Publication date: 15th May 2025
The optoelectronic performance of quantum dots (QDs) is highly dependent on their surface chemistry, where the choice of ligand plays a critical role in modulating emission properties, charge transport, and energy level alignment. Achieving narrow emission linewidths and efficient charge injection remains a central challenge in advancing QD-based devices such as quantum light emitting diodes (QLEDs). The present study explores the integration of conjugated organic ligands specifically designed with donor–acceptor backbones and electron-withdrawing substituents as a strategy to tailor the HOMO–LUMO energy levels at the QD interface. These ligands, inspired by materials previously developed for organic field effect transistors, offer tunable optoelectronic properties and synthetic versatility. By adjusting the electronic character of the conjugated units, it is possible to optimize exciton confinement and potentially enhance device efficiency. Drawing on recent literature and early synthetic efforts, we highlight design considerations for ligand structures, discuss surface attachment strategies, and examine how electronic modulation at the molecular level can translate to improved QD performance. This approach provides a flexible way to improve QD–ligand interactions by designing ligands with targeted electronic properties.
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