Comparison of polymeric stabilization of organic/inorganic (MEH-PPV/TiO2) hybrid composites synthesized via different routes

Mittal, Tanu; Tiwari, Sangeeta; Mehta, Aarti; Sharma, Shailesh Narain

doi:10.1007/s00396-017-4094-9

Cited by 10 publications

(6 citation statements)

References 29 publications

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“…The porosity associated problem leads to the development of stress/strain in the film which eventually results in defective sites aiding nonradiative recombination. [36] This is also confirmed through an increased non-radiative rate for MEH-PPV compared to HyNCs in Table 2. Thus, the higher contact angle (99°) for 5 % Zr PPV HyNCs signifies lower stress, lesser defects and increased hydrophobicity making it more suitable for PLEDs in comparison with MEH-PPV/ZnO HyNC.…”

Section: Photostability Analysissupporting

confidence: 53%

“…The higher contact angle of HyNCs (CA>90°) signifies the compact structured dense film with rigid morphology and lesser porosity whereas, the lower contact angle of MEH‐PPV (CA∼88°) films represents the hydrophilic nature and pores structures due to the presence of voids and polymeric defects. The porosity associated problem leads to the development of stress/strain in the film which eventually results in defective sites aiding non‐radiative recombination [36] . This is also confirmed through an increased non‐radiative rate for MEH‐PPV compared to HyNCs in Table 2.…”

Section: Resultsmentioning

confidence: 71%

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Exciton Dynamics of MEH‐PPV polymer based Nanocomposites: Effect of Molecular Orbital Energy Levels of Nanoparticles**

Kumar

Periyasamy

2022

ChemistrySelect

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Exploring and investigating the strategies to improve quantum efficiency and photostability of light‐emitting polymers in polymer light‐emitting diodes is significantly an important topic of research. Thus this study endeavours towards the determination of the role of molecular orbital energy levels of metal oxide nanoparticles on the performance characteristics of hybrid nanocomposites. This work attempts to vary the proportions of zirconium dioxide (ZrO2) nanoparticles in nanocomposites of poly[2‐methoxy‐5‐(2’‐ethylhexyloxy)‐1,4‐phenylenevinylene] (MEH‐PPV), which leads to a six‐fold enhancement of luminescence quantum efficiency and increased radiative recombination rate due to an appropriate energy level alignment. An improvement in photostability was also reported due to a reduction in polymer chain defects, inhibition of moisture intervention and most importantly, impediment of the photo‐oxidation by controlling the triplet exciton dynamics. Thus, efforts are made to validate the role of energy levels of ZrO2 nanoparticles in improving the luminescence quantum efficiency and photostability of MEH‐PPV compared to ZnO incorporated MEH‐PPV.

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Section: Photostability Analysissupporting

confidence: 53%

Section: Resultsmentioning

confidence: 71%

Exciton Dynamics of MEH‐PPV polymer based Nanocomposites: Effect of Molecular Orbital Energy Levels of Nanoparticles**

Kumar

Periyasamy

2022

ChemistrySelect

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“…However, few of the group members have also synthesized MEH‐PPV/TiO 2 nanocomposites in aqueous and ethanol medium, respectively. They investigated their zeta potential and Stern‐Volmer quenching constants based on pH media and concluded that MEH‐PPV/TiO 2 (aqueous) nanocomposites can be used as potential active layer in hybrid photovoltaic and photoelectrochemical devices …”

Section: Other Phosphors For Spectral Conversion In Dsscsmentioning

confidence: 99%

A review on spectral converting nanomaterials as a photoanode layer in dye‐sensitized solar cells with implementation in energy storage devices

et al. 2020

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The present review article aims at the application of rare-earth-based titanium dioxide nanocrystals as spectral converters in photovoltaic devices, with special focus on dye-sensitized solar cells (DSSCs). Additionally, the implementation of DSSCs in energy storage, more importantly, DSSCs and lithium-ion batteries (LIB) integrated devices are systematically described. The absorption in DSSCs is mainly confined to the visible solar spectrum, which is one of the main reasons behind its limited power conversion efficiency. This has led to shifting of research focus on broadening the light absorption range of DSSCs, which can further lead to enhancement in overall power conversion efficiency. TiO 2 , doped with rare-earth (RE) ions, is often used as an electron transport layer (ETL) in DSSCs to overcome this absorption-related issue. This article gives a detailed review of TiO 2 doped with different RE ions, as an electron transport layer in DSSCs. More importantly, we have summarized all the recent important findings with the application of DSSCs in LIB and photocapacitors. K E Y W O R D S DSSCs, efficiency, electron transport layer, energy storage, photovoltaics, rare-earth 1 | OBJECTIVES • The main objective of this review article is to provide an overview of TiO 2 -based photoanode layer used in dye-sensitized solar cells (DSSCs).

