Polymer solar cells with enhanced lifetime by improved electrode stability and sealing

Roesch, Roland; Eberhardt, K.-R.; Engmann, Sebastian; Gobsch, G.; Hoppe, Harald

doi:10.1016/j.solmat.2013.05.013

Cited by 96 publications

(91 citation statements)

References 36 publications

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“…[26][27][28] Although such a procedure can give a hint towards the potential lifetime of the sample, extrapolation is often very inaccurate and cannot be used reliably in a scientifi c report, especially when it is extended to more than once or twice the duration of the actual measurements. [ 25 ] Moreover, there are often failure mechanisms that do not appear at the initial stage of OPV degradation, but cause a sudden acceleration of degradation at a later stage.…”

Section: Lifetime Markermentioning

confidence: 99%

See 1 more Smart Citation

Lifetime of Organic Photovoltaics: Status and Predictions

Gevorgyan

Madsen

Roth

et al. 2015

Advanced Energy Materials

130

124

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performance level, especially when considering large-scale mass-produced modules, is predicted to be signifi cantly lower. [ 8 ] Nevertheless, based on recent advances in the upscaling of OPV manufacture [9][10][11][12] it is reasonable to assume that the mass production of modules with an effi ciency of more than 5% is an achievable target today. Durability of OPV is however yet to be proven and demonstrated.Due to core architectural differences between OPV and inorganic technologies [ 13 ] the established testing standards of the latter are not applicable to the former. [ 1 ] Hence, for many years the stability testing of OPV has primarily been based on customized procedures that vary from one laboratory to another, generating incomparable data. [ 14 ] Moreover, due to the complexity of the OPV device architectures [ 15 ] and a multitude of aging mechanisms taking place at the same time [ 16 ] the aging curve of OPV often takes a complex shape, which is diffi cult to model, [ 14,17 ] thus making the identifi cation of a practical operational lifetime diffi cult or impossible. [ 18 ] As a result, even with a multitude of reported review articles discussing OPV stability [ 16,[19][20][21][22][23][24] at hand, it is still challenging to identify where the technology stands in terms of lifetime. To address this it is necessary to create a yardstick -a generic marker that allows accurate rating and comparison of the lifetime for OPV, and thus enabling the gauging of progress over time. An additional complication that has arisen due to the signifi cant improvements in OPV stability and durability in recent years is that the determination of OPV lifetimes has become an impractically long process, and establishing markers for both accelerated and real operational test conditions (if successful) would allow developing a prediction tool that could speed up the stability testing process and tackle this issue.The groundwork towards creating such a marker was laid in 2011 at the International Summit on OPV Stability (ISOS) where the ISOS testing guidelines were decided upon and described for OPV technologies. [ 18 ] These guidelines were primarily aimed at harmonizing testing procedures among different laboratories by offering a set of indoor and outdoor tests with controlled conditions. This has helped to reduce variations in the reported results, making the aging studies of different laboratories more comparable. [ 25 ] While the ISOS tests harmonized the test conditions, the questions of how to generically determine the lifetime from aging curves of diverse shapes, and how to build a technique for predicting the lifetime based on accelerated tests remained.The results of a meta-analysis conducted on organic photovoltaics (OPV) lifetime data reported in the literature is presented through the compilation of an extensive OPV lifetime database based on a large number of articles, followed by analysis of the large body of data. We fully reveal the progress of reported OPV lifetimes. Furthermore, a generic lifetime marker has...

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Section: Lifetime Markermentioning

confidence: 99%

“…Conditions Description PCDTBT [27,28,[74][75][76][77] Light, dark poly[N-9″-hepta-decanyl-2,7-carbazole-alt-5,5-(4′,7′-di-2-thienyl-2′,1′,3′-benzothiadiazole)…”

Section: Namementioning

confidence: 99%

Lifetime of Organic Photovoltaics: Status and Predictions

Gevorgyan

Madsen

Roth

et al. 2015

Advanced Energy Materials

130

124

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“…[3][4][5] Recent investigations on several high performing materials for organic solar cells showed severe efficiency losses of up to 25% during the initial phase of operation. [6][7][8][9] For electronic devices with fast initial failure, a burnin 10 step is oen performed by the manufacturer to provide a more reliable product to the customer. Referring to this practice, the initial degradation in OPV devices has been termed a "burn-in" 7 period.…”

Section: Introductionmentioning

confidence: 99%

Reducing burn-in voltage loss in polymer solar cells by increasing the polymer crystallinity

Heumueller

Mateker

Sachs-Quintana

et al. 2014

Energy Environ. Sci.

165

183

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“…Solar cells based on organic conjugated polymers have various potential advantages, such as, light weight, ease of fabrication and low-cost devices, thus, may be commercially attractive [1][2][3]. In order to be commercially competitive, various issues must be first be addressed, including improvement in stability and conversion [4,5].…”

Section: Introductionmentioning

confidence: 99%

Computational Study on Optoelectronic Property Tuning of Oligothiophenes via Chemical Modifications for Solar Cell Applications

Franco¹

2018

Asian J. Chem.

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Chemical modifications in conjugated polymers offers the possibility of tuning its optoelectronic properties for various applications. In this report, the optoelectronic properties of chemically modified oligomers based on poly(3-hexylthiophene-2,5-diyl) (P3HT) were investigated via DFT and TDDFT. The study was carried out by replacing the hydrogen in the 3'-position of the bithiophene monomer unit with several substituents. The polymer properties were predicted via oligomer approach where n, was varied from 1 to 10. Various electronic and optical properties were calculated: EHOMO, ELUMO, EGap, first singlet excitation energy (EOpt) and exciton binding energy (EB). Several substituents: -CN and -F were observed to have significantly lower EHOMO/ELUMO values while having similar EGap compared to P3HT. Relevant solar cell characteristics were predicted and show that P3HT-CN and P3HT-F have significantly improved open-circuit voltage (VOC). The results suggest that P3HT-CN and P3HT-F may have overall better solar cell characteristics than P3HT.

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Polymer solar cells with enhanced lifetime by improved electrode stability and sealing

Cited by 96 publications

References 36 publications

Lifetime of Organic Photovoltaics: Status and Predictions

Lifetime of Organic Photovoltaics: Status and Predictions

Reducing burn-in voltage loss in polymer solar cells by increasing the polymer crystallinity

Computational Study on Optoelectronic Property Tuning of Oligothiophenes via Chemical Modifications for Solar Cell Applications

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