Alloyed (ZnS)x(Cu2SnS3)1−xand (CuInS2)x(Cu2SnS3)1−xnanocrystals with arbitrary composition and broad tunable band gaps

Qinghui Liu; Zechen Zhao; Yuhan Lin; Peng Guo; Shenjie Li; Daocheng Pan; Xiangling Ji

doi:10.1039/c0cc03560b

Alloyed (ZnS)x(Cu2SnS3)1−xand (CuInS2)x(Cu2SnS3)1−xnanocrystals with arbitrary composition and broad tunable band gaps

Chemical Communications ◽

10.1039/c0cc03560b ◽

2011 ◽

Vol 47 (3) ◽

pp. 964-966 ◽

Cited By ~ 86

Author(s):

Qinghui Liu ◽

Zechen Zhao ◽

Yuhan Lin ◽

Peng Guo ◽

Shenjie Li ◽

...

Keyword(s):

Band Gaps ◽

Arbitrary Composition

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ChemInform Abstract: Alloyed (ZnS)x(Cu2SnS3)1-x and (CuInS2)x(Cu2SnS3)1-x Nanocrystals with Arbitrary Composition and Broad Tunable Band Gaps.

ChemInform ◽

10.1002/chin.201114018 ◽

2011 ◽

Vol 42 (14) ◽

pp. no-no

Author(s):

Qinghui Liu ◽

Zechen Zhao ◽

Yuhan Lin ◽

Peng Guo ◽

Shenjie Li ◽

...

Keyword(s):

Band Gaps ◽

Arbitrary Composition

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Phonon Band Gaps

Journal de Physique I ◽

10.1051/jp1:1997172 ◽

1997 ◽

Vol 7 (3) ◽

pp. 509-519 ◽

Cited By ~ 5

Author(s):

R. M. Hornreich ◽

M. Kugler ◽

S. Shtrikman ◽

C. Sommers

Keyword(s):

Band Gaps ◽

Phonon Band

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Dibenzochrysene Enables Tightly Controlled Docking and Stabilizes Photoexcited States in Dual-Pore Covalent Organic Frameworks

10.26434/chemrxiv.9638633.v1 ◽

2019 ◽

Author(s):

Torben Sick ◽

Niklas Keller ◽

Nicolai Bach ◽

Andreas Koszalkowski ◽

Julian Rotter ◽

...

Keyword(s):

Molecular Docking ◽

Photophysical Properties ◽

Visible Spectrum ◽

Large Family ◽

Building Blocks ◽

Band Gaps ◽

Docking Site ◽

Covalent Organic Frameworks ◽

Connected Node ◽

Optoelectronic Applications

Covalent organic frameworks (COFs), consisting of covalently connected organic building units, combine attractive features such as crystallinity, open porosity and widely tunable physical properties. For optoelectronic applications, the incorporation of heteroatoms into a 2D COF has the potential to yield desired photophysical properties such as lower band gaps, but can also cause lateral offsets of adjacent layers. Here, we introduce dibenzo[g,p]chrysene (DBC) as a novel building block for the synthesis of highly crystalline and porous 2D dual-pore COFs showing interesting properties for optoelectronic applications. The newly synthesized terephthalaldehyde (TA), biphenyl (Biph), and thienothiophene (TT) DBC-COFs combine conjugation in the a,b-plane with a tight packing of adjacent layers guided through the molecular DBC node serving a specific docking site for successive layers. The resulting DBC-COFs exhibit a hexagonal dual-pore kagome geometry, which is comparable to COFs containing another molecular docking site, namely 4,4′,4″,4‴-(ethylene-1,1,2,2-tetrayl)-tetraaniline (ETTA). In this context, the respective interlayer distances decrease from about 4.60 Å in ETTA-COFs to about 3.6 Å in DBC-COFs, leading to well-defined hexagonally faceted single crystals sized about 50-100 nm. The TT DBC-COFs feature broad light absorption covering large parts of the visible spectrum, while Biph DBC-COF shows extraordinary excited state lifetimes exceeding 10 ns. In combination with the large number of recently developed linear conjugated building blocks, the new DBC tetra-connected node is expected to enable the synthesis of a large family of strongly p-stacked, highly ordered 2D COFs with promising optoelectronic properties.

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