The development of layer-oriented two-dimensional conjugated metal-organic frameworks (2D c-MOFs) enables an access to direct charge transport, dial-in lateral/vertical electronic devices and unveil transport mechanisms, but remains a significant synthetic challenge. Here we report the novel synthesis of metal-phthalocyanine-based p-type semiconducting 2D c-MOF films (Cu2[PcM-O8], M=Cu or Fe) with an unprecedented edge-on layer-orientation at the air/water interface. The edge-on structure for-mation is guided by the pre-organization of metal-phthalocyanine ligands, whose basal plane is perpendicular to the water surface due to their π-π interaction and hydrophobicity. Benefiting from the unique layer orientation, we are able to investigate the lateral and vertical conductivities by DC methods, and thus demonstrate an anisotropic charge transport in the resulting Cu2[PcCu-O8] film. The directional conductivity studies combined with theoretical calculation identify that the intrinsic conductivity is dominated by charge transfer along the interlayer pathway. Moreover, a macroscopic (cm2-size) Hall-effect measurement reveals a Hall mobility of ~4.4 cm2 V-1 s-1 for the obtained Cu2[PcCu-O8] film. The orientation control in semiconducting 2D c-MOFs will enable the develop-ment of various optoelectronic applications and the exploration of unique transport properties.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:80399 |
| Date | 15 August 2022 |
| Creators | Wang, Zhiyong, Walter, Lisa S., Wang, Mao, St. Petkov, Petko, Liang, Baokun, Qi, Haoyuan, Nguyen, Nguyen Ngan, Hambsch, Mike, Zhong, Haixia, Wang, Mingchao, Park, SangWook, Renn, Lukas, Watanabe, Kenji, Taniguchi, Takashi, Mannsfeld, Stefan C. B., Heine, Thomas, Kaiser, Ute, Zhou, Shengqiang, Weitz, Ralf Thomas, Feng, Xinliang, Dong, Renhao |
| Publisher | American Chemical Society |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/acceptedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 1520-5126, 10.1021/jacs.1c05051, 10.1021/jacs.1c05051, info:eu-repo/grantAgreement/European Commission/H2020 | SGA-RIA/881603//Graphene Flagship Core Project 3/GrapheneCore3, info:eu-repo/grantAgreement/European Commission/H2020 | ERC | ERC-STG/852909//Development of Functional Conjugated Two-Dimensional Metal-Organic Frameworks/FC2DMOF, info:eu-repo/grantAgreement/European Commission/H2020 | ERC | ERC-COG/819698//Development of Thiophene Based Conjugated Polymers in Two Dimensions/T2DCP, info:eu-repo/grantAgreement/Deutsche Forschungsgemeinschaft/Sonderforschungsbereich/417590517//Chemie der synthetischen zweidimensionalen Materialien/SFB 1415, info:eu-repo/grantAgreement/Deutsche Forschungsgemeinschaft/Schwerpunktprogramm/273920491//Koordinationsnetzwerke als Bausteine für Funktionssystem/SPP 1928, info:eu-repo/grantAgreement/European Commission/H2020 | MSCA-ITN-ETN/813036//Bottom-Up generation of atomicalLy precise syntheTIc 2D MATerials for high performance in energy and Electronic applications – A multi-site innovative training action/ULTIMATE |
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