Performance, morphology and photophysics of high open-circuit voltage, low band gap all-polymer solar cells
dc.contributor.author | Deshmukh, K. | |
dc.contributor.author | Qin, T. | |
dc.contributor.author | Gallaher, J. | |
dc.contributor.author | Liu, A. | |
dc.contributor.author | Gann, E. | |
dc.contributor.author | O'Donnell, Kane | |
dc.contributor.author | Thomsen, L. | |
dc.contributor.author | Hodgkiss, J. | |
dc.contributor.author | Watkins, S. | |
dc.contributor.author | McNeill, C. | |
dc.date.accessioned | 2017-01-30T15:10:35Z | |
dc.date.available | 2017-01-30T15:10:35Z | |
dc.date.created | 2015-10-29T04:09:18Z | |
dc.date.issued | 2015 | |
dc.identifier.citation | Deshmukh, K. and Qin, T. and Gallaher, J. and Liu, A. and Gann, E. and O'Donnell, K. and Thomsen, L. et al. 2015. Performance, morphology and photophysics of high open-circuit voltage, low band gap all-polymer solar cells. Energy and Environmental Science. 8 (1): pp. 332-342. | |
dc.identifier.uri | http://hdl.handle.net/20.500.11937/43844 | |
dc.identifier.doi | 10.1039/c4ee03059a | |
dc.description.abstract |
The microstructure and photophysics of low-band gap, all-polymer photovoltaic blends are presented. Blends are based on the donor polymer BFS4 (a dithienyl-benzo[1,2-b:4,5-b]dithiophene/5-fluoro-2,1,3-benzothiadiazole co-polymer) paired with the naphthalene diimide-based acceptor polymer P(NDI2OD-T2). Efficiencies of over 4% are demonstrated, with an open circuit voltage of greater than 0.9 V achieved. Transmission electron microscopy reveals a relatively coarse phase-separated morphology, with elongated domains up to 200 nm in width. Near-edge X-ray absorption fine-structure (NEXAFS) spectroscopy and atomic force microscopy (AFM) measurements reveal that the top surface of BFS4:P(NDI2OD-T2) blends is covered with a pure BFS4 capping layer. Depth profiling measurements confirm this vertical phase separation with a surface-directed spinodal decomposition wave observed. Grazing-incidence wide-angle X-ray scattering (GIWAXS) measurements confirm that BFS4 and P(NDI2OD-T2) are semicrystalline with both polymers retaining their semicrystalline nature when blended. Photoluminescence spectroscopy reveals incomplete photoluminescence quenching with as much as 30% of excitons failing to reach a donor/acceptor interface. Transient absorption spectroscopy measurements also find evidence for rapid geminate recombination. | |
dc.publisher | Royal Society of Chemistry | |
dc.title | Performance, morphology and photophysics of high open-circuit voltage, low band gap all-polymer solar cells | |
dc.type | Journal Article | |
dcterms.source.volume | 8 | |
dcterms.source.number | 1 | |
dcterms.source.startPage | 332 | |
dcterms.source.endPage | 342 | |
dcterms.source.issn | 1754-5692 | |
dcterms.source.title | Energy and Environmental Science | |
curtin.department | Department of Physics and Astronomy | |
curtin.accessStatus | Fulltext not available |
Files in this item
Files | Size | Format | View |
---|---|---|---|
There are no files associated with this item. |