

Matalkeh,

Al Soubaihi

et al. 2023

ACS Omega

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“…To eliminate organic residues, the powder was washed numerous times with ethanol. The NiO@CDs were then dispersed in toluene and used for spin coating over deposition ofmethyl ammonium lead Iodide (MAPbI) (24).…”

Section: Precipitation Methodsmentioning

confidence: 99%

Brief Overview on Synthesis and Application of Ni–Doped Carbon Dots

Khajuria¹,

Sudan²,

Kapoor³

2022

ECS Trans.

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Carbon dots (CDs) are semiconductor materials with sizes ranging from 2 to 10 nm. Among these CDs, nickel CDs (Ni@CDs) materials have piqued researchers' curiosity in the past years due to their specific properties, such as strong catalytic activity, good stability, great hydrophilicity, and high oxidation states. Several synthetic pathways exist for the synthesis of Ni@CDs, such as hydrothermal method, microwave irradiation, green synthesis, pyrolytic decomposition, precipitation method, and electrochemical route. These Ni@CDs have shown application in charge transfer, excellent thermodynamic stability, luminescent properties, high chemical and photo-stability, opto-electronic devices, catalysis, sensing, and drug delivery. In this review, various synthetic methods had been explored extensively along with their numerous applications.

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“…66 Metal oxide NCs of NiO have shown potential for hole transport on top of the light harvesting layer in PSCs and Si solar cells. 67–69 Besides NiO, some other metal oxide NCs such as MoO 2 , 70 Co 3 O 4 , 71 Cu 2 O, 72 CuCrO 2 , 73 CuGaO 2 , 74 and CsPbI 3 (ref. 75) have been used as efficient top HTL for PSCs due to their excellent properties.…”

Section: Nanocrystals As Charge Transport Layersmentioning

confidence: 99%

“…11,14,15,17–22 Additionally, perovskite NCs are also good alternatives for light harvesting in solar cells. 12–14,16,23–28 Besides active layers (light harvesting layers), functional layers based on NCs, mainly including hole transport layers (HTLs), 29–99 electron transport layers (ETLs) 100–173 and interfacial functional layers (IFLs), 174–221 are of great importance in solar cells. Notably, NC additives also boost the performance of solar cells through defect passivation, plasmonic effect, solar concentration, light up-conversion and down-conversion/shifting, light scattering and reflection, and heat sinks.…”

Section: Introductionmentioning

confidence: 99%

Nanocrystals as performance-boosting materials for solar cells

Yang,

Cang,

et al. 2024

Nanoscale Adv.

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Nickel Oxide Monodispersed Quantum Dots as Hole Transport Layer in n–i–p Hybrid Perovskite Solar Cells

Cited by 6 publications

References 0 publications

Visible Light Photocatalytic Degradation of Methylene Blue Dye and Pharmaceutical Wastes over Ternary NiO/Ag/TiO₂ Heterojunction

Visible Light Photocatalytic Degradation of Methylene Blue Dye and Pharmaceutical Wastes over Ternary NiO/Ag/TiO₂ Heterojunction

Brief Overview on Synthesis and Application of Ni–Doped Carbon Dots

Nanocrystals as performance-boosting materials for solar cells

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Nickel Oxide Monodispersed Quantum Dots as Hole Transport Layer in n–i–p Hybrid Perovskite Solar Cells

Cited by 6 publications

References 0 publications

Visible Light Photocatalytic Degradation of Methylene Blue Dye and Pharmaceutical Wastes over Ternary NiO/Ag/TiO2 Heterojunction

Visible Light Photocatalytic Degradation of Methylene Blue Dye and Pharmaceutical Wastes over Ternary NiO/Ag/TiO2 Heterojunction

Brief Overview on Synthesis and Application of Ni–Doped Carbon Dots

Nanocrystals as performance-boosting materials for solar cells

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Product

Resources

About

Visible Light Photocatalytic Degradation of Methylene Blue Dye and Pharmaceutical Wastes over Ternary NiO/Ag/TiO₂ Heterojunction

Visible Light Photocatalytic Degradation of Methylene Blue Dye and Pharmaceutical Wastes over Ternary NiO/Ag/TiO₂ Heterojunction