Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Influence of Phosphor Layer Composition on Flexible Electroluminescent Device Performance

Dina Esteves
* ,
Esra Akgül
ORCID logo ,
Usha Kiran Sanivada
,
Ines P Moreira
* ORCID logo ,
João Bessa
ORCID logo ,
Carla A. Silva
,
Fernando Cunha
ORCID logo ,
Raúl Fangueiro
Version 1 : Received: 5 December 2023 / Approved: 6 December 2023 / Online: 6 December 2023 (12:48:10 CET)

How to cite: Esteves, D.; Akgül, E.; Sanivada, U.K.; Moreira, I.P.; Bessa, J.; Silva, C.A.; Cunha, F.; Fangueiro, R. Influence of Phosphor Layer Composition on Flexible Electroluminescent Device Performance. Preprints 2023, 2023120375. https://doi.org/10.20944/preprints202312.0375.v1 Esteves, D.; Akgül, E.; Sanivada, U.K.; Moreira, I.P.; Bessa, J.; Silva, C.A.; Cunha, F.; Fangueiro, R. Influence of Phosphor Layer Composition on Flexible Electroluminescent Device Performance. Preprints 2023, 2023120375. https://doi.org/10.20944/preprints202312.0375.v1

Abstract

Electroluminescence (EL) is an innovative technology in the lighting area. The EL device's main structure consists of a phosphor layer sandwiched by two electrodes. In this work, several alternating current EL devices have been developed by applying a set of sequential layers with combinations of in-house prepared inks and commercially available ink as a phosphor layer. A flexible polyester textile substrate was functionalized with inks by spray coating technique, after knife-coated an interfacial layer directly on the surface. A thorough study was carried out on the phosphor layer composition to optimize the EL device performance, more precisely the illuminance intensity and the illuminance homogeneity. The developed phosphor layer was composed of zinc sulphide doped with copper (between 30.0 to 38.1 wt%) and diluted by using a diluent at different ratios (28.0 to 35.5 wt%). The best peak illuminance intensity of 61 lux was obtained when the phosphor ink presented 35.4% ZnS:Cu and was diluted with 33.0% diluent. The aim of this study to determine the best formulation of the phosphor layer, which can be highly promising for further developments of EL devices, taking in account different applications in market.

Keywords

electroluminescent textile; light-emitting textile; spray coating; phosphor layer

Subject

Chemistry and Materials Science, Surfaces, Coatings and Films

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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