Effect of microwave sintering on the crystal domain and electrical properties of TiO2 nanoparticles

Najeeb, Mansoor Ani; Alkareem, Asma; Awais, Muhammad; Ahmad, Zubair; Shakoor, Abdul; Alashraf, Abdulla; Mohamed, A.M.A.; Bhadra, Jolly; Al‐Thani, Noora; Touati, Farid; Rafique, Shazia

doi:10.1007/s11051-017-3896-5

Cited by 8 publications

(5 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 1 shows the XRD and TEM of MAPbBr3 QDs. X-ray powder diffraction peaks match the reported XRD patterns of MAPbBr3 crystal, [14] indicating that a single-phase MAPbBr3 was formed and thus used in the subsequent optical measurements. TEM image (Figure 1) shows that the MAPbBr3 particles are spherical with median size of 5.5 nm.…”

Section: Resultssupporting

confidence: 66%

Organo Metal Halide Perovskites Effective Ly Photosensitize the Production of Singlet Oxygen (1Δg)

Zhang¹,

Xu²

2019

Preprint

View full text Add to dashboard Cite

Metal halide perovskite (MHP) materials are under extensive examination for various high performance optoelectronic applications, but their photosensitizing utilization for singlet oxygen generation has not been explored. Based on the observed characteristic NIR phosphorescence of singlet oxygen and the photosensitized decomposition of a specific singlet oxygen chemical trapper (diphenylisobenzofuran), we show herby that MAPbBr3 quantum dots can significantly generate singlet oxygen with the quantum yield up to 0.34, which is the highest among nano semiconductor and nano metal material types of singlet oxygen photosensitizers. Further more, MAPbBr3 quantum dots show good stability towards singlet oxygen. The mechanism of MHP as a singlet oxygen photosensitizer is also suggested to be due to triplet excitons. This finding expands new applications of MHPs in PDT, antiviral and antibacterial treatments, and pharmaceutical industry.

show abstract

Section: Resultssupporting

confidence: 66%

Organo Metal Halide Perovskites Effective Ly Photosensitize the Production of Singlet Oxygen (1Δg)

Zhang¹,

Xu²

2019

Preprint

View full text Add to dashboard Cite

show abstract

“… 34 Generally speaking, the smaller the arc in the EIS Nyquist diagram, the smaller the charge-transfer resistance on the electrode surface, and the higher the separation efficiency of photogenerated carriers. 35 Fig. 7 shows the electrochemical impedance spectrum of the composite materials and monomers.…”

Section: Resultsmentioning

confidence: 99%

Study on the performance of a MOF-808-based photocatalyst prepared by a microwave-assisted method for the degradation of antibiotics

Wang

Xue

et al. 2021

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…The change in the 2 θ value towards the lower value in the aged sample suggests the expansion of unit cells. The grain size ( L ) of the fresh and aged samples has been calculated using the following expression 29 : where, β represents the line broadening at FWHM, K is a shape-factor (dimensionless). The value of shape factor is supposed to be 0.9 (close to unity), θ is the Bragg angle (in degrees), λ is the X-ray wavelength, and L is the mean size of the crystalline domains.…”

Section: Resultsmentioning

confidence: 99%

Instability in CH3NH3PbI3 perovskite solar cells due to elemental migration and chemical composition changes

Ahmad

Najeeb

Shakoor

et al. 2017

Sci Rep

Self Cite

107

View full text Add to dashboard Cite

Organic-inorganic halide perovskites have rapidly grown as favorable materials for photovoltaic applications, but accomplishing long-term stability is still a major research problem. This work demonstrates a new insight on instability and degradation factors in CH3NH3PbI3 perovskite solar cells aging with time in open air. X-ray photoelectron spectroscopy (XPS) has been used to investigate the compositional changes caused by device degradation over the period of 1000 hrs. XPS spectra confirm the migration of metallic ions from the bottom electrode (ITO) as a key factor causing the chemical composition change in the perovskite layer besides the diffusion of oxygen. XPS results are in good agreement with the crystallographic marks. Glow discharge optical emission spectrometry (GD-OES) has also been performed on the samples to correlate the XPS results. Based on the experimental results, fundamental features that account for the instability in the perovskite solar cell is discussed.

show abstract

Effect of microwave sintering on the crystal domain and electrical properties of TiO2 nanoparticles

Cited by 8 publications

References 32 publications

Organo Metal Halide Perovskites Effective Ly Photosensitize the Production of Singlet Oxygen (1Δg)

Organo Metal Halide Perovskites Effective Ly Photosensitize the Production of Singlet Oxygen (1Δg)

Study on the performance of a MOF-808-based photocatalyst prepared by a microwave-assisted method for the degradation of antibiotics

Instability in CH3NH3PbI3 perovskite solar cells due to elemental migration and chemical composition changes

Contact Info

Product

Resources

About