| Title |
Naphthyridine-based donor–acceptor boron difluoride complexes targeting red emission in organic light-emitting diodes |
| Authors |
Lahna, Omar ; Kutsiy, Stepan ; Volyniuk, Dmytro ; Luboradzki, Roman ; Andresen, Elina ; Resch-Genger, Ute ; Grazulevicius, Juozas V ; Stakhira, Pavlo ; Potopnyk, Mykhaylo A |
| DOI |
10.1002/adom.71354 |
| Full Text |
|
| Is Part of |
Advanced optical materials.. Weinheim : Wiley-VCH. 2026, vol. 14, iss. 25, art. no. e71354, p. 1-16.. ISSN 2195-1071 |
| Keywords [eng] |
difluoroboron dyes ; donor-acceptor dyes ; exciplex ; optoelectronics ; organic semiconductors ; solid-state emission |
| Abstract [eng] |
Four donor–acceptor boron difluoride complexes 1–4 based on triphenylamine electron donor and [1,3,5,2]oxadiazaborinino[3,4-a][1,8]naphthyridine acceptor are synthesized and systematically investigated as emissive and charge-transport materials for organic optoelectronics. Comprehensive spectroscopic and electrochemical studies reveal a pronounced intramolecular charge transfer character of these compounds, leading to solvent-polarity-dependent photophysical properties such as bathochromically shifted emission spectra. Charge-carrier mobility measurements demonstrate balanced hole and electron transport properties, highlighting the potential of these materials for optoelectronic applications. In the solid state, compounds 1 and 2 exhibit near-unity photoluminescence quantum yields (PLQY) in polymethylmethacrylate and 1,3-bis(N-carbazolyl)benzene matrices, whereas the CF3-substituted analogues 3 and 4 show markedly red-shifted emission accompanied by reduced PLQYs. The dyes are successfully employed as emitters in organic light-emitting diodes (OLEDs) using doping-free, host-containing, and interface exciplex-forming architectures, as well as multiple ultrathin emissive layer configurations, exhibiting an external quantum efficiency of up to 12.76% in the best case. Furthermore, compounds 3 and 4 enable the fabrication of far-red OLEDs with triple ultrathin emissive layer configurations, exhibiting electroluminescence maxima at 650 and 688 nm, respectively. These results establish donor–acceptor boron difluoride complexes as promising platforms for color-tunable emission and diverse OLED device architectures. |
| Published |
Weinheim : Wiley-VCH |
| Type |
Journal article |
| Language |
English |
| Publication date |
2026 |
| CC license |
|
