By optimizing the molecular organization of blue-emitting organic semiconductors, the vulnerability of the materials to extrinsic impurities that cause charge trapping, such as oxygen and water, is strongly reduced. Steric shielding of the electron-transporting core is shown to increase the electron transport by several orders of magnitude.
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This is a summary of: Sachnik, O. et al. Elimination of charge-carrier trapping by molecular design. Nat. Mater. https://doi.org/10.1038/s41563-023-01592-3 (2023).
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Large-bandgap organic semiconductors with trap-free charge transport. Nat. Mater. 22, 1063–1064 (2023). https://doi.org/10.1038/s41563-023-01621-1