Photon recycling across a ultraviolet-blocking layer by luminescence in polymer solar cells

Engmann, Sebastian; Machalett, Marie; Turkovic, Vida; Rösch, Roland; Rädlein, Edda; Gobsch, G.; Hoppe, Harald

doi:10.1063/1.4745016

Cited by 26 publications

(30 citation statements)

References 9 publications

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“…[180] shelf lifetime 94 6000 pentacene:PCBM Al 2 O 3 film [181] shelf lifetime 80 500 P3HT:PCBM commercial barrier foil [53] outdoor 40 1000 P3HT:PCBM polyurethane [186] outdoor 40 over 3000 inverted P3HT:PCBM inorganic/organic [22] shelf lifetime 50 6000 P3HT:PCBM glass sheet [207] illumination 96 120 inverted P3HT:PCBM glass sheet [26] illumination 50 5000 P3HT:PCBM glass sheet [129] illumination 80 4000 PCDTBT/PC 70 BM and P3HT:PCBM PET with side protection [210] illumination almost 100 800 P3HT:PCBM glass sheet [149] illumination over 50 4700 inverted P3HT:PCBM glass sheet [208] illumination www.chemphyschem.org These encapsulationt echniques have led to the development of OPV devices with increased stability and lifetime.…”

Section: Discussionmentioning

confidence: 99%

“…UV-blocking layers can increase the long-term stabilityo fo rganic solar-cell devices by filtering out UV radiation. [180] In the same work, al uminescent layer was also inserted on top of the UV-blocking layer to enablep hoton recycling, which thusenhanced devicep erformance. [179] In P3HT:PCBM devices with an ormala rchitecture, TiO 2 -SiO x layers have been successfully used to block UV radiation.…”

Section: Low-cost Encapsulationmentioning

confidence: 99%

“…[179] In P3HT:PCBM devices with an ormala rchitecture, TiO 2 -SiO x layers have been successfully used to block UV radiation. [180] In the same work, al uminescent layer was also inserted on top of the UV-blocking layer to enablep hoton recycling, which thusenhanced devicep erformance.…”

Section: Low-cost Encapsulationmentioning

confidence: 99%

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Methods for Improving the Lifetime Performance of Organic Photovoltaics with Low‐Costing Encapsulation

et al. 2015

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Recent years have seen considerable advances in organic photovoltaics (OPVs), most notably a significant increase in their efficiency, from around 4 % to over 10 %. The stability of these devices, however, continues to remain an issue that needs to be resolved to enable their commercialization. This review discusses the main degradation processes of OPVs and recent methods that help to increase device stability and lifetime. One of the most effective steps that can be taken to increase the lifetime of OPVs is their encapsulation, which protects them from atmospheric degradation. Efficient encapsulation is essential for long-term device performance, but it is equally important for the commercialization of OPVs to strike a balance between achieving the maximum device protection possible and using low-cost processing for their encapsulation. Various encapsulation techniques are discussed herein, with emphasis on their cost effectiveness and their overall suitability for commercial applications.

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Section: Discussionmentioning

confidence: 99%

Section: Low-cost Encapsulationmentioning

confidence: 99%

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Methods for Improving the Lifetime Performance of Organic Photovoltaics with Low‐Costing Encapsulation

et al. 2015

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“…The organic nature of the constituent layers make the OPV devices very sensitive to photooxidation, which takes place upon UV radiation and ingress of oxygen and water into the solar cell device [2,3]. In order to overcome this problem, different approaches are being investigated: development of intrinsically more photochemically stable materials [4][5][6], optimization of encapsulation [7][8][9], and implementation of getter materials and oxygen, humidity [2,10,11], and UV blocking layers [12][13][14]. In this study, we discuss the possibilities of stabilizing OPV devices using small molecule materials as stabilizing additives and compare the working mechanisms of different classes of commercially available materials.…”

Section: Introductionmentioning

confidence: 99%

Long-term stabilization of organic solar cells using hydroperoxide decomposers as additives

et al. 2016

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Stability of organic solar cells (OPV) remains a big problem on the way to their commercialization. Different approaches are being investigated: development of intrinsically more photochemically stable materials, optimization of encapsulation, and implementation of getter and UV blocking layers. In this study, we investigate stabilization of OPV devices using hydroperoxide decomposers as stabilizing additives. A set of five commercially available additives of organophosphorus, organosulfur, Ni chelate, and blocked thiol type are compared, ternary blended into the active layer, under exposure to aging under ISOS-3 degradation conditions. Improvements in long-term performance of OPV devices were observed upon stabilization with Advapak NEO-1120, lifetime was prolonged by a factor of 1.7, and accumulated power generation increased by a factor of 1.4. The stabilizing mechanisms are discussed using spectroscopic and microscopic measurements.

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“…Whilst the potential for efficiency and stability enhancements via LDS layers have been reported in a wide range of PV technologies, including Dye Sensitised Solar Cells (DSSCs) [9], there are only a limited number of studies that have been carried out on OPV materials [10] and devices [11,12,13]. In particular, Sloff et al and Engmann et al have reported promising results that show a photocurrent improvement by applying LDS layers in OPVs, but the stability issue was not addressed.…”

Section: Introductionmentioning

confidence: 99%

Printable luminescent down shifter for enhancing efficiency and stability of organic photovoltaics

Kettle

Bristow

Gethin

et al. 2016

Solar Energy Materials and Solar Cells

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The proof of concept of using luminescent down shifting (LDS) layers as alternative UV filters for P3HT:PCBM OPVs is demonstrated using a lanthanide-based metal complex. The results are verified using a combination of indoor light soaking, with single cell devices, and outdoor performance monitoring, using a 16-cell monolithically connected OPV module. By applying the LDS layer, a ~5% relative enhancement in photocurrent is observed for both sets of devices. More significantly, indoor light soaking tests on single cell devices without encapsulation showed an 850% enhancement in the measured half-life (T50%). The OPV modules were encapsulated and tested for outdoor stability over a 70 day period in the Negev desert, Israel . The modules made with the LDS filter are shown to match the stability of those made with a commercial UV filter and outperform the modules with no filter applied, with a 51% enhancement in the measured stability (T75%). Significantly, the work provides clear experimental evidence that the LDS layer can act as a UV filter in OPVs without compromising the efficiency of the solar cell, thus providing an added benefit over commercial UV filters.

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Photon recycling across a ultraviolet-blocking layer by luminescence in polymer solar cells

Cited by 26 publications

References 9 publications

Methods for Improving the Lifetime Performance of Organic Photovoltaics with Low‐Costing Encapsulation

Methods for Improving the Lifetime Performance of Organic Photovoltaics with Low‐Costing Encapsulation

Long-term stabilization of organic solar cells using hydroperoxide decomposers as additives

Printable luminescent down shifter for enhancing efficiency and stability of organic photovoltaics

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