Synergistic effect of graphene and ZnO nanorods in enhancing the performance of MEH-PPV based polymer light emitting diode

Gautam, Khyati; Singh, Inderpreet; Bhatnagar, Rangoli; Bhatnagar, P. K.; Peta, Koteswara Rao

doi:10.1016/j.displa.2022.102170

Cited by 6 publications

(8 citation statements)

References 26 publications

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“…al improved the performance of MEH-PPV based PLEDs using graphene nanoflakes as conductive nanofillers and ZnO nanorods as a singlemode waveguide for efficient light extraction. [12] Al-Bati et. al examined the effect of TiO 2 content on the energy transfer mechanism in a ternary blend consisting of poly(9,9-dioctylfluorene-2,7-diyl) (PFO), MEH-PPV and poly 9,9-dioctylfluorenealt-benzothiadiazole (F8BT).…”

Section: Introductionmentioning

confidence: 99%

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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: Introductionmentioning

confidence: 99%

“…Recently, Gautam et. al improved the performance of MEH‐PPV based PLEDs using graphene nanoflakes as conductive nanofillers and ZnO nanorods as a single‐mode waveguide for efficient light extraction [12] . Al‐Bati et.…”

Section: Introductionmentioning

confidence: 99%

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

Kumar

Periyasamy

2022

ChemistrySelect

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“…Doping conjugated polymers with inorganic nanoparticles is an effective approach to modify and enhance their properties 3–6 . Zinc oxide nanostructures, especially when combined with carbon nanotubes, have shown promise for doping conjugated polymers due to their suitable energy levels, high surface area, and good optoelectronic properties 7 …”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5][6] Zinc oxide nanostructures, especially when combined with carbon nanotubes, have shown promise for doping conjugated polymers due to their suitable energy levels, high surface area, and good optoelectronic properties. 7 The optical properties of conjugated polymers are closely related to their structure, morphology, and energetic states. 8 Upon doping with nanostructures, changes in the optoelectronic properties of the polymer can occur, which have implications for its performance in optoelectronic devices.…”

mentioning

confidence: 99%

“…8 Upon doping with nanostructures, changes in the optoelectronic properties of the polymer can occur, which have implications for its performance in optoelectronic devices. [5][6][7]9,10 Velasco Davoise et al 10 revealed that doping poly(3-hexylthiophene) with graphene led to improve its electrical mobility and optical properties. Hilal and Han 11 demonstrated an increase in the conductivity and power-conversion efficiency of organic solar cells by using PEDOT-PSS/graphene composite as a hole transport layer.…”

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Studying the optoelectronic properties and emission quenching dynamics of poly‐TPD by incorporating ZnO nanoparticles and multiwalled carbon nanotubes

Al‐Asbahi

2023

J of Applied Polymer Sci

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In this study, the optoelectronic properties and emission dynamic quenching of poly‐TPD were investigated upon incorporating ZnO nanoparticles and multiwalled carbon nanotubes (MWCNTs). A solution blending method was utilized to successfully prepare poly‐TPD incorporated with various contents of ZnO/MWCNT nanocomposites. The optoelectronic properties of the nanocomposites were analyzed using UV–Vis and photoluminescence spectrophotometry. The incorporation of the nanocomposites resulted in a decrease in transmittance, reflectance, and absorption edge, indicating a reduction in the poly‐TPD's bandgap. Parameters such as extinction coefficient, Urbach energy, and charge carrier density also decreased with addition of the nanocomposites, suggesting increased scattering, disorder, and the presence of defect states. The decrease in bandgap from 2.970 to 2.852 eV with increasing the nanocomposite content confirmed the emergence of new electronic states. Furthermore, the nature of the transitions changed from direct allowed for pure poly‐TPD to direct forbidden upon incorporation of the nanocomposites. The inclusion of the nanocomposites also led to a decrease in refractive index and fluorescence intensity. The observed fluorescence quenching primarily exhibited dynamic characteristics, with a Stern–Volmer constant of 5.14 L/g and quenching rate constants surpassing the minimum threshold for efficient quenching. The increase in charge transfer rate constants with the nanocomposite content indicated enhanced quenching efficiency and charge transfer, likely due to the increased surface area and presence of defects. These findings suggest that poly‐TPD incorporated with ZnO/MWCNT nanocomposites displays promising properties for applications in optoelectronic devices.

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Metal oxide-based LEDs and lasers

Kaur,

Siwal

2024

Metal Oxides for Next-Generation Optoelectronic, Photonic, and Photovoltaic Applications

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Synergistic effect of graphene and ZnO nanorods in enhancing the performance of MEH-PPV based polymer light emitting diode

Cited by 6 publications

References 26 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**

Studying the optoelectronic properties and emission quenching dynamics of poly‐TPD by incorporating ZnO nanoparticles and multiwalled carbon nanotubes

Metal oxide-based LEDs and lasers

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