BaZrO3 perovskite nanoparticles as emissive material for organic/inorganic hybrid light-emitting diodes. (October 2017)

• Record Type: Journal Article
• Authors: Ivaniuk, K.; Cherpak, V.; Stakhira, P.; Baryshnikov, G.; Minaev, B.; Hotra, Z.; Turyk, P.; Zhydachevskii, Ya.; Volyniuk, D.; Aksimentyeva, O.; Penyukh, B.; Lazauskas, A.; Tamulevičius, S.; Grazulevicius, J.V.; Ågren, H.
• Is Part Of: Dyes and pigments. Volume 145(2017)
• Page Start: 399
• Page End: 403
• Publication Date: 2017-10
• Subjects: Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2017.06.020
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: In the present work we have demonstrated double-channel emission from organic exciplexes coupled to inorganic nanoparticles. The process is demonstrated by yellow-green emission in light-emitting diodes based on organic exciplexes hybridized with perovskite-type dispersed BaZrO3 nanoparticles. Such double-channel emission provides a broadening of the electroluminescence spectrum and a resultant yellow-green emission color of the device. We have realized an energy transfer from the exciplexes arranged by the interface between two organic layers and the spherical-shaped BaZrO3 nanoparticles randomly deposited on the organic interface constructed of the tris(4-carbazoyl-9-ylphenyl)amine and 4, 7-diphenyl-1, 10-phenanthroline molecules. The fabricated device exhibits a current efficiency value of 3.88 C d/A, maximum brightness of 3465 cd/m 2 (at 15 V), and external quantum efficiency of about 1.26%. In order to estimate the efficiency of the energy transfer from the exciplex to the BaZrO3 nanoparticles we have applied the Förster model for the dipole-dipole energy transfer accounting for the mutual overlap of the exciplex emission spectrum and the absorption spectrum of the BaZrO3 nanoparticles. Graphical abstract: Highlights: Yellow-green organic-inorganic light-emitting diodes have been fabricated. BaZrO3 nanoparticles have been used as the emissive materials. We have observed the energy transfer between organic exciplex and BaZrO3 nanoparticles. We have applied the Förster model for such energy transfer.