Recent Advances in the Synthesis of Electron Donor Conjugated Terpolymers for Solar Cell Applications

Desta Gedefaw; Xun Pan; Mats R. Andersson

doi:10.3389/fmats.2020.00280

Recent Advances in the Synthesis of Electron Donor Conjugated Terpolymers for Solar Cell Applications

Desta Gedefaw, Xun Pan, Mats R. Andersson

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Abstract

The synthesis of donor (D)-acceptor (A) polymers using structurally elaborated monomers is an active research field. Some of the challenges with the use of alternating D-A polymers for photovoltaic applications are the relatively narrow absorption widths, the presence an absorption valleys in the visible region, unoptimized molecular energy levels and even lack of compatibility of the polymers with the common acceptors. The synthesis and characterization of polymers consisting of multiple chromophores (random and regular terpolymers) with complementing properties is currently gaining momentum in order to delicately optimize properties of polymers. A random terpolymer can either be of a system composed of one donor and two acceptors [(D-A1)-ran-(D-A2)] or a one acceptor and two donor segments [(D1-A)-ran-(D2-A)] incorporated in the polymer backbone. By varying the composition of the monomers in the feed of the polymerization reaction, the properties of the resulting terpolymers can be carefully optimized. Using this strategy, many materials with desired properties have been developed and power conversion efficiency (PCE) surpassing 14% in a single layer bulk heterojunction (BHJ) solar cell device have been reported. This review summarizes the most recent advances made in the development of electron donor terpolymers for organic photovoltaics (OPVs). The properties of the terpolymers are compared with their respective reference polymer.

Original language	English
Article number	280
Number of pages	28
Journal	Frontiers in Materials
Volume	7
DOIs	https://doi.org/10.3389/fmats.2020.00280
Publication status	Published - 18 Aug 2020

Bibliographical note

Copyright © 2020 Gedefaw, Pan and Andersson. This is an open-access article
distributed under the terms of the Creative Commons Attribution License (CC BY).
The use, distribution or reproduction in other forums is permitted, provided the
original author(s) and the copyright owner(s) are credited and that the original
publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

Keywords

conjugated polymers
random terpolymers
regular terpolymers
solar cells
terpolymers

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Gedefaw_Recent_P2020Final published version, 1.77 MBLicence: CC BY

Cite this

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abstract = "The synthesis of donor (D)-acceptor (A) polymers using structurally elaborated monomers is an active research field. Some of the challenges with the use of alternating D-A polymers for photovoltaic applications are the relatively narrow absorption widths, the presence an absorption valleys in the visible region, unoptimized molecular energy levels and even lack of compatibility of the polymers with the common acceptors. The synthesis and characterization of polymers consisting of multiple chromophores (random and regular terpolymers) with complementing properties is currently gaining momentum in order to delicately optimize properties of polymers. A random terpolymer can either be of a system composed of one donor and two acceptors [(D-A1)-ran-(D-A2)] or a one acceptor and two donor segments [(D1-A)-ran-(D2-A)] incorporated in the polymer backbone. By varying the composition of the monomers in the feed of the polymerization reaction, the properties of the resulting terpolymers can be carefully optimized. Using this strategy, many materials with desired properties have been developed and power conversion efficiency (PCE) surpassing 14% in a single layer bulk heterojunction (BHJ) solar cell device have been reported. This review summarizes the most recent advances made in the development of electron donor terpolymers for organic photovoltaics (OPVs). The properties of the terpolymers are compared with their respective reference polymer.",

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Recent Advances in the Synthesis of Electron Donor Conjugated Terpolymers for Solar Cell Applications

Abstract

Bibliographical note

Keywords

UN SDGs

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