Design of Non-fused Ring Acceptors toward High-Performance, Stable, and Low-Cost Organic Photovoltaics DOI
Qing Shen,

Chengliang He,

Shuixing Li

и другие.

Accounts of Materials Research, Год журнала: 2022, Номер 3(6), С. 644 - 657

Опубликована: Май 25, 2022

ConspectusToward future commercial applications of organic solar cells (OSCs), photovoltaic materials that enable high efficiency, excellent stability, and low cost should be developed. Fused-ring electron acceptors (FREAs) have declared OSCs are capable showing efficiencies over 19%, whereas stability not solved yet. As the counterparts FREAs, non-fused ring (NFREAs) more flexible in molecular design. They better because reduction intramolecular tension via breaking fused backbone advantages with synthetic complexity. However, challenge for NFREAs is relatively lower (around 15% at current stage), which require designs addressing issues conformational unicity effective packing.In this Account, we comprehensively summarize works about carried out our group from three main frameworks, including design efficiency optimization, material cost, stability. First, part existing rotatable single bond will bring problem uncertainty, but it can through proper design, also regulates energy levels, light absorption range, packing mode molecule obtaining higher performance. Thus, part, discuss evolution aspects, skeleton terminal modification, side chain engineering. Many strategies used a skeleton, such as utilizing quinoid effect, introducing functional groups push–pulling using multiple lock. Furthermore, simplifying preferred development tendency. terminal, modification strategy adjusting conjugation length halogen atoms. What more, by to induce appropriate steric hindrance, fix orientation molecules, thus regulating modes. Second, regarding compare synthesis complexities between state-of-the-art FREAs NFREAs. Because processes reduce complex cyclization reactions, routes greatly simplified, obtained minimal steps. Third, analyze workable views intrinsic photostability, thermal Finally, conclude challenges conquered propose perspectives could performed NFREAs, hope pushing toward performance, cost.

Язык: Английский

High‐Pressure Fabrication of Binary Organic Solar Cells with High Molecular Weight D18 Yields Record 19.65 % Efficiency DOI
Hao Lu, Wenlong Liu, Guangliu Ran

и другие.

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(50)

Опубликована: Окт. 26, 2023

In this work, inspired by the principles of a pressure cooker, we utilized high-pressure method to address processing challenges associated with high molecular weight polymers. Through approach, successfully dissolved D18 in chloroform at 100 °C within pressure-tight vial. The increased steam raised boiling point and dissolving capacity chloroform, enabling creation hybrid film superior properties, including more ordered arrangement, crystallinity, extended exciton diffusion length, improved phase morphology. Organic solar cells (OSCs) based on : L8-BO prepared using achieved an outstanding power conversion efficiency 19.65 %, setting new record for binary devices date. Furthermore, was applied fabricate OSCs other common systems, leading significant enhancements device performance. summary, research introduces universal materials, ultimately resulting highest performance reported organic cells.

Язык: Английский

Процитировано

115
Asymmetric side-chain substitution enables a 3D network acceptor with hydrogen bond assisted crystal packing and enhanced electronic coupling for efficient organic solar cells DOI
Zhenghui Luo, Yuan Gao, Hanjian Lai

и другие.

Energy & Environmental Science, Год журнала: 2022, Номер 15(11), С. 4601 - 4611

Опубликована: Янв. 1, 2022

An asymmetric acceptor BTP-PhC6-C11 shows hydrogen bond assisted and tighter crystal packing enhanced electronic coupling as compared with symmetric Y6 BTP-PhC6, organic solar cells based on PM1:BTP-PhC6-C11 realized a highest PCE of 18.33%.

Язык: Английский

Процитировано

108
Solid Additive-Assisted Layer-by-Layer Processing for 19% Efficiency Binary Organic Solar Cells DOI Creative Commons

Guanyu Ding,

Tianyi Chen, Mengting Wang

и другие.

