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- W2892480735 abstract "We developed a postsynthetic treatment to produce impurity n-type doped PbSe QDs with In3+ as the substitutional dopant. Increasing the incorporated In content is accompanied by a gradual bleaching of the interband first-exciton transition and concurrently the appearance of a size-dependent, intraband absorption, suggesting the controlled introduction of delocalized electrons into the QD band edge states under equilibrium conditions. We compare the optical properties of our In-doped PbSe QDs to cobaltocene treated QDs, where the n-type dopant arises from remote reduction of the PbSe QDs and observe similar behavior. Spectroelectrochemical measurements also demonstrate characteristic n-type signatures, including both an induced absorption within the electrochemical bandgap and a shift of the Fermi-level toward the conduction band. Finally, we demonstrate that the In3+ dopants can be reversibly removed from the PbSe QDs, whereupon the first exciton bleach is recovered. Our results demonstrate that PbSe QDs can be controllably n-type doped via impurity aliovalent substitutional doping." @default.
- W2892480735 created "2018-10-05" @default.
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- W2892480735 date "2018-09-26" @default.
- W2892480735 modified "2023-09-27" @default.
- W2892480735 title "<i>n</i>-Type PbSe Quantum Dots via Post-Synthetic Indium Doping" @default.
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- W2892480735 doi "https://doi.org/10.1021/jacs.8b07910" @default.
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