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Title: | Design and synthesis of side-chain functionalized regioregular poly(3-hexylthiophene)-based copolymers and application in polymer:fullerene bulk heterojunction solar cells | Authors: | CAMPO, Bert OOSTERBAAN, Wibren Gilot, J. CLEIJ, Thomas LUTSEN, Laurence Janssen, R.A.J. VANDERZANDE, Dirk |
Issue Date: | 2009 | Publisher: | SPIE | Source: | Kafafi, Zakya H. & Lane, Paul A. (Ed.)ORGANIC PHOTOVOLTAICS X, (Art N° 74161G) | Series/Report: | Proceedings of SPIE | Series/Report no.: | 7416 | Abstract: | set of novel regioregular poly(3-hexylthiophene)-based random copolymers containing varying ratios of ester functionalized alkyl side chains were synthesized using the Rieke method. The percentage of functionalized side chain varied between 10 and 50 mol% for each copolymer. Using post-polymerization reactions, the ester functions in the alkyl side chain were hydrolyzed to yield an alcohol or acid group. These groups are available for further functionalization reactions, so a wide variety of secondary functionalities may be covalently attached to the conjugated polymer. The copolymers were applied in polymer: fullerene bulk heterojunction solar cells (BHJSCs) with [6,6]-phenyl -C61-butyric acid methyl ester (PCBM) as electron acceptor. The influence of side-chain functionalities on absorption, device performance and layer morphology depends on the ratio and nature of the functionalized side chains. For a 9/1 copolymer, containing 10% of functionalized side chains, behaviour and efficiency in BHJSCs comparable to P3HT:PCBM solar cells were observed. | Keywords: | functionalized polythiophenes; post-polymerization functionalization; bulk heterojunction solar cells; morphology; stability | Document URI: | http://hdl.handle.net/1942/10905 | ISBN: | 9780819477064 | DOI: | 10.1117/12.825881 | ISI #: | 000307649100018 | Rights: | © 2009 SPIE | Category: | C1 | Type: | Proceedings Paper | Validations: | ecoom 2014 |
Appears in Collections: | Research publications |
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