Jump to main content
Jump to site search

Issue 30, 2018
Previous Article Next Article

Cyanovinylene-based copolymers synthesized by tin-free Knoevenagel polycondensation for high efficiency polymer solar cells

Author affiliations

Abstract

A series of π-conjugated copolymers based on benzo[1,2-b:4,5-b′]dithiophene (BDT) and cyanovinylene (CNV) moieties was synthesized by a green, tin-free Knoevenagel polycondensation and they were used as an electron donor for polymer solar cells. This synthetic method results in improved atom economy, the non-use of metal catalysts and the generation of only benign by-products. The relationship between the structure and performance was studied including the optical properties, electrochemical properties, thermal stability, morphologies and the performance in solar cells as donor materials. These copolymers showed broad absorption spectra in the UV-visible region and low-lying HOMO levels at about −5.50 eV due to the presence of the CNV unit. The open-circuit voltages (VOC) of the devices were near to 1.0 eV. A PCE of 8.54% was obtained with the device based on PdC8ThDT:ITIC due to the high hole mobility and excellent morphology of the active layer blend film.

Graphical abstract: Cyanovinylene-based copolymers synthesized by tin-free Knoevenagel polycondensation for high efficiency polymer solar cells

Back to tab navigation

Supplementary files

Article information


Submitted
27 Apr 2018
Accepted
03 Jul 2018
First published
05 Jul 2018

J. Mater. Chem. C, 2018,6, 8020-8027
Article type
Paper

Cyanovinylene-based copolymers synthesized by tin-free Knoevenagel polycondensation for high efficiency polymer solar cells

C. Cao, M. Xiao, X. Yang, J. Zhang, F. Huang and Y. Cao, J. Mater. Chem. C, 2018, 6, 8020
DOI: 10.1039/C8TC02021C

Social activity

Search articles by author

Spotlight

Advertisements