Stretchable ITO‐Free Organic Solar Cells with Intrinsic Anti‐Reflection Substrate for High‐Efficiency Outdoor and Indoor Energy Harvesting

Huang, Jiaming; Ren, Zhiwei; Zhang, Yaokang; Liu, Kuan; Zhang, Hengkai; Tang, Hua; Yan, Cenqi; Zheng, Zijian; Li, Gang

doi:10.1002/adfm.202010172

Cited by 65 publications

(64 citation statements)

References 88 publications

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“…[ 1–3 ] As the PCE of the present OSCs have reached 18% milestones, [ 4–6 ] far beyond the threshold of commercialization, the mechanical stability, and long‐term morphological stability are becoming increasingly critical factors of OSCs for practical applications. [ 7–10 ]…”

Section: Introductionmentioning

confidence: 99%

Intrinsically Stretchable Organic Solar Cells with Simultaneously Improved Mechanical Robustness and Morphological Stability Enabled by a Universal Crosslinking Strategy

Wang

Zhang

Liu

et al. 2022

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Developing intrinsically stretchable organic solar cells (OSCs) with excellent mechanical robustness and long‐term operation stability is highly demanded for practical applications. Here, the representative PM6/Y6 active layer film, crosslinked by a photo‐crosslinkable small molecule 2,6‐bis(4‐azidobenzylidene)cyclohexanone (BAC) containing azide groups, exhibits a significantly enhanced stretchability of 18% and toughness of 6.94 MJ m−3, compared to non‐crosslinked film (stretchability of 4.5% and toughness of 0.75 MJ m−3). It is found that controlling the crosslinking density, including crosslinker concentration and crosslinking time, plays a vital impact on the stretchability and mechanical toughness of active layer film. The resulting intrinsically stretchable OSCs achieve a high power conversion efficiency (PCE) of 13.4% and retain 80% of its performance even under the large strain of 20%. To date, this is the highest PCE for intrinsically stretchable OSCs based on small molecular acceptors. Moreover, crosslinking of active layer film suppresses the crystallization of PM6 polymer chains and avoids the excessive aggregation of small molecular acceptors under thermal heating or light illumination, leading to a stabilized film morphology and significantly improved device stability. Overall, these results provide a universal strategy to simultaneously enhance the mechanical properties and stability of OSCs without sacrificing their photovoltaic performance.

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Section: Introductionmentioning

confidence: 99%

Intrinsically Stretchable Organic Solar Cells with Simultaneously Improved Mechanical Robustness and Morphological Stability Enabled by a Universal Crosslinking Strategy

Wang

Zhang

Liu

et al. 2022

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“…[29][30][31] Although the attractive features of ultraflexible OSCs have been demonstrated, achieving simultaneously high efficiency and excellent mechanical durability is still challenging, especially under large strain (random wrinkling or stretching). [32][33][34] When compared with fullerene receptors, non-fullerene receptors (e.g., 3,9-bis (2-methylene-(3-(1,1-dicyanomethylene)-indanone)-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2′,3′-d′]s-indaceno [1,2-b:5,6-b′]dithiophene series reported by Zhan's group [35] and Y6-series reported by Zou's group [36] ) usually need to be finely optimized their morphologies to form highly crystalline phases with enhanced intermolecular π-π stacking to overcome the relatively low electron mobilities. [37][38][39][40][41] Unfortunately, although increasing crystallinity is beneficial to carrier transport, it also leads to poor phase separation and thereby…”

Section: Introductionmentioning

confidence: 99%

Crumple Durable Ultraflexible Organic Solar Cells with an Excellent Power‐per‐Weight Performance

Song

Zhou

et al. 2021

Adv Funct Materials

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Ultraflexible and ultra-lightweight organic solar cells (OSCs) have attracted great attention in terms of power supply in wearable electronic systems. Here, ultrathin and ultra-lightweight OSCs, with a total thickness of less than 3 µm, with excellent mechanical properties in terms of their flexibility and ability to be stretched are demonstrated. A stabilized power conversion efficiency (PCE) of 15.5% and unprecedented power-per-weight of 32.07 W g −1 at a weight of 4.83 g m −2 is achieved, which represents one of the best-performing OSCs based on ultrathin foils substrate reported to date. The ternary strategy introduces the third component of amorphous conformation of the PC 71 BM molecule, which can slightly reduce crystallization and aggregates without decreasing the electron mobility, thereby reducing rigidity and brittleness of the active layer. The increase in the ductility of the active layer significantly improves the mechanical flexibility of the device, resulting in over 90% retention in the PCE after 200 stretching-compression cycles. In addition, the ternary device exhibits excellent stability when stored in a N 2 -filled glove box, resulting in the PCE retaining over 95% of its initial efficiency even after 1000 h. This ultraflexible and ultra-lightweight photo voltaic foils constitute a major step toward the integration of power supply into malleable electronic textiles.

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“…Their novel substrate has intrinsic antireflection, high transmission, and stretchable properties for highly stretchable ITO‐free OPVs. [ 147 ]…”

Section: Mechanically Flexible Pvsmentioning

confidence: 99%

Advances in Organic and Perovskite Photovoltaics Enabling a Greener Internet of Things

Panidi

Georgiadou

Schoetz

et al. 2022

Adv Funct Materials

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Organic and perovskite solar cells (PSCs) have made significant strides in the last couple of years achieving high power conversion efficiencies (18% and 29%, respectively) and exceptional stability. Ultra‐flexible and environmentally stable organic and PSCs can effectively operate under various illumination settings. Herein, novel device concepts that comprise photovoltaic cells alone or in tandem with batteries or supercapacitors, acting as the main power supply to another microelectronic component, enabling self‐powered electronics for the Internet of Things (IoT) are reviewed. Emphasis is placed on the specific requirements posed by such applications to pave the way to large scale commercialization. The importance of supporting a greener IoT ecosystem by eliminating toxic materials and solvents in the device fabrication process is highlighted.

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Stretchable ITO‐Free Organic Solar Cells with Intrinsic Anti‐Reflection Substrate for High‐Efficiency Outdoor and Indoor Energy Harvesting

Cited by 65 publications

References 88 publications

Intrinsically Stretchable Organic Solar Cells with Simultaneously Improved Mechanical Robustness and Morphological Stability Enabled by a Universal Crosslinking Strategy

Intrinsically Stretchable Organic Solar Cells with Simultaneously Improved Mechanical Robustness and Morphological Stability Enabled by a Universal Crosslinking Strategy

Crumple Durable Ultraflexible Organic Solar Cells with an Excellent Power‐per‐Weight Performance

Advances in Organic and Perovskite Photovoltaics Enabling a Greener Internet of Things

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