Baselines for Lifetime of Organic Solar Cells

Gevorgyan, Suren A.; Espinosa, Nieves; Ciammaruchi, Laura; Roth, Bérenger; Livi, Francesco; Tsopanidis, Stylianos; Züfle, Simon; Queirós, Sara; Gregori, Alberto; Benatto, Gisele Alves dos Reis; Corazza, Michael; Madsen, Morten Vesterager; Hösel, Markus; Beliatis, Michail J.; Larsen-Olsen, Thue Trofod; Pastorelli, Francesco; Castro, António; Mingorance, Alba; Lenzi, Veniero; Fluhr, Daniel; Roesch, Roland; Ramos, Marta M. D.; Savva, Achilleas; Hoppe, Harald; Marques, L.; Burgués, Ignasi; Georgiou, Efthymios; Serrano-Luján, Lucía; Krebs, Frederik C.

doi:10.1002/aenm.201600910

Cited by 46 publications

(42 citation statements)

References 52 publications

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“…Under white light stress, the PCE of a representative PffBT4T‐2OD:PC 71 BM‐based device, decreased up over 20% over 60 h, typical of light induced burn in losses reported for other OSC employing fullerene acceptors . In contrast, the PffBT4T‐2OD:EH‐IDTBR device shows essentially no light induced efficiency loss over this timescale, exhibiting a PCE of 9.5 ± 0.2% after 60 h under illumination indeed in some cases a modest increase in performance was observed, attributed to photoinduced doping of the ZnO layer . This difference in burn‐in response was tested for 18 devices, in all tests the PffBT4T‐2OD:EH‐IDTBR showed substantially less or negligible burn in efficiency loss compared to PffBT4T‐2OD:PC 71 BM devices (normalized PCE losses after 60 h of 0 ± 4% and −26 ± 8%, respectively).…”

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confidence: 62%

An Efficient, “Burn in” Free Organic Solar Cell Employing a Nonfullerene Electron Acceptor

et al. 2017

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A comparison of the efficiency, stability, and photophysics of organic solar cells employing poly[(5,6-difluoro-2,1,3-benzothiadiazol-4,7-diyl)-alt-(3,3'″-di(2-octyldodecyl)-2,2';5',2″;5″,2'″-quaterthiophen-5,5'″-diyl)] (PffBT4T-2OD) as a donor polymer blended with either the nonfullerene acceptor EH-IDTBR or the fullerene derivative, [6,6]-phenyl C butyric acid methyl ester (PC BM) as electron acceptors is reported. Inverted PffBT4T-2OD:EH-IDTBR blend solar cell fabricated without any processing additive achieves power conversion efficiencies (PCEs) of 9.5 ± 0.2%. The devices exhibit a high open circuit voltage of 1.08 ± 0.01 V, attributed to the high lowest unoccupied molecular orbital (LUMO) level of EH-IDTBR. Photoluminescence quenching and transient absorption data are employed to elucidate the ultrafast kinetics and efficiencies of charge separation in both blends, with PffBT4T-2OD exciton diffusion kinetics within polymer domains, and geminate recombination losses following exciton separation being identified as key factors determining the efficiency of photocurrent generation. Remarkably, while encapsulated PffBT4T-2OD:PC BM solar cells show significant efficiency loss under simulated solar irradiation ("burn in" degradation) due to the trap-assisted recombination through increased photoinduced trap states, PffBT4T-2OD:EH-IDTBR solar cell shows negligible burn in efficiency loss. Furthermore, PffBT4T-2OD:EH-IDTBR solar cells are found to be substantially more stable under 85 °C thermal stress than PffBT4T-2OD:PC BM devices.

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confidence: 62%

An Efficient, “Burn in” Free Organic Solar Cell Employing a Nonfullerene Electron Acceptor

et al. 2017

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“…Various published reports demonstrated extrapolated operational lifetimes of OPV for several years 4,5,7,8,11 . A recently published review 3,6,9 revealed an increase in publication activities on OPV stability research and an increase in average reported lifetimes over the recent years, clearly demonstrating progress in the field.…”

Section: Introductionmentioning

confidence: 99%

“…A recently published review 3,6,9 revealed an increase in publication activities on OPV stability research and an increase in average reported lifetimes over the recent years, clearly demonstrating progress in the field. The observed experimental lifetimes range up to 2 years 8,10 , when no extrapolations to T80 (corresponding to efficiency drop to 80% of the initial efficiency value) or TS,80 (corresponding to efficiency drop to 80% after stabilization) were considered 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Impact of P3HT materials properties and layer architecture on OPV device stability

Meitzner

Faber

Alam

et al. 2019

Solar Energy Materials and Solar Cells

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We report a cooperative study conducted between different laboratories to investigate organic solar cell degradation with respect to P3HT material properties and different solar cell architectures. Various batches of P3HT were collected from different suppliers reflecting commercial availability as well as properties variability. Among the materials properties explicitly considered were the molar mass, dispersity, regio-regularity, impurities by trace metals and intrinsic doping evaluated from radical concentrations. Each of the participating laboratories contributing test devices applied their own layer stack, i.e. their own device architecture and layout. This variation was appreciated as another parameter for evaluation. Even though a large amount of devices failed due to extrinsic degradation effects, indeed, some materials properties were found to be more important than others for obtaining long lifetimes and high stability of P3HT-based polymer solar cells.

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“…During the last few years, a lot of effort has been undertaken by the research community around those three pillars toward OPVs commercialization. OPVs with high PCEs and prolonged lifetime have been achieved . However, the combination of PCE, stability and low cost production is still challenging and essential for a feasible commercialization of this technology.…”

Section: Introductionmentioning

confidence: 99%

Printed Copper Nanoparticle Metal Grids for Cost‐Effective ITO‐Free Solution Processed Solar Cells

et al. 2018

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Copper nanoparticle inks have drawn much attention since they have the potential to constitute an alternative cost‐effective solution than other noble metals nanoparticle inks such as Ag for indium tin oxide (ITO)‐free printed electronic applications. Our research and development efforts have produced high conductivity copper nanoparticle inks which have excellent jetting and printing properties resulting in high quality inkjet‐printed (IJP) Cu nanoparticle‐based metal grids. We present ITO‐free, Si‐PCPDTBT: PC[70]BM organic photovoltaics (OPVs) processed in ambient low‐cost fabrication conditions comprising for the first time embedded and non embedded inkjet‐printed copper grid/Poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as the bottom electrode with power conversion efficiencies (PCE) of 2.56 and 3.35%, respectively. The results of the ITO‐free OPVs using inkjet‐printed Cu nanoparticle current collecting grids are discussed relevant to reference ITO‐based OPVs with PCE of 4.92%.

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Baselines for Lifetime of Organic Solar Cells

Cited by 46 publications

References 52 publications

An Efficient, “Burn in” Free Organic Solar Cell Employing a Nonfullerene Electron Acceptor

An Efficient, “Burn in” Free Organic Solar Cell Employing a Nonfullerene Electron Acceptor

Impact of P3HT materials properties and layer architecture on OPV device stability

Printed Copper Nanoparticle Metal Grids for Cost‐Effective ITO‐Free Solution Processed Solar Cells

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