Water-based solar cells over 10% efficiency: designing soft nanoparticles for improved processability

Holmes, Alexandre; Laval, Hugo; Guizzardi, Michele; Maruzzo, Valentina; Folpini, Giulia; Barbero, Nadia; Deniau, Elise; Schmutz, Marc; Blanc, Sylvie; Petrozza, Annamaria; Paternò, Giuseppe Maria; Wantz, Guillaume; Chambon, Sylvain; Lartigau-Dagron, Christine; Bousquet, Antoine

doi:10.1039/d3ee03744d

Cited by 4 publications

(1 citation statement)

References 51 publications

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“…To date, the best PCEs reported for fully water-processing OSCs with NPs from donor:acceptor blends are only around 10%, and they are limited by their inadequate microstructures and residual surfactant in the active layer. 24,25 Therefore, our recent trial attempted to combine water-processing with the LBL strategy for fabricating high-performance OSCs. 26 Here, we incorporated a water-processed mesostructured NP (mn) layer that allowed a thorough interdiffusion between the bottom and top layers during the solution-processing of the acceptor.…”

Section: Introductionmentioning

confidence: 99%

Water-based layer-by-layer processing enables 19% efficient binary organic solar cells with minimized thickness sensitivity

Xie,

Zeng,

et al. 2024

Energy Environ. Sci.

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Section: Introductionmentioning

confidence: 99%

Water-based layer-by-layer processing enables 19% efficient binary organic solar cells with minimized thickness sensitivity

Xie,

Zeng,

et al. 2024

Energy Environ. Sci.

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Organic Nano‐Junctions: Linking Nanomorphology and Charge Transport in Organic Semiconductor Nanoparticles for Organic Photovoltaic Devices

Laval,

Tian,

Lafranconi

et al. 2024

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In this study, innovative nanoscale devices are developed to investigate the charge transport in organic semiconductor nanoparticles. Using different steps of lithography techniques and dielectrophoresis, planar organic nano‐junctions are fabricated from which hole mobilities are extracted in a space charge‐limited current regime. Subsequently, these devices are used to investigate the impact of the composition and morphology of organic semiconductor nanoparticles on the charge mobilities. Pure donor nanoparticles and composite donor:acceptor nanoparticles with different donor compositions in their shell are inserted in the nanogap electrode to form the nano‐junctions. The results highlight that the hole mobilities in the composite nanoparticles decrease by two‐fold compared to pure donor nanoparticles. However, no significant change between the two kinds of composite nanoparticle morphologies is observed, indicating that conduction pathways for the holes are as efficient for donor proportion in the shell from 40% to 60%. Organic photovoltaic (OPV) devices are fabricated from water‐based colloidal inks containing the two composite nanoparticles (P3HT:eh‐IDTBR and P3HT:o‐IDTBR) and no significant change in the performances is observed in accordance with the mobility results. Through this study, the performance of OPV devices have been succesfully correlated to the transport properties of nanoparticles having different morphology via innovative nanoscale devices.

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Modulation of Phase Separation Morphology by Configuration Engineering in Bulk Heterojunction Organic Solar Cells

Zhou,

Liu,

Zhang

et al. 2024

Solar RRL

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For bulk‐heterojunction organic solar cells (OSCs), molecular structure design to control molecular stacking is crucial to obtain ideally phase‐separated morphology and high device performance. Herein, the investigation focuses on two polythiophene‐quinoxaline (PTQ) derivatives (PTQ8 and PTQ10) blended with Y6, utilizing coarse‐grained molecular dynamics simulations based on the Lennard–Jones static potential (LJSP) method. The study reveals that the diminished photovoltaic efficiencies of PTQ8:Y6 blends, compared to PTQ10:Y6 blends, are not solely attributed to reduced driving forces. The introduction of fluorine‐substituted sites in the thiophene group of PTQ polymer is identified as a significant factor. This alteration causes PTQ polymers in PTQ8:Y6 blends to coil, compromising the crystalline structure. PTQ8's bifluorine group induces a repulsive effect on the quinoxaline group, leading to a coiled‐chain structure that hinders chain stacking. Conversely, PTQ10 exhibits a straighter chain conformation. Additionally, PTQ8's high solubility in chloroform prevents effective aggregation, further impeding suitable morphology formation. Coarse‐grained simulations employing LJSP prove effective in precisely exploring the morphology of OSCs, offering crucial insights for materials in this field.

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Water-based solar cells over 10% efficiency: designing soft nanoparticles for improved processability

Abstract: Organic semiconductors are typically dissolved in organic solvents that are harmful to human health and the environment. To overcome this issue, these materials can be dispersed in water as nanoparticles...

Cited by 4 publications

References 51 publications

Water-based layer-by-layer processing enables 19% efficient binary organic solar cells with minimized thickness sensitivity

Water-based layer-by-layer processing enables 19% efficient binary organic solar cells with minimized thickness sensitivity

Organic Nano‐Junctions: Linking Nanomorphology and Charge Transport in Organic Semiconductor Nanoparticles for Organic Photovoltaic Devices

Modulation of Phase Separation Morphology by Configuration Engineering in Bulk Heterojunction Organic Solar Cells

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