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Colloidal Nanocrystals with Inorganic Halide, Pseudohalide, and Halometallate Ligands

Title
Colloidal Nanocrystals with Inorganic Halide, Pseudohalide, and Halometallate Ligands
Author
장재영
Keywords
nanocrystals; surface chemistry; halide ligands; pseudohalide ligands; halometallate ligands; charge transport; carrier mobility
Issue Date
2014-07
Publisher
Amer Chemical SOC
Citation
ACS Nano, 2014, 8(7), P.7359-7369
Abstract
We investigate simple halides and pseudohalides as an important class of inorganic ligands for nanocrystals (NCs) in solution phase ligand exchange. These short, robust, and easy to model ligands bind to the NC surface and provide electrostatic stabilization of NC dispersions in N-methylformamide. The replacement of organic ligands on NCs with compact halide and pseudohalide ligands greatly facilitates electronic communication between NCs. For example, a high electron mobility of mu approximate to 12 cm(2) V-1 s(-1) has been observed in thin films made of I--capped CdSe NCs. We also studied charge transport properties of thin films based on the pseudohalide N-3(-)-capped InAs NCs, suggesting the possibility of obtaining "all III-V" solids. In addition, we extend the surface chemistry of halometallates (e.g., CH3NH3PbI3), which can stabilize colloidal solutions of lead chalcogenide NCs. These halide, pseudohalide, and halometallate ligands enrich the current family of inorganic ligands and can open up more opportunities for applications of NCs in the fields of electronics, optoelectronics, and thermoelectrics.
URI
https://pubs.acs.org/doi/10.1021/nn502470v
ISSN
1936-0851; 1936-086X
DOI
10.1021/nn502470v
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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