一种低能带隙结晶完整的D-A型共轭导电聚合物电化学沉积与表征

doi:10.11896/cldb.19090230

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Abstract The low bandgap conjugated polymer with electron donor (D)-electron acceptor (A) units is a novel semiconducting material, which has been paid close attention to and studied extensively in the past 20 years. The chain structure and composition of D-A type low bandgap polymer directly determine its physical properties such as optical, electrochemistry, electronic and so on. 4,5-diamino-orthodicyanide benzene is a 2-dimension charge-transferring molecule and has unique physical properties because there are two electron-donating groups (-NH₂) and two electron-withdrawing groups (-CN) and they are bonded to the same aromatic ring at para-position, respectively. In this work, tetrabutylammonium tetrafluoroborate dissolved in acetonitrile/water solution was used as an electrolyte, electrochemical oxidation polymerizes of 4,5-diamino-orthodicyanide benzene was carried out using cyclic voltammetry(CV) and the polymer films were deposited on ITO glass electrode surface. Their crystal structure, morphology, thermal properties were characterizated, and the electron energy levels (HOMO/LUMO) and energy gap were calculated for the deposited polymers by testing their electrochemical and optical properties. An optimized electrochemical polymerization condition was concluded for 4,5-diamino-orthodicyanide benzene monomer based on the study that the effect of acetonitrile/water volume ratio in electrolyte, CV scanning rate, CV scanning cycle on electrochemical polymerization of the monomer and on the structures and properties of the deposited polymer, and a novel N-type organic semi-conductor D-A conjugated polymer with low bandgap, perfect crystalline morphology and high thermal stability was successfully prepared.

Key words： D-A type conjugated conductive polymer electrochemical deposition cyclic voltammetry organic semi-conductor

Published: 06 November 2020

CLC number:

TB381

Fund:National Natural Science Foundation of China (11975173).

About author:: Xiaokang Ligraduated from Wuhan University of Science and Technology with a bachelor’s degrees in physics in 2017. Now he is a master student at Wuhan University of Science and Technology and is conducting research under the guidance of Professor Pengshun Jin. At present, he is focusing on the research of preparation and characterization of organic semiconductor materials.
Shunjin Pengreceived his Ph.D. degree in materials from Donghua University in 2003. He is currently a professor in Wuhan University of Science and Technology and devotes himself to the study and teaching on physics and chemistry of organic functional materials. His research interests are preparation of functional materials, two-dimensional organic semiconductor materials and devices.

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	LI Xiaokang
	ZHU Sicong
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Cite this article:

LI Xiaokang,ZHU Sicong,ZHANG Rengang, et al. Electrochemical Deposition and Characterization of a Novel Low Bandgap and Crystalline Perfection D-A Type Conjugated Conducting Polymer[J]. Materials Reports, 2020, 34(20): 20147-20151.

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http://www.mater-rep.com/EN/10.11896/cldb.19090230 OR http://www.mater-rep.com/EN/Y2020/V34/I20/20147

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