- AutorIn
- Mingchao Wang Technische Universität Dresden, Fakultät Chemie und Lebensmittelchemie, Professur für Molekulare Funktionsmaterialien#Technische Universität Dresden, Center for Advancing Electronics Dresden (cfaed)
- Marco Ballabio
- Mao Wang
- Hung-Hsuan Lin
- Bishnu P. Biswal
- Xiaocang Han
- Silvia Paasch
- Eike Brunner
- Pan Liu
- Mingwei Chen
- Mischa Bonn
- Thomas Heine
- Shengqiang Zhou
- Enrique Cánovas
- Renhao Dong
- Xinliang Feng
- Titel
- Unveiling Electronic Properties in Metal–Phthalocyanine-Based Pyrazine-Linked Conjugated Two-Dimensional Covalent Organic Frameworks
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-724502
- Quellenangabe
- Journal of the American Chemical Society
Erscheinungsjahr: 2019
Jahrgang: 141
Heft: 42
Seiten: 16810-16816
ISSN: 1520-5126 - Erstveröffentlichung
- 2019
- Abstract (EN)
- π-Conjugated two-dimensional covalent organic frameworks (2D COFs) are emerging as a novel class of electro-active materials for (opto-)electronic and chemiresistive sensing applications. However, understanding the intricate interplay between chemistry, structure and conductivity in π-conjugated 2D COFs remains elusive. Here, we report a detailed charac-terization for the electronic properties of two novel samples consisting of Zn- and Cu-phthalocyanine-based pyrazine-linked 2D COFs. These 2D COFs are synthesized by condensation of metal-phthalocyanine (M=Zn and Cu) and pyrene derivatives. The obtained polycrystalline-layered COFs are p-type semiconductors both with a band gap of ~1.2 eV. Mobilities up to ~5 cm²/Vs are resolved in the dc limit, which represent a lower threshold induced by charge carrier localization at crystalline grain boundaries. Hall Effect measurements (dc limit) and terahertz (THz) spectroscopy (ac limit) in combination with den-sity functional theory (DFT) calculations demonstrate that varying metal center from Cu to Zn in the phthalocyanine moiety has a negligible effect in the conductivity (~5×10⁻⁷ S/cm), charge carrier density (~10¹² cm⁻³), charge carrier scattering rate (~3×10¹³ s⁻¹), and effective mass (~2.3m₀) of majority carriers (holes). Notably, charge carrier transport is found to be aniso-tropic, with hole mobilities being practically null in-plane and finite out-of-plane for these 2D COFs.
- Andere Ausgabe
- Link zum Artikel der zuerst in der Zeitschrift 'Journal of the American Chemical Society' erschienen ist
DOI: 10.1021/jacs.9b07644 - Freie Schlagwörter (DE)
- Kovalente organische Strukturen, Metalle, Ladungsträgerdynamik, Mobilität, elektrische Leitfähigkeit
- Freie Schlagwörter (EN)
- Covalent organic frameworks, Metals, Carrier dynamics, Mobility, Electrical conductivity
- Klassifikation (DDC)
- 540
- Verlag
- American Chemical Society, Washington, DC
- Förder- / Projektangaben
- European Commission (EC)
H2020 | ERC | ERC-COG Development of Thiophene Based Conjugated Polymers in Two Dimensions
(T2DCP)
ID:  819698 - European Commission (EC)
H2020 | ERC | ERC-STG
Development of Functional Conjugated Two-Dimensional Metal-Organic Frameworks
(FC2DMOF)
ID:  852909 - Deutsche Forschungsgemeinschaft (DFG)
Exzellenzcluster
Center of Advancing Electronics Dresden
(cfaed)
ID:  194636624 - Deutsche Forschungsgemeinschaft (DFG)
Koordinationsnetzwerke als Bausteine für Funktionssysteme
(COORNET)
ID:  273920491 - Version / Begutachtungsstatus
- publizierte Version / Verlagsversion
- URN Qucosa
- urn:nbn:de:bsz:14-qucosa2-724502
- Veröffentlichungsdatum Qucosa
- 04.03.2021
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis