Temperature dependence on addition of urea and its related compounds on formation of neodymium condensed phosphates

Onoda, Hiroaki; Takenaka, Atsushi; Kojima, K.; Nariai, Hiroyuki

doi:10.1016/j.matdes.2004.08.020

Cited by 7 publications

(7 citation statements)

References 26 publications

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“…As proof, Fourier transform infrared spectroscopy (FTIR) is analyzed to specify the PA‐Sn complexation on SnO 2 surface, as shown in Figure 1b. As compared with pristine SnO 2 , two new vibration peaks appear in PA‐SnO 2 powders, and the absorption bands at 1125 cm −1 and 1046 cm −1 are well ascribed to the asymmetric stretching mode of the

{PO}_{2}^{-}

group [ 27 ] and the terminal phosphate groups (

{PO}_{3}^{2 -}

), [ 28 ] respectively. Moreover, the peaks at 952 cm −1 and 642 cm −1 observed of pristine SnO 2 sample are related to OSnO stretching and SnO vibration.…”

Section: Resultsmentioning

confidence: 99%

Highly Enhanced Efficiency of Planar Perovskite Solar Cells by an Electron Transport Layer Using Phytic Acid–Complexed SnO₂ Colloids

Liu

Xie

et al. 2021

Solar RRL

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SnO2 aqueous colloids as electron transport layers (ETLs) have been widely employed in planar perovskite solar cells (PSCs). However, the surface defects and energy level mismatch at the SnO2 ETL/perovskite interface are still great challenges for the power conversion efficiency (PCE) improvement. Herein, a natural and nontoxic phytic acid (PA) compound is introduced into the SnO2 aqueous colloids to prepare the ETL to depress its defects, and systematically study the influence of different PA complexation on the photovoltaic performance of PSCs. The results demonstrate that PA complexation can assemble unique coordination complexes between PA and SnO2 nanocrystals (NCs) in a new bonding of SnOP, which can passivate SnO2 inherent surface defects and tune the electronic properties of SnO2 ETLs. PA complexation can significantly disaggregate the SnO2 oligomers and reduce the cluster size distribution from 98.37 to 15.87 nm. Meanwhile, the reduction of surface trap states inhibits the potential barriers, thus the electrical conductivity is about two times as high as compared with the pristine SnO2 ETLs. Consequently, a high PCE of 21.43% in PA‐SnO2‐based PSCs is obtained, which presents an improvement of 10.9% over that of the pristine SnO2‐based PSCs.

show abstract

{PO}_{2}^{-}

group [ 27 ] and the terminal phosphate groups (

{PO}_{3}^{2 -}

), [ 28 ] respectively. Moreover, the peaks at 952 cm −1 and 642 cm −1 observed of pristine SnO 2 sample are related to OSnO stretching and SnO vibration.…”

Section: Resultsmentioning

confidence: 99%

Highly Enhanced Efficiency of Planar Perovskite Solar Cells by an Electron Transport Layer Using Phytic Acid–Complexed SnO₂ Colloids

Liu

Xie

et al. 2021

Solar RRL

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“…Some of the CN polymers can be acted as the visible-light sensitizers, and they have already successfully applied in some other works. 21,37,[40][41][42] 3.4. Morphology of the Photocatalysts.…”

Section: Resultsmentioning

confidence: 99%

Carbon Nitride Polymers Sensitized with N-Doped Tantalic Acid for Visible Light-Induced Photocatalytic Hydrogen Evolution

Yue

Iwaï

et al. 2010

J. Phys. Chem. C

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Carbon nitride (CN) polymers sensitized with N-doped tantalic acid were prepared by pyrogenation of the mixture of urea and tantalic acid at 400°C. X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectrometry (EDS), and Fourier transform infrared spectroscopy (FTIR) results indicated that the CN polymers were successfully modified on the surface of the N-doped tantalic acid. UV-vis diffusion reflectance spectra (DRS) showed that the absorption edge of the CN polymers sensitized with N-doped tantalic acid red-shifted remarkably to the visible light region compared with bare tantalic acid. This new kind of CN polymers sensitized with N-doped tantalic acid showed a high photocatalytic activity and good stability for hydrogen evolution from an aqueous methanol solution under visible light (λ g 410 nm) irradiation, and up to 4.8% of the apparent quantum yield was achieved at 420 nm. The protonic acidity of the tantalic acid makes themselves interact more intenser with the CN polymers, and easily hydrate in the aqueous solutions, so the separation probabilities of the photogenerated charge carriers would be improved.

