Efficient, large area, and thick junction polymer solar cells with balanced mobilities and low defect densities

Armin, Ardalan, Hambsch, Mike, Wolfer, Pascal, Jin, Hui, Li, Jun, Shi, Zugui, Burn, Paul L. and Meredith, Paul (2015) Efficient, large area, and thick junction polymer solar cells with balanced mobilities and low defect densities. Advanced Energy Materials, 5 3: 1-7. doi:10.1002/aenm.201401221


Author Armin, Ardalan
Hambsch, Mike
Wolfer, Pascal
Jin, Hui
Li, Jun
Shi, Zugui
Burn, Paul L.
Meredith, Paul
Title Efficient, large area, and thick junction polymer solar cells with balanced mobilities and low defect densities
Journal name Advanced Energy Materials   Check publisher's open access policy
ISSN 1614-6840
1614-6832
Publication date 2015-02-01
Year available 2014
Sub-type Article (original research)
DOI 10.1002/aenm.201401221
Volume 5
Issue 3
Start page 1
End page 7
Total pages 7
Place of publication Weinheim, Germany
Publisher Wiley-VCH Verlag
Collection year 2015
Language eng
Formatted abstract
The high power conversion efficiencies (PCEs) of laboratory-scale polymer-based organic solar cells are yet to translate to large area modules because of a number of factors including the relatively large sheet resistance of available transparent conducting electrodes (TCEs), and the high defect densities associated with thin organic semiconductor junctions. The TCE problem limits device architectures to narrow connected strips (<1 cm) causing serious fabrication difficulties and extra costs. Thin junctions are required because of poor charge transport (imbalanced mobilities) in the constituent organic semiconductors. These issues are addressed using a combination of approaches to create thick junctions conformally coated on low sheet resistance metal grid TCEs. An essential feature of these thick junctions is balanced carrier mobilities, which affords high fill factors and efficient carrier extraction. Conformal coating is achieved by promoting enhanced intermolecular interactions in the coating solution using a high molecular weight polymeric semiconductor and appropriate solvent system. This combination of balanced mobilities, conformal coating and metallic grid TCEs is a simple and generic approach to the fabrication of defect-free large area organic solar cells (OSCs). The approach is demonstrated with 25 cm2 monolithic devices possessing aperture-corrected power conversion efficiencies of 5% and fill factors exceeding 0.5.
Keyword Organic solar cells
Charge carrier mobility
Thick organic junctions
Transparent conductive electrodes
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online ahead of print 29 Sep 2014

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2015 Collection
School of Chemistry and Molecular Biosciences
 
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