Year: 2023
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide The multifunctional materials for application in organic light-emitting devices (OLEDs) based on a single structural motif are very desired but quite rare species. Such structures allow simplifying the chemical variety within OLED heterostructures and thus reducing their cost, manufacturing time, and logistic efforts. In this paper, we report the 9-(2,3,5,6-tetrafluoro-4-vinylphenyl)carbazole molecule (Cz4FS) utilized as a fluorescent emitter, host material for quantum dot based OLEDs (QLEDs), acceptor part of the exciplex active layer, and monomer that can be used for the preparation of emissive polymers and copolymers. The external quantum efficiency (EQE) of the corresponding fluorescent OLED based on a Cz4FS single emitter doped into a 1,3-bis(carbazol-9-yl)benzene matrix is 4.2%, which is close to the theoretical limit and maximum brightness at the level of 3600 cd/m 2 . An OLED based on exciplex emission obtained utilizing Cz4FS as an acceptor demonstrates higher efficiency (5.3%) and much higher brightness near 25 000 cd/m 2 . A QLED based on Cz4FS as a host for CdSeS/ZnS core–shell quantum dots demonstrates excellent energy transfer from the Cz4FS matrix that results in a clear spectrum of quantum dots with an EQE of 2.3%, maximum of 19 000 cd/m 2, and narrow spectral distribution. An OLED based on a Cz4FS-based polymer and copolymer demonstrates not extraordinary efficiency but low-efficiency roll-off in a wide range of current densities.
Source: ACS Applied Electronic Materials
Institutions: Lviv Polytechnic National University, Kaunas University of Technology, Institut polytechnique de Grenoble, Centre National de la Recherche Scientifique, Université Savoie Mont Blanc, Université Grenoble Alpes, Cherkasy National University, Linköping University, Belarusian State University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $5,000
Awards: G2846425760, Design and fabrication of efficient, stable and cheap blue organic light-emitting diodes as components of full-colour displays and solid state lighting, G4985041069, Donoras-akceptorius tipo organiniai puslaidininkiai, pasižymintys sugertimi artimoje infraraudonajai spektro srityje, efektyviems fotodetektoriams, NAISS, G888487417
OpenAlex ID: W4353042002