Please use this identifier to cite or link to this item:
Title: Thermally Stable Bulk Heterojunction Solar Cells Based on Cross-Linkable Acrylate-Functionalized Polythiophene Diblock Copolymers
Authors: Ouhib, Farid
Tomassetti, Mirco
Manca, Jean 
Piersimoni, Fortunato 
Spoltore, Donato 
Bertho, Sabine 
Moons, Hans 
Lazzaroni, Roberto
Desbief, Simon
Jerome, Christine
Detrembleur, Christophe
Issue Date: 2013
Source: MACROMOLECULES, 46 (3), p. 785-795
Abstract: We report on the synthesis of new thermally cross-linkable all-conjugated diblock copolymers composed of a poly(3-hexylthiophene) (P3HT) block and an acrylate-functionalized polythiophene block. These copolymers are then used in bulk heterojunction (BHJ) solar cells with [6,6]-phenyl C61-butyric acid methyl ester (PCBM), and their photovoltaic performances are compared with standard P3HT/PCBM devices. Thermal cross-linking of the functional copolymers/PCBM blends is performed to improve the thermal stability of the active layer. BHJ photovoltaic cells with cross-linkable copolymers and PCBM show initial power conversion efficiencies slightly lower than that of P3HT devices. However, solar cells with cross-linkable copolymers retain more than 85% of their initial power efficiency value after 165 h of thermal annealing (accelerated aging test), whereas the same devices with P3HT retain less than 65% of their initial power efficiency. This improvement of the thermal stability of BHJ photovoltaic cells is the result of the polymer network that hampers PCBM diffusion and phase separation, as confirmed with TEM and AFM analysis of the microscopic morphology. Such an improvement is mostly observed when using a cross-linkable P3HT with a short spacer between the acrylate group and the polythiophene backbone.
Notes: [Ouhib, Farid; Jerome, Christine; Detrembleur, Christophe] Univ Liege ULg, Dept Chem, CERM, B-4000 Liege, Belgium. [Tomassetti, Mirco; Manca, Jean; Piersimoni, Fortunato; Spoltore, Donato; Bertho, Sabine; Moons, Hans] Univ Hasselt, IMO, Div IMOMEC, B-3590 Diepenbeek, Belgium. [Lazzaroni, Roberto; Desbief, Simon] Univ Mons UMONS, Serv Chim Mat Nouveaux, B-7000 Mons, Belgium.
Keywords: Polymer Science
Document URI:
ISSN: 0024-9297
e-ISSN: 1520-5835
DOI: 10.1021/ma3020905
ISI #: 000315018400026
Category: A1
Type: Journal Contribution
Validations: ecoom 2014
Appears in Collections:Research publications

Show full item record


checked on Sep 3, 2020


checked on May 13, 2022

Page view(s)

checked on May 18, 2022

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.