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Semi-transparent tandem organic solar cells with 90% internal quantum efficiency

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dc.contributor.authorTang, Z.
dc.contributor.authorGeorge, Z.
dc.contributor.authorMa, Z.
dc.contributor.authorBergqvist, J.
dc.contributor.authorTvingstedt, K.
dc.contributor.authorVandewal, K.
dc.contributor.authorWang, E.
dc.contributor.authorAndersson, L.M.
dc.contributor.authorAndersson, M.R.
dc.contributor.authorZhang, F.
dc.contributor.authorInganas, O.
dc.date.issued2012
dc.description.abstractSemi-transparent (ST) organic solar cells with potential application as power generating windows are studied. The main challenge is to find proper transparent electrodes with desired electrical and optical properties. In this work, this is addressed by employing an amphiphilic conjugated polymer PFPA-1 modified ITO coated glass substrate as the ohmic electron-collecting cathode and PEDOT:PSS PH1000 as the hole-collecting anode. For active layers based on different donor polymers, considerably lower reflection and parasitic absorption are found in the ST solar cells as compared to solar cells in the standard geometry with an ITO/PEDOT:PSS anode and a LiF/Al cathode. The ST solar cells have remarkably high internal quantum efficiency at short circuit condition ( ∼ 90%) and high transmittance ( ∼ 50%). Hence, efficient ST tandem solar cells with enhanced power conversion efficiency ( PCE ) compared to a single ST solar cell can be constructed by connecting the stacked two ST subcells in parallel. The total loss of photons by reflection, parasitic absorption and transmission in the ST tandem solar cell can be smaller than the loss in a standard solar cell based on the same active materials. We demonstrate this by stacking fi ve separately prepared ST cells on top of each other, to obtain a higher photocurrent than in an optimized standard solar cell.
dc.identifier.citationAdvanced Energy Materials, 2012; 2(12):1467-1476
dc.identifier.doi10.1002/aenm.201200204
dc.identifier.issn1614-6832
dc.identifier.issn1614-6840
dc.identifier.urihttps://hdl.handle.net/1959.8/154455
dc.language.isoen
dc.publisherWiley
dc.relation.fundingSwedish Energy Agency
dc.relation.fundingSwedish Research Council
dc.relation.fundingAdvanced Functional Materials initiative at Linköping University
dc.relation.fundingKnut and Alice Wallenberg Foundation (KAW)
dc.relation.fundingKAW
dc.relation.fundingVINNOVA
dc.rightsCopyright 2012 Wiley
dc.source.urihttps://doi.org/10.1002/aenm.201200204
dc.subjectpolymer solar cells
dc.subjectsemi-transparent solar cells
dc.subjectinterface
dc.subjectconjugated polymers
dc.subjecttandem solar cells
dc.titleSemi-transparent tandem organic solar cells with 90% internal quantum efficiency
dc.typeJournal article
pubs.publication-statusPublished
ror.mmsid9915909574901831

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