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A new strategy for retaining long‐range order during ligand exchange of nanocrystal superlattices is used to construct PbSe infrared photodetectors by Christine Orme and co‐workers (article number 2101166). The ordered photodetectors have a 16× higher responsivity and 2× faster response time compared to disordered ones.
Colloidal semiconductor nanocrystals are important building blocks for low‐cost, solution‐processed electronic devices with tunable functionalities. Considerable progress is made in improving charge transport through nanocrystal films by exchanging long insulating ligands with shorter passivating ligands. To take full advantage of this strategy, it is equally important to fabricate close‐packed structures...
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