The Effect of Molecular Structure on the Properties of Fluorene Derivatives for OLED Applications
A new family of symmetrical fluorene derivatives with different types of substituents attached to the C-2 and C-7 positions of the fluorene core synthesized by the Sonogashira coupling reactions is reported. The electronic structures and the properties of the compounds investigated by means of photoelectron emission spectroscopy, UV-Vis absorption and photoluminescent spectroscopy as well as by DFT and TD-DFT theoretical calculations are discussed. It is shown that the nature of substituents influences the π-conjugation of the molecules. No intermolecular charge transfer within the investigated wavelength range is observed. The applicability of the synthesized compounds in organic light-emitting diodes (OLEDs) based on exciplex emission is demonstrated. The advanced co-deposition technique with the tuned OLED architecture was applied and resulted in improved OLED parameters.
Authors
- Margarita Anna Zommere (ORCID: https://orcid.org/0009-0003-9089-1221)
- Ju̅ratė Simokaitienė (ORCID: https://orcid.org/0000-0003-0657-4980)
- Amjad Ali (ORCID: https://orcid.org/0000-0003-0878-6901)
- Oleksandr Bezvikonnyi (ORCID: https://orcid.org/0009-0003-2700-7325)
- Khrystyna Ivaniuk (ORCID: https://orcid.org/0000-0003-1264-3532)
- Hryhorii Starykov (ORCID: https://orcid.org/0000-0002-3441-694X)
- Raitis Gržibovskis (ORCID: https://orcid.org/0000-0001-5863-2295)
- Pavlo Stakhira (ORCID: https://orcid.org/0000-0001-5210-415X)
- Glib Baryshnikov (ORCID: https://orcid.org/0000-0002-0716-3385)
- Juozas V. Gražulevičius (ORCID: https://orcid.org/0000-0002-4408-9727)
- Anna Pidluzhna (ORCID: https://orcid.org/0000-0003-1138-8736)
- Dmytro Yu. Volyniuk (ORCID: https://orcid.org/0000-0003-3526-2679)
- Aivars Vembris (ORCID: https://orcid.org/0000-0002-9346-946X)
- Melita Baronaite
Institutions
- Linköping University (SE)
- Kaunas University of Technology (LT)
- Cherkasy National University (UA)
- University of Latvia (LV)
- Lviv Polytechnic National University (UA)
Publication Details
- Journal
- Molecules
- Published
- 2024-10-17
- DOI
- https://doi.org/10.3390/molecules29204918
- Citations
- 5
- Primary Topic
- Organic Light-Emitting Diodes Research
- Type
- article
- Field-Weighted Citation Impact
- 1.04