Aging and Degradation of Organic Solar Cells Using QUV Accelerated-Weathering Tester

Djeddaoui, Naas; Boukezzi, Larbi; Bessissa, Lakhdar

doi:10.1007/s42341-019-00103-z

Cited by 5 publications

(3 citation statements)

References 42 publications

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“…For the ISOS-LT-1 test (Figures 3C,D), a single exponential behavior is observed for both encapsulations. This same behavior points out to temperature as the main degradation mechanism (Schuller et al, 2004;Gevorgyan et al, 2008;Djeddaoui et al, 2019).…”

Section: Isos-t-3supporting

confidence: 60%

“…For J SC , a biexponential fit for plastic and a single exponential fit for glass (Figure 4C) is used for this system, showing, in this case, two different mechanisms. According to the literature (Schuller et al, 2004;Gevorgyan et al, 2008;Djeddaoui et al, 2019), these two mechanisms are closely linked to temperature and humidity. The plastic-encapsulated device shows a better stability than the glass-encapsulated device, reaching up to 700 h. This behavior seems to indicate that the plastic encapsulation provides better isolation from ambient conditions (less oxygen and moisture ingress into the device), better thermal cycling (from −40 to 85 °C), and mainly a superior manipulation resilience.…”

Section: Isos-t-3mentioning

confidence: 99%

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Lifetime Study of Organic Solar Cells with O-IDTBR as Non-Fullerene Acceptor

et al. 2021

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Organic solar cells (OSCs) have increased their power conversion efficiency above 18% thanks to the use of non-fullerene acceptors in binary or ternary blends or in tandem configurations. In this article, a study on the lifetime of P3HT:O-IDTBR bulk heterojunction OSCs on ITO-free flexible substrates is presented. A direct comparison of glass–glass and plastic–plastic encapsulation performance, with a special focus on its effect on the lifetime of the devices after degradation procedures, has been carried out complying with the ISOS protocols for organic photovoltaic devices. The manufactured OSCs with 1 cm2 active layer have power conversion efficiencies ranging from 1.9 to 3.4% depending on the encapsulant material, encapsulation process, and substrate. An exponential degradation rate has been found, with a similar functional behavior for glass and plastic differing in the degradation constants, which ranges from k = 0.01 to 0.002 h−1. Only in one case, the ISOS-T3 essay for plastic encapsulation, a double exponential process, was observed with degradation rates of k1 = 0.03 h−1 and a second slower process with k2 = 0.001 h−1. The longest achieved T80 lifetime is 86 h for glass-encapsulated devices under an accelerated ISOS-T3 protocol.

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Section: Isos-t-3supporting

confidence: 60%

Section: Isos-t-3mentioning

confidence: 99%

Lifetime Study of Organic Solar Cells with O-IDTBR as Non-Fullerene Acceptor

et al. 2021

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“…We broadened the range of the used X blocks by including diketopyrrolopyrrole (DPP) coupled with thiophene or phenylene units, isoindigo, dialkoxy-or difluorophenylene, and benzodithiophenedione, which are widely used in the design of efficient electron donor conjugated polymers. [44][45][46] The experiment aimed to simulate the stress conditions which are experienced by organic solar cells during their encapsulation in air followed by their exposure to light under the operational conditions (Figure 5b). To achieve this, the thin films of the conjugated polymers were first annealed in the dark in the ambient atmosphere at 130 °C within 2 h, which mimics the procedure of their lamination between the plastic barrier foils.…”

Section: Resultsmentioning

confidence: 99%

Resist or Oxidize: Identifying Molecular Structure–Photostability Relationships for Conjugated Polymers Used in Organic Solar Cells

2021

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Although organic solar cells have started to demonstrate competitive power conversion efficiencies of > 18 %, their operational lifetimes remain insufficient for wide practical use and the factors influencing the photostability of absorber materials and completed devices are still not completely understood. A systematic study of two series of structurally similar [XTBT] n and [XTTBTBTT] n polymers (16 structures in total) reveals the building blocks that enable the highest material stability towards photooxidation: fluorene, silafluorene, carbazole, diketopyrrolopyrrole, and isoindigo. Furthermore, a direct correlation is evident between the electronic properties of the conjugated polymers and their reactivity towards oxygen. The structures with the lowest highest occupied molecular orbital (HOMO) energies show the highest electrochemical oxidation potentials and appear to be the most resistant towards chemical oxidation. These relationships set important guidelines for the further rational design of new absorber materials for efficient and stable organic photovoltaics.

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A 3D finite element model of degradation phenomena in organic solar devices affected by oxidation

Sciuto

Coco

2020

Int J Energy Environ Eng

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Aging and Degradation of Organic Solar Cells Using QUV Accelerated-Weathering Tester

Cited by 5 publications

References 42 publications

Lifetime Study of Organic Solar Cells with O-IDTBR as Non-Fullerene Acceptor

Lifetime Study of Organic Solar Cells with O-IDTBR as Non-Fullerene Acceptor

Resist or Oxidize: Identifying Molecular Structure–Photostability Relationships for Conjugated Polymers Used in Organic Solar Cells

A 3D finite element model of degradation phenomena in organic solar devices affected by oxidation

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