Ternary polythiophene enables over 17% efficiency organic solar cells

Ai, Qi; Lin, Zhihui; Wu, Xiangxi; Zhu, Yufan; Wang, Ke; Li, Xiaojun; Zhang, Jianqi; He, Dan; Li, Yongfang; Zhao, Fuwen

doi:10.1039/d4ta00932k

J. Mater. Chem. A

2024

DOI: 10.1039/d4ta00932k

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Ternary polythiophene enables over 17% efficiency organic solar cells

Qi Ai,

Zhihui Lin,

Xiangxi Wu

et al.

Abstract: Polythiophenes (PTs) are one of the most promising donor materials for organic solar cells (OSCs), because of the low-cost production. However, most PT-based OSCs suffer from inferior power conversion efficiencies...

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Cited by 3 publications

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Molecular Design and Organic Photovoltaic Applications of Carboxylate‐Functionalized P‐type Polymers

Du,

Li,

et al. 2024

Adv Funct Materials

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The significant progress of p‐type and n‐type active layer materials in the past several years has pushed the power conversion efficiency (PCE) of organic solar cells (OSCs) toward 19%. Due to the relatively low synthesis cost and simple synthesis method of carboxylate‐containing building blocks, including thiophene, thieno[3,2‐b]thiophene, thieno[3,4‐b]thiophene, furan, pyrazine, benzodithiophene, benzothiazole, quinoxaline, etc., are widely used to construct p‐type photovoltaic polymers. These resulting carboxylate‐bearing polymers present downward energy levels, high absorption coefficient, narrow bandgap, high hole mobility, and strong aggregation behavior, which have dabbled in the fabrication of mechanically stretchable, semitransparent, indoor, and tandem OSCs, etc., and produce excellent photovoltaic performance. The low‐cost carboxylate‐containing copolymers exhibit a satisfying PCE approaching 17%, and the random terpolymer systems achieve a high PCE over 19%. This review focuses on the progress of carboxylate‐containing photovoltaic polymers, summarizes the molecular characteristics, discusses their structure‐performance relationship, and offers a summary and outlook on the challenges for future molecular development.

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Molecular Design and Organic Photovoltaic Applications of Carboxylate‐Functionalized P‐type Polymers

Du,

Li,

et al. 2024

Adv Funct Materials

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Prolonging charge carrier lifetime via reinforcing molecular stacking for high-efficiency organic solar cells

Bai,

Wang,

et al. 2024

J. Cent. South Univ.

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Regiospecific Incorporation of Fluorine Atoms in Polythiophene Derivatives for Efficient Organic Solar Cells

Phan,

Lee,

Nguyen

et al. 2024

ACS Appl. Mater. Interfaces

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Derivatives of polythiophene (PT) have garnered considerable attention in organic solar cells (OSCs) because of their relatively uncomplicated molecular structures and cost-effective synthesis. Herein, we have developed two regioisomeric fluorinated PT donors, PEI3T-FITVT and PEI3T-FOTVT, to realize efficient OSCs. PEI3T-FITVT and PEI3T-FOTVT are strategically designed with different fluorine atom arrangements on thiophene-vinyl-thiophene (TVT) units. Notably, PEI3T-FOTVT possesses enhanced backbone planarity induced by F•••S noncovalent interactions between two constituent building blocks. Consequently, PEI3T-FOTVT with the higher aggregation and crystalline properties leads to a 2.5-fold increase in hole mobility over PEI3T-FITVT (from 1.4 × 10 −4 to 3.6 × 10 −4 cm 2 V −1 s −1 ). Furthermore, PEI3T-FOTVT exhibits higher domain purity than PEI3T-FITVT, leading to faster charge transport and reduced charge recombination in OSC devices. These characteristics lead to a higher power conversion efficiency of 14.4% for PEI3T-FOTVT-based OSCs, compared to 12.9% for PEI3T-FITVT-based OSCs.

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Ternary polythiophene enables over 17% efficiency organic solar cells

Abstract: Polythiophenes (PTs) are one of the most promising donor materials for organic solar cells (OSCs), because of the low-cost production. However, most PT-based OSCs suffer from inferior power conversion efficiencies...

Cited by 3 publications

References 39 publications

Molecular Design and Organic Photovoltaic Applications of Carboxylate‐Functionalized P‐type Polymers

Molecular Design and Organic Photovoltaic Applications of Carboxylate‐Functionalized P‐type Polymers

Prolonging charge carrier lifetime via reinforcing molecular stacking for high-efficiency organic solar cells

Regiospecific Incorporation of Fluorine Atoms in Polythiophene Derivatives for Efficient Organic Solar Cells

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