Abstract
This study examined glass-based organic electroluminescence in the presence of a cyclodextrin polymer as an interlayer. Glass-based organic electroluminescence was achieved by the deposition of five layers of N,N’-Bis(3-methylphenyl)N,N’-bis(phenyl)-benzidine, cyclodextrin polymer (CDP), tris-(8-hydroxyquinolinato) aluminium LiF and Al on an indium tin oxide-coated glass substrate. The glass-based OEL exhibited green emission owing to the fluorescence of tris-(8-hydroxyquinolinato) aluminium. The highest luminance was 19,620 cd m−2. Moreover, the glass-based organic electroluminescence device showed green emission at 6 V in the curved state because of the inhibited aggregation of the cyclodextrin polymer. All organic molecules are insulating, but except CDP, they are standard molecules in conventional organic electroluminescence devices. In this device, the CDP layer contained pores that could allow conventional organic molecules to enter the pores and affect the organic electroluminescence interface. In particular, self-association was suppressed, efficiency was improved, and light emission was observed without the need for a high voltage. Overall, the glass-based organic electroluminescence device using CDP is an environmentally friendly device with a range of potential energy saving applications.
Highlights
Organic electroluminescence (OEL) is the feature of a light-emitting device that utilises fluorescence or phosphorescence emitted from an organic thin film
The luminance increases because in an OEL device containing α-cyclodextrin polymer (CDP) in the CDP layer, as the of 8 molecules are included in the holes one by one, the association between TPD and Alq36 is suppressed, and excitons are generated efficiently
The effects of differences in the CDP used in the OEL devices were examined
Summary
Organic electroluminescence (OEL) is the feature of a light-emitting device that utilises fluorescence or phosphorescence emitted from an organic thin film. In addition to the synthesis of new materials, research on the fabrication of OELs that exhibit high-efficiency light emission has focused on topics such as the control of quenching of excited states between the hole-transport and light-emitting layers, and the promotion of charge recombination. These compounds containing CD are used widely in the food and pharmaceutical industries because they are stable and do not oxidise or evaporate In this respect, considering the molecular stability of CD, a polymer of CD (CDP) has been used, such as in the development of the interlayer composite photocatalyst and the operation of the aqueous solutions inclusion complex as a new polymer material, respectively [22,23]. The overall aim was to manufacture environmentally friendly OEL devices using plant-derived materials, such as CDP
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