- N-type colloidal-quantum-dot solids for photovoltaics.
N-type colloidal-quantum-dot solids for photovoltaics.
Advanced materials (Deerfield Beach, Fla.) (2012-09-13)
David Zhitomirsky, Melissa Furukawa, Jiang Tang, Philipp Stadler, Sjoerd Hoogland, Oleksandr Voznyy, Huan Liu, Edward H Sargent
PMID22968808
ABSTRACT
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 cm(2) 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 10(16) to 10(18) cm(-3) is varied systematically.
MATERIALS