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David Zhitomirsky, Melissa Furukawa, Jiang Tang, Philipp Stadler, Sjoerd Hoogland, Oleksandr Voznyy, Huan Liu and Edward H. Sargent N-Type Colloidal-Quantum-Dot Solids for Photovoltaics Advanced Materials 24

Article first published online: 12 SEP 2012 | DOI: 10.1002/adma.201202825

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N-type PbS colloidal-quantum-dot (CQD) films are fabricated using a controlled halide chemical treatment, applied in an inert processing ambient environment. The new materials exhibit a mobility of 0.1 cm2 V−1 s−1. The halogen ions serve both as a passivating agent and n-dope the films via substitution at surface chalcogen sites. The majority electron concentration across the range 1016 to 1018 cm−3 is varied systematically.

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