- Title
- Non-dependence of polymer to PCBM weight ratio on the performance of bulk heterojunction solar cells with benzodithiophene donor polymer
- Creator
- Sista, Prakash; Wilson, Mitchell; Holmes, Natalie; Kularatne, Ruvini S.; Rainbolt, Elizabeth A.; Biewer, Michael C.; Dastoor, Paul C.; Belcher, Warwick; Stefan, Mihaela C.
- Relation
- Science of Advanced Materials Vol. 5, Issue 5, p. 512-518
- Publisher Link
- http://dx.doi.org/10.1166/sam.2013.1482
- Publisher
- American Scientific Publishers
- Resource Type
- journal article
- Date
- 2013
- Description
- A novel semiconducting polymer poly{4,8-bis(4-decylphenylethynyl)benzo[1,2-b:4,5-b′]dithiophene-alt-terthiophene} (P1) was synthesized by Stille coupling polymerization to yield a polymer with Mn = 24130 g/mol. The polymer was tested in bulk heterojunction solar cells with [6,6]-phenyl-C₆₁-butyric acid methyl ester (PCBM) acceptor at various weight ratios. This study showed that the power conversion efficiencies (PCE) remained independent of the weight ratio of polymer/PCBM ranging from 1:1 to 1:12. This independence was interpreted as an effect of the presence of low molecular weight oligomers and terthiophene monomer which acted as plasticizers in the solar cell devices. X-ray diffraction (XRD) and tapping mode atomic force microscopy (TMAFM) analysis were employed to investigate the morphology of the active layer blends.
- Subject
- benzodithiophene; bulk hetrojunction solar cell; morphology; PCBM; plasticizers
- Identifier
- http://hdl.handle.net/1959.13/1296975
- Identifier
- uon:19343
- Identifier
- ISSN:1947-2935
- Language
- eng
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