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Апрель 10, 2023

Morphology is of great significance to the performance organic solar cells (OSCs), since appropriate morphology could not only promote exciton dissociation, but also reduce charge recombination. In this work, we have developed a solid additive-assisted layer-by-layer (SAA-LBL) processing fabricate high-efficiency OSCs. By adding additive fatty acid (FA) into polymer donor PM6 solution, controllable pre-phase separation forms between and FA. This intermixed facilitates diffusion acceptor Y6 during LBL processing, due good miscibility fast-solvation FA with chloroform solution dripping. Interestingly, results in desired refined phase-separated domain vertical phase-separation structure better balance transport /collection dissociation. Consequently, binary single junction OSCs based on PM6:Y6 blend reach champion power conversion efficiency (PCE) 18.16% SAA-LBL which can be generally applicable diverse systems, e.g., PM6:L8-BO-based devices thick-film devices. The efficacy confirmed PM6:L8-BO, where record PCEs 19.02% 16.44% are realized for 100 250 nm active layers, respectively. work provides simple effective way control demonstrates promising methodology boosting industrial manufacturing

Язык: Английский

Процитировано

108
20.2% Efficiency Organic Photovoltaics Employing a π‐Extension Quinoxaline‐Based Acceptor with Ordered Arrangement DOI
Zhenyu Chen, Jinfeng Ge, Wei Song

и другие.

Advanced Materials, Год журнала: 2024, Номер 36(33)

Опубликована: Июнь 20, 2024

Organic solar cells, as a cutting-edge sustainable renewable energy technology, possess myriad of potential applications, while the bottleneck problem less than 20% efficiency limits further development. Simultaneously achieving an ordered molecular arrangement, appropriate crystalline domain size, and reduced nonradiative recombination poses significant challenge is pivotal for overcoming limitations. This study employs dual strategy involving development novel acceptor ternary blending to address this challenge. A non-fullerene acceptor, SMA, characterized by highly arrangement high lowest unoccupied orbital level, synthesized. By incorporating SMA guest in PM6:BTP-eC9 system, it observed that staggered liquid-solid transition donor facilitating crystallization ordering maintaining suitable size. Furthermore, optimized vertical morphology bimolecular recombination. As result, device achieved champion 20.22%, accompanied increased voltage, short-circuit current density, fill factor. Notably, stabilized 18.42% attained flexible devices. underscores synergistic approach integrating material innovation techniques optimizing bulk heterojunction photovoltaic performance.

Язык: Английский

Процитировано

108
Design of Non-fused Ring Acceptors toward High-Performance, Stable, and Low-Cost Organic Photovoltaics DOI
Qing Shen,

Chengliang He,

Shuixing Li

и другие.

Accounts of Materials Research, Год журнала: 2022, Номер 3(6), С. 644 - 657

Опубликована: Май 25, 2022

ConspectusToward future commercial applications of organic solar cells (OSCs), photovoltaic materials that enable high efficiency, excellent stability, and low cost should be developed. Fused-ring electron acceptors (FREAs) have declared OSCs are capable showing efficiencies over 19%, whereas stability not solved yet. As the counterparts FREAs, non-fused ring (NFREAs) more flexible in molecular design. They better because reduction intramolecular tension via breaking fused backbone advantages with synthetic complexity. However, challenge for NFREAs is relatively lower (around 15% at current stage), which require designs addressing issues conformational unicity effective packing.In this Account, we comprehensively summarize works about carried out our group from three main frameworks, including design efficiency optimization, material cost, stability. First, part existing rotatable single bond will bring problem uncertainty, but it can through proper design, also regulates energy levels, light absorption range, packing mode molecule obtaining higher performance. Thus, part, discuss evolution aspects, skeleton terminal modification, side chain engineering. Many strategies used a skeleton, such as utilizing quinoid effect, introducing functional groups push–pulling using multiple lock. Furthermore, simplifying preferred development tendency. terminal, modification strategy adjusting conjugation length halogen atoms. What more, by to induce appropriate steric hindrance, fix orientation molecules, thus regulating modes. Second, regarding compare synthesis complexities between state-of-the-art FREAs NFREAs. Because processes reduce complex cyclization reactions, routes greatly simplified, obtained minimal steps. Third, analyze workable views intrinsic photostability, thermal Finally, conclude challenges conquered propose perspectives could performed NFREAs, hope pushing toward performance, cost.

Язык: Английский

Процитировано

105