Towards rare-earth-free white light-emitting diode devices based on the combination of dicyanomethylene and pyranine as organic dyes supported on zinc single-layered hydroxide - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Beilstein Journal of Nanotechnology Année : 2019

Towards rare-earth-free white light-emitting diode devices based on the combination of dicyanomethylene and pyranine as organic dyes supported on zinc single-layered hydroxide

Rachid Mahiou

Résumé

A new luminescent composite film resulting from the dispersion of luminescent organic dyes in a single-layered hydroxide (SLH)type inorganic matrix has been developed. Two fluorescent organic dyes emitting visible light upon blue LED excitation were investigated in this study: dicyanomethylene (DCM) and pyranine (HPTS). These dyes exhibit broad emission bands that cover a large part of the visible spectrum. The concept developed in our work consisted in keeping SLH in its wet form to ensure a good dispersion of the fluorescent dyes prior to immobilizing the hybrid materials in a silicone polymer to achieve luminescent composite films. We demonstrate that these coatings stacked upon each other and placed above a blue LED lead to white-light emission with suitable photometric parameters for applications in lighting or display devices: colour temperature of 5409 K and colour rendering index (CRI) of 81.
Fichier principal
Vignette du fichier
Jeff-Beilstein.pdf (2.95 Mo) Télécharger le fichier
Origine Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-03039769 , version 1 (04-12-2020)

Identifiants

Citer

Rachid Mahiou. Towards rare-earth-free white light-emitting diode devices based on the combination of dicyanomethylene and pyranine as organic dyes supported on zinc single-layered hydroxide. Beilstein Journal of Nanotechnology, 2019, 10, pp.760-770. ⟨10.3762/bjnano.10.75⟩. ⟨hal-03039769⟩
52 Consultations
42 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More