HELIOS has reached an important dissemination milestone: five peer-reviewed articles produced within the project are now published and collected on our website. Together they trace the project’s path toward efficient, sustainable white-emitting organic lighting systems — from fundamental molecular design to complete light-emitting devices.
The papers reflect exactly the kind of international, cross-institutional science HELIOS was built to enable. They bring together Lviv Polytechnic National University, Kaunas University of Technology, the University of Barcelona, and the Polish Academy of Sciences, with several works co-authored across the project’s twinning partnerships.
What the five papers cover
The collection opens with two contributions on quantum-well OLEDs from the Lviv Polytechnic team. The first is an experimental demonstration of red-emitting devices based on the carbazole derivative 4CzTPN-Ph, comparing a conventional host–guest structure with a triple-cascade quantum-well design in which an ultrathin 5 nm emitter layer produces noticeably narrower emission spectra. This is one of the first OLED demonstrations from the HELIOS twinning team and establishes a working reference platform for tuning emitter layers. The second, a comprehensive review of more than 45 pages, maps how quantum-well structures are used across OLED technology, consolidating the scientific foundation the project builds on. A third paper, a collaboration between the Kaunas partner and the University of Barcelona, introduces a fast two-step synthetic route to highly π-extended, butterfly-shaped molecules built around a dibenzothiophene core, expanding the project’s toolbox of organic semiconductor building blocks. The final two papers speak directly to the white-light goal at the heart of HELIOS. One presents bright difluoroboron complexes engineered as a dedicated yellow emitter — a key ingredient for the blue-plus-yellow route to white OLEDs — joining Lviv Polytechnic, Kaunas, and the Polish Academy of Sciences. The other reports a single donor–π–acceptor molecule (DBP-PXZ) that can emit either pure blue or balanced white light depending on molecular packing, pointing toward single-component white OLEDs that are simpler, cheaper, and more reproducible.
Why it matters White light is the destination HELIOS is named for, and these papers show the project advancing on every front needed to reach it: new materials, new device architectures, and a deepening body of shared knowledge across the consortium. Beyond the science, they demonstrate the collaboration model working in practice and mark Lviv Polytechnic’s growing authority in quantum-well OLED research.
All five articles, with overviews and direct links to the journals, are available on our Publications page
We acknowledge the support of the European Union under Horizon Europe for the HELIOS project (Grant Agreement 101155017).
HELIOS has reached an important dissemination milestone: five peer-reviewed articles produced within the project are now published and collected on our website. Together they trace the project’s path toward efficient, sustainable white-emitting organic lighting systems — from fundamental molecular design to complete light-emitting devices.
The papers reflect exactly the kind of international, cross-institutional science HELIOS was built to enable. They bring together Lviv Polytechnic National University, Kaunas University of Technology, the University of Barcelona, and the Polish Academy of Sciences, with several works co-authored across the project’s twinning partnerships.
What the five papers cover
The collection opens with two contributions on quantum-well OLEDs from the Lviv Polytechnic team. The first is an experimental demonstration of red-emitting devices based on the carbazole derivative 4CzTPN-Ph, comparing a conventional host–guest structure with a triple-cascade quantum-well design in which an ultrathin 5 nm emitter layer produces noticeably narrower emission spectra. This is one of the first OLED demonstrations from the HELIOS twinning team and establishes a working reference platform for tuning emitter layers. The second, a comprehensive review of more than 45 pages, maps how quantum-well structures are used across OLED technology, consolidating the scientific foundation the project builds on.
A third paper, a collaboration between the Kaunas partner and the University of Barcelona, introduces a fast two-step synthetic route to highly π-extended, butterfly-shaped molecules built around a dibenzothiophene core, expanding the project’s toolbox of organic semiconductor building blocks.
The final two papers speak directly to the white-light goal at the heart of HELIOS. One presents bright difluoroboron complexes engineered as a dedicated yellow emitter — a key ingredient for the blue-plus-yellow route to white OLEDs — joining Lviv Polytechnic, Kaunas, and the Polish Academy of Sciences. The other reports a single donor–π–acceptor molecule (DBP-PXZ) that can emit either pure blue or balanced white light depending on molecular packing, pointing toward single-component white OLEDs that are simpler, cheaper, and more reproducible.
Why it matters
White light is the destination HELIOS is named for, and these papers show the project advancing on every front needed to reach it: new materials, new device architectures, and a deepening body of shared knowledge across the consortium. Beyond the science, they demonstrate the collaboration model working in practice and mark Lviv Polytechnic’s growing authority in quantum-well OLED research.
All five articles, with overviews and direct links to the journals, are available on our Publications page
We acknowledge the support of the European Union under Horizon Europe for the HELIOS project (Grant Agreement 101155017).
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