Wavelength influence on the photodegradation of P3HT:PCBM organic solar cells

Corcoles, Laura; Abad, José Antonio; Padilla, Javier; Urbina, Antonio

doi:10.1016/j.solmat.2015.06.023

Cited by 33 publications

(19 citation statements)

References 45 publications

(50 reference statements)

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“…Recently, many studies have focused on the photostability of OSCs based on the different light spectrum and ultraviolet (UV) light‐induced instability has attracted many research attentions. [ 65–67 ] Photo‐degradation of OSCs was found more sensitive to the light at blue and UV wavelength range. [ 65,68 ] UV photons are the most energetic in the light spectrum.…”

Section: Mechanisms Behind Degradation/instabilitymentioning

confidence: 99%

“…[ 65–67 ] Photo‐degradation of OSCs was found more sensitive to the light at blue and UV wavelength range. [ 65,68 ] UV photons are the most energetic in the light spectrum. Nevertheless, they have less contribution to the energy conversion process in OSCs due to the absorption spectrum limitation of most of the organic materials.…”

Section: Mechanisms Behind Degradation/instabilitymentioning

confidence: 99%

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Progress in Stability of Organic Solar Cells

2020

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The organic solar cell (OSC) is a promising emerging low‐cost thin film photovoltaics technology. The power conversion efficiency (PCE) of OSCs has overpassed 16% for single junction and 17% for organic–organic tandem solar cells with the development of low bandgap organic materials synthesis and device processing technology. The main barrier of commercial use of OSCs is the poor stability of devices. Herein, the factors limiting the stability of OSCs are summarized. The limiting stability factors are oxygen, water, irradiation, heating, metastable morphology, diffusion of electrodes and buffer layers materials, and mechanical stress. The recent progress in strategies to increase the stability of OSCs is surveyed, such as material design, device engineering of active layers, employing inverted geometry, optimizing buffer layers, using stable electrodes and encapsulation materials. The International Summit on Organic Photovoltaic Stability guidelines are also discussed. The potential research strategies to achieve the required device stability and efficiency are highlighted, rendering possible pathways to facilitate the viable commercialization of OSCs.

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Section: Mechanisms Behind Degradation/instabilitymentioning

confidence: 99%

Section: Mechanisms Behind Degradation/instabilitymentioning

confidence: 99%

Progress in Stability of Organic Solar Cells

2020

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“…Many factors limit the stability of OSCs such as: metastable morphology and heating, [32] oxygen and water, [33] and irradiation. [34,35] Indeed, the degradation of π-conjugated molecules is a bottleneck impeding their application in OPV devices. [36] The use of these molecules as device materials in OPV technologies therefore requires the development of an innovative technique that can overcome this degradation problem.…”

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confidence: 99%

Encapsulation effect of π‐conjugated quaterthiophene on the radial breathing and tangential modes of semiconducting and metallic single‐walled carbon nanotubes

et al. 2020

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We developed a hybrid approach, combining the density functional theory, molecular mechanics, bond polarizability model and the spectral moment's method to compute the nonresonant Raman spectra of a single quaterthiophene (4T) molecule encapsulated into a single-walled carbon nanotube (metallic or semiconducting). We reported the optimal tube diameter allowing the 4T encapsulation. The influence of the encapsulation on the Raman modes of the 4T molecule and those of the nanotube (radial breathing modes and tangential modes) are analyzed. An eventual charge transfer between the 4T oligomer and the nanotube is discussed.

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“…[36,37] Finally, it was shown that the degradation behavior can be affected by various factors: whether the polymer is in solution or in the solid state and in the latter case the degree of crystallinity, as well as the ambient humidity and the wavelength of the incident radiation. [26,32,[38][39][40][41] Here, we report a detailed investigation of the photodegradation in FBR and P3HT, and their blends. The kinetics are initially monitored via the optical absorption and emission properties, providing evidence that in the blend films the degradation of each component is strongly influenced by the partner material.…”

Section: •−mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Interplay of Stability between Donor and Acceptor Materials in a Fullerene‐Free Bulk Heterojunction Solar Cell Blend

Sudakov

Landeghem

Lenaerts

et al. 2020

Advanced Energy Materials

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With rapid advances in material synthesis and device performance, the long‐term stability of organic solar cells has become the main remaining challenge toward commercialization. An investigation of photodegradation in blend films of the donor polymer poly(3‐hexylthiophene) (P3HT) and the rhodanine‐flanked small molecule acceptor 5,5′‐[(9,9‐dioctyl‐9H‐fluorene‐2,7‐diyl)bis(2,1,3‐benzothiadiazole‐7,4‐diylmethylidyne)]bis[3‐ethyl‐2‐thioxo‐4‐thiazolidinone] (FBR) is presented in an ambient atmosphere. The photobleaching kinetics of the pure materials and their blends is correlated with the generation of radicals and triplet excitons using optical and magnetic resonance techniques. In addition, spin‐trapping methods are employed to identify reactive oxygen species (ROS). In films of P3HT, FBR, and the P3HT:FBR blend, superoxide is generated by electron transfer to molecular oxygen. However, it is found that the generation of singlet oxygen by energy transfer from the FBR triplet state is responsible for the poor stability of FBR and for the accelerated photodegradation at later times of the P3HT:FBR blend. In the early stage of degradation of the neat blend, it is protected from singlet oxygen by the fast donor–acceptor charge transfer, which competes with triplet exciton formation. These results provide initial input for a rational design of donor and acceptor materials through tuning the molecular singlet and triplet energy levels to prevent ROS‐related photodegradation.

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Wavelength influence on the photodegradation of P3HT:PCBM organic solar cells

Cited by 33 publications

References 45 publications

Progress in Stability of Organic Solar Cells

Progress in Stability of Organic Solar Cells

Encapsulation effect of π‐conjugated quaterthiophene on the radial breathing and tangential modes of semiconducting and metallic single‐walled carbon nanotubes

The Interplay of Stability between Donor and Acceptor Materials in a Fullerene‐Free Bulk Heterojunction Solar Cell Blend

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