An efficient interface modification material for improved efficiency and stability in inverted organic solar cells

Suo, Zhaochen; Liu, Jian; Li, Shitong; Yao, Zhaoyang; Li, Chenxi; Wan, Xiangjian; Chen, Yongsheng

doi:10.1039/d3qm00966a

Mater. Chem. Front.

2024

DOI: 10.1039/d3qm00966a

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An efficient interface modification material for improved efficiency and stability in inverted organic solar cells

Zhaochen Suo,

Jian Liu,

Shitong Li

et al.

Abstract: A hybrid ETL is reported for inverted structure OSCs by modifying ZnO with a molecule named NMA-C0. With the hybrid ETL, the device based on PM6:L8-BO achieves an efficiency of 18.31% with good thermal and photo stabilities.

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Cited by 3 publications

References 39 publications

(42 reference statements)

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Compatibilizer Effects of Strategically Designed Donor–Acceptor Block Copolymers to Enhance the Performance, Stability, and Mechanical Durability of Inverted Organic Solar Cells

Tseng,

Fan,

Tsai

et al. 2024

Adv Funct Materials

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A strategically designed donor–acceptor (D‐A) block copolymer (PM6‐b‐PYIT) is introduced, as a compatibilizer to enhance the performance and stability of inverted organic solar cells (OSCs) consisting of a bulk heterojunction (BHJ) of PM6 and L8‐BO. The PM6‐b‐PYIT compatibilizer not only significantly boosts the power conversion efficiency from 16.32% to 18.02%, but also further modulates the molecular arrangement and improves the compatibility between donor and acceptor materials. This stems from the structural similarity between the copolymer and the host materials, which facilitates ordered molecular stacking and superior charge‐transporting properties, thereby improving the dielectric constant and built‐in voltage and mitigating excessive charge recombination. More importantly, the role of the compatibilizer in stabilizing the BHJ morphology under long‐term aging conditions is highlighted, ascribed to the improved miscibility between different components in the BHJ composite. This in turn renders the photoactive layer more mechanically durable, making it suitable for stretchable applications.

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Compatibilizer Effects of Strategically Designed Donor–Acceptor Block Copolymers to Enhance the Performance, Stability, and Mechanical Durability of Inverted Organic Solar Cells

Tseng,

Fan,

Tsai

et al. 2024

Adv Funct Materials

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A Water Solution Processed Hybrid Electron Transport Layer Simultaneously Enhances Efficiency and Stability in Inverted Structure Organic Solar Cells

Suo,

Li,

Liu

et al. 2024

Adv Funct Materials

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Achieving both high efficiency and stability in organic solar cells (OSCs) remains a significant challenge. Inverted structure OSCs, compared to those with a normal structure, show great potential for combining high efficiency with enhanced stability. However, despite their improved stability, the efficiencies of inverted OSCs still lag behind those of conventional structure OSCs, largely due to the performance of electron transport layers (ETLs). Herein, a water‐soluble hybrid ETL is developed by modifying SnO2 nanoparticles with an aqueous potassium carboxylate salt, PMA. This modification effectively passivates the oxygen vacancy defects in the SnO2 nanoparticles and eliminates the light soaking issue observed in the control device. As a result, the PM6:Y6‐based device shows an improvement in efficiency from 16.68% to 17.85% with PMA modification. Notably, an exceptional efficiency of 19.07% is achieved for the PM6:BTP‐eC9‐based device using this hybrid ETL, marking the highest efficiency reported to date for single‐junction inverted OSCs. In addition, all tested OSCs with the hybrid ETL demonstrate superior stability under both thermal and light illumination at the maximum power point compared to the control devices. Furthermore, utilizing this water‐processed hybrid ETL, a large‐area module based on PM6:BO‐4Cl is fabricated and shows an outstanding efficiency of 15.02%.

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Siloxane as Humidity‐Resistant and Stabilizing Additive for Ambient‐Processed Organic Solar Cells

Liu,

Xie,

Zhang

et al. 2024

Advanced Energy Materials

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High‐performing organic solar cells (OSCs) being processed in ambient conditions and possessing long‐term stability are desired toward commercialization. Here, resultantly bifunctional additive is proposed for organic active layer, which can greatly enhance humidity endurance during the air‐processing of the active layer and device stability in the meantime. Intriguingly, with 1% octamethyltrisiloxane (3Si) as the additive, casting PM6:L8‐BO active layer even in 90% relative humidity (RH) air could show comparable efficiency to that in N2 condition. Furthermore, the 3Si‐processed active layers also display remarkably enhanced thermal and light stabilities in conventional OSCs. After thermal aging at 85 °C for 1000 h and simulated solar light aging with UV band at 100 mW cm−2 and 55°C for 1000 h, the 3Si‐processed PM6:L8‐BO binary OSCs maintain 91.6% and 86.1% of the initial efficiency, leading to final averaged efficiencies of 16.17% and 15.42%, respectively. The results represent the most stable OSCs based on additive strategy. The universality of siloxane as a humidity‐resistant and stabilizing agent is also confirmed with other active layer systems, paving a way for broader application of the bifunctional additive.

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An efficient interface modification material for improved efficiency and stability in inverted organic solar cells

Abstract: A hybrid ETL is reported for inverted structure OSCs by modifying ZnO with a molecule named NMA-C0. With the hybrid ETL, the device based on PM6:L8-BO achieves an efficiency of 18.31% with good thermal and photo stabilities.

Cited by 3 publications

References 39 publications

Compatibilizer Effects of Strategically Designed Donor–Acceptor Block Copolymers to Enhance the Performance, Stability, and Mechanical Durability of Inverted Organic Solar Cells

Compatibilizer Effects of Strategically Designed Donor–Acceptor Block Copolymers to Enhance the Performance, Stability, and Mechanical Durability of Inverted Organic Solar Cells

A Water Solution Processed Hybrid Electron Transport Layer Simultaneously Enhances Efficiency and Stability in Inverted Structure Organic Solar Cells

Siloxane as Humidity‐Resistant and Stabilizing Additive for Ambient‐Processed Organic Solar Cells

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