Near ultra-violet absorbers for transparent organic solar cells

Mahmoudi, Chaima; Muzuzu, W.; Fall, Sadiara; Zhong, Yuhan; Mélart, C.; Lévêque, P.; Heiser, T.; Jaballah, N.S.; Majdoub, Mustapha; Leclerc, Nicolas

doi:10.1016/j.dyepig.2022.110752

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…To support this statement, we have constructed another PSLM using a new small electron-donor molecule (TAT-Cbz) whose frontier orbital energy gap equals 2.9 eV (Figure S6a). 25 The molecule was blended with PC 60 BM to form a highly transparent photovoltaic layer (Figure S6b). The other materials and the manufacturing process of the PSLM remained unchanged.…”

Section: Toward Smart Window Applicationsmentioning

confidence: 99%

Self-Powered Dynamic Glazing Based on Nematic Liquid Crystals and Organic Photovoltaic Layers for Smart Window Applications

Fall

Wang

Regrettier

et al. 2023

ACS Appl. Mater. Interfaces

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Dynamic windows allow monitoring of in-door solar radiation and thus improve user comfort and energy efficiency in buildings and vehicles. Existing technologies are, however, hampered by limitations in switching speed, energy efficiency, user control, or production costs. Here, we introduce a new concept for self-powered switchable glazing that combines a nematic liquid crystal, as an electro-optic active layer, with an organic photovoltaic material. The latter aligns the liquid crystal molecules and generates, under illumination, an electric field that changes the molecular orientation and thereby the device transmittance in the visible and near-infrared region. Small-area devices can be switched from clear to dark in hundreds of milliseconds without an external power supply. The drop in transmittance can be adjusted using a variable resistor and is shown to be reversible and stable for more than 5 h. First solution-processed large-area (15 cm2) devices are presented, and prospects for smart window applications are discussed.

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Section: Toward Smart Window Applicationsmentioning

confidence: 99%

Self-Powered Dynamic Glazing Based on Nematic Liquid Crystals and Organic Photovoltaic Layers for Smart Window Applications

Fall

Wang

Regrettier

et al. 2023

ACS Appl. Mater. Interfaces

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“…Very recently, Leclerc and coworkers also reported two solution‐processable near‐ultraviolet‐absorbing small molecules for ST‐OSCs, indicating that the all‐NUV strategy for ST‐OSCs has attracted increasing attention. [ 9 ] Although high transparency can be achieved in all NUV solar cells, the wastage of NIR photons results in an extremely low J sc and then severely limits their device performance. Combining the advantages of all‐NIR and all‐NUV strategies, it is easy to conceive that high‐performance ST‐OSCs can be fabricated using a combination of NUV donor and NIR acceptor.…”

Section: Introductionmentioning

confidence: 99%

“…Very recently, Leclerc and coworkers also reported two solution-processable nearultraviolet-absorbing small molecules for ST-OSCs, indicating that the all-NUV strategy for ST-OSCs has attracted increasing attention. [9] Although high transparency can be achieved in all NUV solar cells, the wastage of NIR photons results in an…”

mentioning

confidence: 99%

A 2.20 eV Bandgap Polymer Donor for Efficient Colorful Semitransparent Organic Solar Cells

Xie

Zhang

Yuan

et al. 2022

Adv Funct Materials

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Semitransparent organic solar cells (ST-OSCs) have attracted increasing attention due to their promising prospect in building-integrated photovoltaics. Generally, efficient ST-OSCs with good average visible transmittance (AVT) can be realized by developing active layer materials with light absorption far from the visible light range. Herein, the development of ultrawide bandgap polymer donors with near-ultraviolet absorption, paired with nearinfrared acceptors, is proposed to achieve high-performance ST-OSCs. The key points for the design of ultrawide bandgap polymers include constructing donor-donor type conjugated skeleton, suppressing the quinoidal resonance effect, and minimizing the twist of conjugated skeleton via noncovalent conformational locks. As a proof of concept, a polymer named PBOF with an optical bandgap of 2.20 eV is synthesized, which exhibited largely reduced overlap with the human eye photopic response spectrum and afforded a power conversion efficiency (PCE) of 16.40% in opaque device. As a result, ST-OSCs with a PCE over 10% and an AVT over 30% are achieved without optical modulation. Moreover, colorful ST-OSCs with visual aesthetics can be achieved by tuning the donor/acceptor weight ratio in active layer benefiting from the ultrawide bandgap nature of PBOF. This study demonstrates the great potential of ultrawide bandgap polymers for efficient colorful ST-OSCs.

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Dithienopyran-based narrow-bandgap donor polymers: Unveiling the potential for semitransparent organic solar cells with enhanced NIR absorption

Ryu,

Lee

et al. 2024

Chemical Engineering Journal

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Near ultra-violet absorbers for transparent organic solar cells

Cited by 6 publications

References 22 publications

Self-Powered Dynamic Glazing Based on Nematic Liquid Crystals and Organic Photovoltaic Layers for Smart Window Applications

Self-Powered Dynamic Glazing Based on Nematic Liquid Crystals and Organic Photovoltaic Layers for Smart Window Applications

A 2.20 eV Bandgap Polymer Donor for Efficient Colorful Semitransparent Organic Solar Cells

Dithienopyran-based narrow-bandgap donor polymers: Unveiling the potential for semitransparent organic solar cells with enhanced NIR absorption

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