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“…[ 26 ] The peak around 1050 cm −1 is determined to be POP, [ 27 ] which can be ascribed to the presence of the phosphate group, acting as the glue links two SnO 2 crystal grains and therefore increases the carrier transporting. [ 28 ]…”

Section: Resultsmentioning

confidence: 99%

“…[26] The peak around 1050 cm −1 is determined to be POP, [27] which can be ascribed to the presence of the phosphate group, acting as the glue links two SnO 2 crystal grains and therefore increases the carrier transporting. [28] In order to investigate the electronic properties of different SnO 2 ETLs, we did the conductivity measurement and calculated the energy level alignment of functional layers. As shown in Figure 1g, devices with the structure of Au/ETL/Au were fabricated to detect the conductivity of different SnO 2 layers.…”

Section: Optoelectronic Properties Of Phosphate-modified Sno 2 Layersmentioning

confidence: 99%

Managing Lead Leakage in Efficient Perovskite Solar Cells with Phosphate Interlayers

Chen

et al. 2022

Adv Materials Inter

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Lead leakage from perovskite solar cells (PSCs) leads to device failure and environment contamination. Here, these issues are solved with a sodium phosphate (Na3PO4)‐modified tin(IV) dioxide (SnO2) layer that simultaneously boosts the device performance and captures most of dissolved lead in water. Phosphate incorporation improves charge transfers and passivates the buried perovskite interface, leading to highly improved device efficiency up to 23% with negligible hysteresis. More importantly, the phosphatized SnO2 layer shows high lead‐adsorption capacity with a sequestration efficiency of 79.6% due to the numerous anchor sites of oxygen lone pairs, converting dissolved lead into insoluble compounds in water. This study presents a facile protocol of efficient and sustainable perovskite photovoltaics upon future commercialization.

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Temperature dependence on addition of urea and its related compounds on formation of neodymium condensed phosphates

Cited by 7 publications

References 26 publications

Highly Enhanced Efficiency of Planar Perovskite Solar Cells by an Electron Transport Layer Using Phytic Acid–Complexed SnO₂ Colloids

Highly Enhanced Efficiency of Planar Perovskite Solar Cells by an Electron Transport Layer Using Phytic Acid–Complexed SnO₂ Colloids

Carbon Nitride Polymers Sensitized with N-Doped Tantalic Acid for Visible Light-Induced Photocatalytic Hydrogen Evolution

Managing Lead Leakage in Efficient Perovskite Solar Cells with Phosphate Interlayers

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Temperature dependence on addition of urea and its related compounds on formation of neodymium condensed phosphates

Cited by 7 publications

References 26 publications

Highly Enhanced Efficiency of Planar Perovskite Solar Cells by an Electron Transport Layer Using Phytic Acid–Complexed SnO2 Colloids

Highly Enhanced Efficiency of Planar Perovskite Solar Cells by an Electron Transport Layer Using Phytic Acid–Complexed SnO2 Colloids

Carbon Nitride Polymers Sensitized with N-Doped Tantalic Acid for Visible Light-Induced Photocatalytic Hydrogen Evolution

Managing Lead Leakage in Efficient Perovskite Solar Cells with Phosphate Interlayers

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Resources

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Highly Enhanced Efficiency of Planar Perovskite Solar Cells by an Electron Transport Layer Using Phytic Acid–Complexed SnO₂ Colloids

Highly Enhanced Efficiency of Planar Perovskite Solar Cells by an Electron Transport Layer Using Phytic Acid–Complexed SnO₂ Colloids