title: Conductance Switch of a Bromoplumbate Bistable Semiconductor by Electron-Transfer Thermochromism.
abstract: Electron-transfer (redox) thermochromism was successfully used for switching the conductance of semiconductors, by introducing a thermally active organic component into an inorganic semiconducting framework. A moisture-resistant semiconductor {(MV)2[Pb7Br18]}n(MV2+=methyl viologen cation) has been prepared through an in situ synthetic method for MV2+. It features a rare 3D haloplumbate open framework and unprecedented electron-transfer thermochromic behavior in haloplumbates. The electrical conductivity of this compound dropped significantly after coloration and restored after decoloration, which was satisfactorily explained by valence band XPS and theoretical data. This work not only offers a new approach to modify electrical properties of semiconductors without altering components or structures, but may lead to the development of over-temperature color indicators, circuit overload protectors or photovoltaic materials.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Yangqiao west road 155#, Fuzhou, Fujian, 350002, China.
authors.forename: Cai
authors.initials: C
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Yangqiao west road 155#, Fuzhou, Fujian, 350002, China.
authors.forename: Ming-Sheng
authors.initials: MS
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Yangqiao west road 155#, Fuzhou, Fujian, 350002, China.
authors.forename: Pei-Xin
authors.initials: PX
authors.lastname: Li
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Yangqiao west road 155#, Fuzhou, Fujian, 350002, China.
authors.forename: Guo-Cong
authors.initials: GC
authors.lastname: Guo
keywords: electron transfer; halides; semiconductors; solid-state structures; thermochromism