Systematic Study of the Electronic States in Electron‐Doped Polyacenes

Autor:	Yoichi Tanabe, Katsumi Tanigaki, Satoshi Heguri, Quynh Phan, Hidekazu Shimotani
Rok vydání:	2014
Předmět:	Anthracene Condensed matter physics business.industry Doping Inorganic Chemistry Pentacene Organic semiconductor chemistry.chemical_compound Nuclear magnetic resonance Tetracene Semiconductor chemistry Antiferromagnetism Crystallite business
Zdroj:	European Journal of Inorganic Chemistry. 2014:4033-4038
ISSN:	1099-0682 1434-1948
Popis:	High-quality polycrystalline polyacenes (PLAs) of anthracene (AN), tetracene (TN), and pentacene (PN) doped with potassium in the 1:1 and 1:2 stoichiometries are prepared and their physical properties are systematically studied by magnetic measurements. The magnetic susceptibilities as a function of temperature for Kx(PLAs) are interpreted in the framework of a band-filling model. Clear evidence for the occurrence of charge transfer from K to the organic semiconductors is provided. K1(AN) prepared by a solid-state diffusion process exhibits a pronounced magnetic hump at 140 K, which is associated with antiferromagnetic interactions ascribed to the on-site Coulomb repulsion in a Mott insulating state, whereas both K1(TN) and K1(PN) show a conventional Curie–Weiss behavior at low temperatures. We successfully demonstrate the tuning of the electronic states of PLA-type semiconductors in bulk. Comments are given about the possibility of metallic states in potassium-doped PLAs, which have recently been reported for other polycyclic aromatic hydrocarbons.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cc3cb374c84181e823c1e7ddb53a248c https://doi.org/10.1002/ejic.201402381 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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