High efficiency and low efficiency roll-off hole-transporting layer-free solution-processed fluorescent NIR-OLEDs based on oligothiophene–benzothiadiazole derivatives
Taweesak Sudyoadsuk, Pongsakorn Chasing, Terdkait Kaewpuang, Thanaporn Manyum, Chaiyon Chaiwai, Supawadee Namuangruk, Vinich Promarak
Abstract
Two D–A–D type emitters exhibited superior simple hole-transporting free solution-processed OLEDs with maximum EQE of 1.52%, low efficiency roll-off and maximum radiance of 4463 mW Sr<sup>−1</sup> m<sup>−2</sup>, which is one the best solution-processed NIR-OLEDs.
Topics & Concepts
OLEDMaterials scienceFluorescenceQuantum efficiencyOptoelectronicsLayer (electronics)Solution processNanotechnologyOpticsPhysicsOrganic Light-Emitting Diodes ResearchOrganic Electronics and PhotovoltaicsConducting polymers and applications