Foldable semi-ladder polymers: novel aggregation behavior and high-performance solution-processed organic light-emitting transistors
Autor: | Wei Chen, Xunshan Liu, Mohammad A. Awais, Luping Yu, Dafei Yuan, Andriy Neshchadin, Valerii Sharapov, Mrinal K. Bera |
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Rok vydání: | 2020 |
Předmět: | |
Zdroj: | Chemical Science |
ISSN: | 2041-6539 2041-6520 |
DOI: | 10.1039/d0sc04068a |
Popis: | A critical issue in developing high-performance organic light-emitting transistors (OLETs) is to balance the trade-off between charge transport and light emission in a semiconducting material. Although traditional materials for organic light-emitting diodes (OLEDs) or organic field-effect transistors (OFETs) have shown modest performance in OLET devices, design strategies towards high-performance OLET materials and the crucial structure–performance relationship remain unclear. Our research effort in developing cross-conjugated weak acceptor-weak donor copolymers for luminescent properties lead us to an unintentional discovery that these copolymers form coiled foldamers with intramolecular H-aggregation, leading to their exceptional OLET properties. An impressive external quantum efficiency (EQE) of 6.9% in solution-processed multi-layer OLET devices was achieved. Coiled foldamers with intramolecular H-aggregation in semi-ladder copolymers lead towards the highest EQE of 6.9% in solution-processed multi-layer OLETs. |
Databáze: | OpenAIRE |
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