A New Quinoxaline and Isoindigo Based Polymer as Donor Material for Solar Cells: Role of Ecofriendly Processing Solvents on the Device Efficiency and Stability
Artikel i vetenskaplig tidskrift, 2017

A new semiconducting polymer based on two different electron deficient (quinoxaline and isoindigo) and electron rich (benzodithiophene) moieties is synthesized, characterized and used as donor material for photovoltaic devices. Blade-coated bulk heterojunction solar cells are fabricated in air by using chlorinated (o-dichlorobenzene) and nonchlorinated (o-xylene) solvents for the deposition of the active layer. The use of o-xylene allows a similar to 10% improvement of the device efficiency in comparison to the analogous system processed from o-dichlorobenzene. In addition, the evolution of the photovoltaic parameters of the resulting devices during thermal stress is monitored and compared, demonstrating a nearly identical resistance against temperature. The reported results not only highlight the promising properties of the new polymer in terms of environmental stability and compatibility with nonhalogenated solvents, but also show an easy and ecofriendly way to further improve the device performance without altering the corresponding thermal stability.



thermal stability

photovoltaic properties

donor polymer

nonchlorinated processing solvent



BHJ solar cells


open-circuit voltage

Polymer Science

conjugated polymers



Mirko Seri

Consiglio Nazionale delle Ricerche

Desta Antenehe Gedefaw

University of South Australia

M. Prosa

Consiglio Nazionale delle Ricerche

Marta Tessarolo

Consiglio Nazionale delle Ricerche

Margherita Bolognesi

Laboratory MIST E-R

Michele Muccini

Consiglio Nazionale delle Ricerche

Mats Andersson

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

Journal of Polymer Science, Part A: Polymer Chemistry

0887-624X (ISSN) 1099-0518 (eISSN)

Vol. 55 234-242


Textil-, gummi- och polymermaterial


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