Jacket-like structure of donor-acceptor chromophores-based conducting polymers for photovoltaic cell applications
Journal
Journal of Polymer Science, Part A: Polymer Chemistry
Journal Volume
48
Journal Issue
7
Pages
1607-1616
Date Issued
2010
Author(s)
Abstract
Through the Stille coupling polymerization, a series of soluble acceptor/donor quinoxaline/thiophene alternating conducting polymers with a hole-transporting moiety of carbazole as a side chain (PCPQT) has been designed, synthesized, and investigated. The UV-vis measurement of the chargetransferred type PCPQTs of different molecular weights with low polydispersity exhibits a red shifting of their absorption maximum from 530 to 630 nm with increasing chain length (Mn: from 1100 to 19,200). The HOMO and LUMO energy levels of PCPQT can be determined from the cyclic voltammetry measurement to be -5.36 and -3.59 eV, respectively. Solar cells made from PCPQT/PCBM bulk heterojunction show a high open-circuit voltage, Voc of ∼0.75 V, which is significantly higher than that of a solar cell made from conventional poly(3- hexyl thiophene)/PCBM as the active polymer PCPQT has lower HOMO level. Further improvements are anticipated through a rational design of the new low band-gap and the structurally two-dimensional donor-acceptor conducting polymers. © 2010 Wiley Periodicals, Inc.
SDGs
Other Subjects
Absorption maxima; Active polymers; Band gaps; Bulk heterojunction; Donor-acceptors; Fractionation of polymers; Hole transporting; LUMO energy levels; Rational design; Redshifting; Side chains; Stille coupling; Structure property relation; UV-vis spectroscopy; Chromophores; Conducting polymers; Electrochemistry; Heterojunctions; Open circuit voltage; Organic conductors; Photovoltaic cells; Polydispersity; Solar cells; Thiophene; Ultraviolet spectroscopy; Cyclic voltammetry; Manganese; Manganese compounds; Cyclic voltammetry; Conducting polymers
Publisher
John Wiley and Sons Inc.
Type
journal article