Microwave-assisted synthesis of colloidal ZnO nanocrystals and their utilization in improving polymer light emitting diodes efficiency

Škoda, David; Urbánek, Pavel; Ševčík, Jakub; Münster, Lukáš; Antoš, Jan; Kuřitka, Ivo

doi:10.1016/j.mseb.2018.10.013

Cited by 26 publications

(10 citation statements)

References 87 publications

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“…For the purposes of this review, we assume that the “solvothermal synthesis” is a process occurring in an inorganic solvent environment (where m s > 50%), with the pressure equal to or higher than atmospheric pressure. The results of the literature review concerning microwave solvothermal synthesis of ZnO are divided into the following subgroups: Microwave solvothermal synthesis of ZnO nanostructures without any additional heat treatment, where the literature review results [ 402 , 573 , 758 , 759 , 760 , 761 , 762 , 763 , 764 , 765 , 766 , 767 , 768 , 769 , 770 , 771 , 772 , 773 , 774 , 775 , 776 , 777 , 778 , 779 , 780 , 781 , 782 , 783 , 784 , 785 , 786 , 787 , 788 , 789 , 790 , 791 , 792 , 793 , 794 , 795 , 796 , 797 ...…”

Section: Microwave Solvothermal Synthesis Of Znomentioning

confidence: 99%

A Review of Microwave Synthesis of Zinc Oxide Nanomaterials: Reactants, Process Parameters and Morphologies

2020

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Zinc oxide (ZnO) is a multifunctional material due to its exceptional physicochemical properties and broad usefulness. The special properties resulting from the reduction of the material size from the macro scale to the nano scale has made the application of ZnO nanomaterials (ZnO NMs) more popular in numerous consumer products. In recent years, particular attention has been drawn to the development of various methods of ZnO NMs synthesis, which above all meet the requirements of the green chemistry approach. The application of the microwave heating technology when obtaining ZnO NMs enables the development of new methods of syntheses, which are characterised by, among others, the possibility to control the properties, repeatability, reproducibility, short synthesis duration, low price, purity, and fulfilment of the eco-friendly approach criterion. The dynamic development of materials engineering is the reason why it is necessary to obtain ZnO NMs with strictly defined properties. The present review aims to discuss the state of the art regarding the microwave synthesis of undoped and doped ZnO NMs. The first part of the review presents the properties of ZnO and new applications of ZnO NMs. Subsequently, the properties of microwave heating are discussed and compared with conventional heating and areas of application are presented. The final part of the paper presents reactants, parameters of processes, and the morphology of products, with a division of the microwave synthesis of ZnO NMs into three primary groups, namely hydrothermal, solvothermal, and hybrid methods.

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Section: Microwave Solvothermal Synthesis Of Znomentioning

confidence: 99%

A Review of Microwave Synthesis of Zinc Oxide Nanomaterials: Reactants, Process Parameters and Morphologies

2020

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“…Nonetheless, the importance of its use as emissive layer (EML) for white light generation was recognized and LEDs were built having ZnO films deposited by low‐pressure thermal evaporation . Recently, polymer/inorganic hybrid LED having ZnO nanoparticles and nanorods, Fe 3 O 4 and TiO 2 , for example, were obtained, because of their enhanced optical and electrical properties in comparison to pure polymer system …”

Section: Figurementioning

confidence: 99%

White Electroluminescence from Aluminum Zinc Oxide Embedded in Poly(9‐vinylcarbazole)

et al. 2019

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Simple methods for manufacturing white light‐emitting diodes (WLEDs) based on ZnO are still challenging researchers. Solution processed WLEDs based on Al doped ZnO (AZO) nanoparticles embedded in PVK (hybrid system) are demonstrated here, and PL studies of the hybrid system suggest that defects in AZO and PVK/AZO interface are likely to be the origin of white EL. Besides electrical conductivity increment, AZO provided the emissive layer with a more balanced charge injection; thus, the threshold voltage reduced from 8.1 V to 7.5 V and EL enhanced from 4.47 cd/m2 to 18.69 cd/m2 at 10 V, for the pure PVK compared to the hybrid system, respectively.

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“…An approach to improve the lifetime of OLEDs is the utilization of nanocomposite active layers based on polymer matrices and semiconductive nanoparticle fillers. The charge carrier ratio is well balanced in such composites, which results in improved external quantum efficiency [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

The Photostability of Novel Boron Hydride Blue Emitters in Solution and Polystyrene Matrix

et al. 2021

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In recent work, the boron hydride anti-B18H22 was announced in the literature as a new laser dye, and, along with several of its derivatives, its solutions are capable of delivering blue luminescence with quantum yields of unity. However, as a dopant in solid polymer films, its luminescent efficiencies reduce dramatically. Clarification of underlying detrimental effects is crucial for any application and, thus, this contribution makes the initial steps in the use of these inorganic compounds in electrooptical devices based on organic polymer thin films. The photoluminescence behavior of the highly luminescent boron hydrides, anti-B18H22 and 3,3′,4,4′-Et4-anti-B18H18, were therefore investigated. The quantum yields of luminescence and photostabilities of both compounds were studied in different solvents and as polymer-solvent blends. The photophysical properties of both boranes are evaluated and discussed in terms of their solvent-solute interactions using photoluminescence (PL) and NMR spectroscopies. The UV degradability of prepared thin films was studied by fluorimetric measurement. The effect of the surrounding atmosphere, dopant concentration and the molecular structure were assessed.

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Microwave-assisted synthesis of colloidal ZnO nanocrystals and their utilization in improving polymer light emitting diodes efficiency

Cited by 26 publications

References 87 publications

A Review of Microwave Synthesis of Zinc Oxide Nanomaterials: Reactants, Process Parameters and Morphologies

A Review of Microwave Synthesis of Zinc Oxide Nanomaterials: Reactants, Process Parameters and Morphologies

White Electroluminescence from Aluminum Zinc Oxide Embedded in Poly(9‐vinylcarbazole)

The Photostability of Novel Boron Hydride Blue Emitters in Solution and Polystyrene Matrix

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