期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 141, 期 2, 页码 743-747出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.8b09900
关键词
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资金
- FlagERA [DFG HE 3543/27-1]
- H2020 Marie Sklodowska-Curie Actions [H2020-MSCA-IF-2016, 751848]
- Marie Curie Actions (MSCA) [751848] Funding Source: Marie Curie Actions (MSCA)
Here we discuss, based on first-principles calculations, two-dimensional (2D) kagome lattices composed of polymerized heterotriangulene units, planar molecules with D-3h point group containing a B, C, or N center atom and CH2, O, or CO bridges. We explore the design principles for a functional lattice made of 2D polymers, which involves control of pi-conjugation and electronic structure of the knots. The former is achieved by the chemical potential of the bridge groups, while the latter is controlled by the heteroatom. The resulting 2D kagome polymers have a characteristic electronic structure with a Dirac band sandwiched by two flat bands and are either Dirac semimetals (C center), or single-band semiconductors-materials with either exclusively electrons (B center) or holes (N center) as charge carriers of very high mobility, reaching values of up to similar to 8 x 10(3) cm(2) V-1 s(-1), which is comparable to crystalline silicon.
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