Tunable electrical conductivity in oriented thin films of tetrathiafulvalene-based covalent organic framework

被引：311

作者：

Cai, Song-Liang ^{[1
,2
]}

Zhang, Yue-Biao ^{[3
,4
]}

Pun, Andrew B. ^{[1
]}

He, Bo ^{[1
]}

Yang, Jinhui ^{[4
,5
]}

Toma, Francesca M. ^{[3
,6
]}

Sharp, Ian D. ^{[3
,7
]}

Yaghi, Omar M. ^{[3
,4
]}

Fan, Jun ^{[2
]}

Zheng, Sheng-Run ^{[2
]}

Zhang, Wei-Guang ^{[2
]}

Liu, Yi ^{[1
]}

机构：

[1] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA 94720 USA

[2] S China Normal Univ, Sch Chem & Environm, Guangzhou 510006, Guangdong, Peoples R China

[3] Univ Calif Berkeley, Kavli Energy Nanosci Inst Berkeley, Dept Chem, Berkeley, CA 94720 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA

[5] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Joint Ctr Artificial Photosynth, Berkeley, CA 94720 USA

[6] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Chem Sci Div, Berkeley, CA 94720 USA

[7] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Phys Biosci Div, Berkeley, CA 94720 USA

来源：

CHEMICAL SCIENCE | 2014年 / 5卷 / 12期

关键词：

TTF; CRYSTALLINE; DERIVATIVES;

D O I：

10.1039/c4sc02593h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Despite the high charge-carrier mobility in covalent organic frameworks (COFs), the low intrinsic conductivity and poor solution processability still impose a great challenge for their applications in flexible electronics. We report the growth of oriented thin films of a tetrathiafulvalene-based COF (TTF-COF) and its tunable doping. The porous structure of the crystalline TTF-COF thin film allows the diffusion of dopants such as I-2 and tetracyanoquinodimethane (TCNQ) for redox reactions, while the closely packed 2D grid sheets facilitate the cross-layer delocalization of thus-formed TTF radical cations to generate more conductive mixed-valence TTF species, as is verified by UV-vis-NIR and electron paramagnetic resonance spectra. Conductivity as high as 0.28 S m(-1) is observed for the doped COF thin films, which is three orders of magnitude higher than that of the pristine film and is among the highest for COF materials.

引用

页码：4693 / 4700

页数：8

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