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“…Thus, their attractive applications in polymer hybrid materials are more and more interesting to scientists in various fields. [1][2][3][4][5][6] Inorganic nanoparticles with interesting and useful properties are uniquely associated with polymeric materials. The design and synthesis of polymer hybrid materials have been focused on the combination of inorganic constituents such as carbon nanotubes, graphene, metal oxide nanoparticles (TiO 2 , ZnO and SiO 2 ) and polymers at the nanoscale.…”

Section: Introductionmentioning

confidence: 99%

“…Polymer–inorganic nanoparticle hybrid materials tend to show better chemical, physical and mechanical properties than their components. Thus, their attractive applications in polymer hybrid materials are more and more interesting to scientists in various fields 1–6 . Inorganic nanoparticles with interesting and useful properties are uniquely associated with polymeric materials.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of hybrid polystyrene–titanium dioxide with enhanced dye degradation and antimicrobial properties: investigation of the effect of triethylene glycol dimethacrylate on photocatalytic activity

Metanawin

2021

Polymer International

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The mini‐emulsion polymerization of polystyrene–titanium dioxide (PS/TiO2) hybrid antibacterial material was carried out. Triethylene glycol dimethacrylate (TEGDMA) was used, as a crosslinking agent, to enhance the stability, the encapsulation efficiency of TiO2, the self‐organized structure of the nanoparticles and photocatalytic behavior. The particle size and morphology as well as the photocatalytic properties of the polymer hybrids were characterized by dynamic light scattering, field emission SEM and UV–visible spectroscopy. The results showed that the average particle size of PS/TiO2 hybrids was in the range 98–242 nm with a narrow size distribution. The results of field emission SEM demonstrated the raspberry‐like self‐organized hexagonal structure of the polymer hybrids in the presence of TEGDMA. The morphology and structure of the PS/TiO2 hybrid were observed using high resolution TEM. The results show that the PS and PS/TiO2 hybrids have a well‐defined structure. Energy‐dispersive X‐ray spectroscopy was used to confirm that PS/TiO2 hybrid contains elemental titanium. It was noticed that the elemental analysis of Ti and O was 8.03 wt% (2.9 at%) and 7.97 wt% (6.5 at%), respectively. It should be emphasized that the results of high resolution TEM and energy‐dispersive X‐ray spectroscopy are considered excellent proof for the formation of PS/TiO2 hybrid. The thermal properties of PS and the hybrids with TiO2 were explored by DSC. It was found that the presence of TEGDMA in the system may reduce the glass transition temperature (Tg) of the polymer hybrids. XRD confirmed the formation of PS/TiO2 hybrids and the antibacterial activity was also investigated. An escalation of intensity in the XRD pattern of the TiO2 signals in the PS/TiO2 hybrids was observed. The antibacterial activity study noted that the PS/TiO2 hybrid demonstrated excellent antifungal and antibacterial properties against a broad range of both Gram‐positive (Staphylococcus aureus) and Gram‐negative (Klebsiella pneumoniae) bacteria. The photocatalytic efficiency of PS/TiO2 was assessed by monitoring the discoloration of an organic dye (methylene blue) under UVA irradiation. It indicated that the photocatalysis of PS/TiO2 in the presence of TEGDMA was increased due to the association of TEGDMA in the self‐organization structure of the hybrid system. © 2021 Society of Industrial Chemistry.

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Comparison of polymeric stabilization of organic/inorganic (MEH-PPV/TiO2) hybrid composites synthesized via different routes

Cited by 10 publications

References 29 publications

Exciton Dynamics of MEH‐PPV polymer based Nanocomposites: Effect of Molecular Orbital Energy Levels of Nanoparticles**

Exciton Dynamics of MEH‐PPV polymer based Nanocomposites: Effect of Molecular Orbital Energy Levels of Nanoparticles**

A review on spectral converting nanomaterials as a photoanode layer in dye‐sensitized solar cells with implementation in energy storage devices

Fabrication of hybrid polystyrene–titanium dioxide with enhanced dye degradation and antimicrobial properties: investigation of the effect of triethylene glycol dimethacrylate on photocatalytic activity

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