title: Fluorene-Based Two-Dimensional Covalent Organic Framework with Thermoelectric Properties through Doping.
abstract: Organic semiconductors have great potential as flexible thermoelectric materials. A fluorene-based covalent organic framework (FL-COF-1) was designed with the aim of creating an enhanced π-π interaction among the crystalline backbones. By the introduction of fluorene units into the frameworks, the FL-COF-1 had high thermal stability with a BET surface area over 1300 m2g-1. The open frameworks were favorable for doping with iodine and followed with the improved charge carrier mobility. The compressed pellet of I2@FL-COF-1 exhibited a high Seebeck coefficient of 2450 μV K-1and power factor of 0.063 μW m-1K-2at room temperature, giving the first example of COFs' potential application as thermoelectric materials.
authors.affiliation: Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China.
authors.forename: Liangying
authors.initials: L
authors.lastname: Wang
authors.affiliation: Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China.|College of Chemical Engineering, China University of Mining and Technology , Xuzhou 221116, China.
authors.forename: Bin
authors.identifier: http://orcid.org/0000-0001-9493-1882
authors.initials: B
authors.lastname: Dong
authors.affiliation: Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China.
authors.forename: Rile
authors.initials: R
authors.lastname: Ge
authors.affiliation: College of Pharmacy, Jiangxi Science and Technology Normal University , Nanchang 330013, China.
authors.forename: Fengxing
authors.identifier: http://orcid.org/0000-0001-8907-9445
authors.initials: F
authors.lastname: Jiang
authors.affiliation: College of Pharmacy, Jiangxi Science and Technology Normal University , Nanchang 330013, China.
authors.forename: Jingkun
authors.initials: J
authors.lastname: Xu
keywords: covalent organic frameworks; electrical conductivity; fluorene units; iodine doping; thermoelectric properties