New Type of Polymerized Small A-D-A Acceptors Constructed by Conjugation Extension in the Branched Direction

Ma, Kun; Liang, Huazhe; Wang, Yuxin; Xiao, Zheng; Jiang, Changzun; Feng, Wanying; Zhang, Zhe; Si, Xiaodong; Liu, Jian; Wan, Xiangjian; Kan, Bin; Li, Chenxi; Yao, Zhaoyang; Chen, Yongsheng

doi:10.1021/acsmaterialslett.3c00045

Cited by 7 publications

(5 citation statements)

References 59 publications

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“…Most recently, Chen et al introduced a different strategy to polymerize the ADA′DA-type small-molecule acceptors (SMAs) . Considering that the conventional method of polymerizing SMAs through the terminal groups would damage the preferred stackings of terminal groups, they subtly performed the polymerization along the side-chain of SMAs.…”

Section: Biaxially Conjugated Polymersmentioning

confidence: 99%

“…Most recently, Chen et al introduced a different strategy to polymerize the ADA′DA-type small-molecule acceptors (SMAs). 66 Considering that the conventional method of polymerizing SMAs through the terminal groups would damage the preferred stackings of terminal groups, they subtly performed the polymerization along the side-chain of SMAs. This strategy not only extends the molecular conjugation in the branched direction but also liberates the terminal groups for more efficient intermolecular stacking.…”

Section: Biaxially Conjugated N-type Polymersmentioning

confidence: 99%

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Biaxially Conjugated Materials for Organic Solar Cells

Fan,

Gao,

Jen

2023

ACS Nano

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Organic solar cells (OSCs) represent one of the most important emerging photovoltaic technologies that can implement solar energy conversion efficiently. The chemical structure of organic semiconductors deployed in the active layer of OSCs plays a critical role in the photovoltaic performance and chemical/physical stability of relevant devices. With the structure innovation of organic semiconductors, especially nonfullerene acceptors (NFAs), the performance of OSCs have been promoted rapidly in recent years, with state-of-theart power conversion efficiencies (PCEs) exceeding 19.5%. Compared with other photovoltaics like perovskite, the shortcoming of OSCs mainly lies in the high nonradiative recombination loss. However, the photocurrent density is superior in OSCs owing to the easy modulation of the NFA band gap toward the near-infrared region. In these regards, the effort to further boost the PCE of OSCs to achieve a milestone >21% should be devoted to reducing the nonradiative loss while further broadening the absorption band. Developing organic semiconductors with biaxially extended conjugated structures has provided a potential solution to achieve these goals. Herein, we summarize the design rules and performance progress of biaxially extended conjugated materials for OSCs. The descriptions are divided into two major categories, i.e., polymers and NFAs. For p-type polymers, we focus on the biaxial conjugation on some representative building blocks, e.g., polythiophene, triphenylamine, and quinoxaline. Whereas for n-type polymers, some structures with large conjugated planes in the normal direction are presented. We also elaborate on the biaxial conjugation strategies in NFAs with modification site at either the π-core or side-group. The general structure−property relationships are further retrieved within these materials, with focus on the short-wavelength absorption and nonradiative energy loss. Finally, we provide an outlook for the further structure modification strategies of biaxially conjugated materials toward highly efficient, stable, and industry-compatible OSCs.

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Section: Biaxially Conjugated Polymersmentioning

confidence: 99%

Section: Biaxially Conjugated N-type Polymersmentioning

confidence: 99%

Biaxially Conjugated Materials for Organic Solar Cells

Fan,

Gao,

Jen

2023

ACS Nano

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“…[ 47 ] Soon after, inspired by PY‐IT, various regio‐regular PMSAs have been designed and synthesized. [ 82‐88 ] Compared with most other PSMAs (regio‐random and regio‐regular), [ 89‐96 ] PY‐IT exhibits simpler synthetic pathways and controllability of the polymerization process. In this review article, we only discuss the widely used PY‐IT.…”

Section: Materials Design and Device Engineeringmentioning

confidence: 99%

PY‐IT, an Excellent Polymer Acceptor^†

Bai,

Liang,

Liu

et al. 2023

Chin. J. Chem.

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Comprehensive SummaryAll‐Polymer solar cells (all‐PSCs) have attracted considerable attention due to their inherent advantages over other types of organic solar cells, including superior optical and thermal stability, as well as exceptional mechanical durability. Recently, all‐PSCs have experienced remarkable advancements in device performance thanks to the invention of polymerized small‐molecule acceptors (PSMAs) since 2017. Among these PSMAs, PY‐IT has garnered immense interest from the scientific community due to its exceptional performance in all‐PSCs. In this review, we presented the design principles of PY‐IT and discussed the various strategies employed in device engineering for PY‐IT‐based all‐PSCs. These strategies include additive and interface engineering, layer‐by‐layer processing methods, meniscus‐assisted coating methods, and ternary strategy. Furthermore, this review highlighted several novel polymeric donor materials that are paired with PY‐IT to achieve efficient all‐PSCs. Lastly, we summarized the inspiring strategies for further advancing all‐PSCs based on PY‐IT. These strategies aim to enhance the overall performance and stability of all‐PSCs by exploring new materials, optimizing device architectures, and improving fabrication techniques. By leveraging these approaches, we anticipate significant progress in the development of all‐PSCs and their potential as a viable renewable energy source.This article is protected by copyright. All rights reserved.

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“…Currently, there have been numerous reports on highperformance PSMAs achieved by directly polymerizing Y-series SMAs with different linkers. [21,26,27] However, most polymer acceptors are copolymerized through terminal units and linkers, which comes with certain disadvantages that cannot be ignored. First, it affected intermolecular packing.…”

Section: Introductionmentioning

confidence: 99%

A Polymer Acceptor with Grafted Small Molecule Acceptor Unit for Efficient All Polymer Organic Solar Cells

Shi,

Huang,

et al. 2023

Macromol. Rapid Commun.

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A polymer acceptor, named PX‐1, has been designed and synthesized using a polymerization strategy with grafted small molecule acceptors. This design approach allows for the freedom of end groups while maintaining efficient terminal packing, enhancing π‐π interactions, and facilitating charge transport. All‐polymer organic solar cells based on PM6: PX‐1 demonstrate a promising efficiency of 13.55%. The result presents an alternative pathway for the design of high‐efficiency polymer acceptors through the careful regulation of small molecule acceptor monomers and linker units.This article is protected by copyright. All rights reserved

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New Type of Polymerized Small A-D-A Acceptors Constructed by Conjugation Extension in the Branched Direction

Cited by 7 publications

References 59 publications

Biaxially Conjugated Materials for Organic Solar Cells

Biaxially Conjugated Materials for Organic Solar Cells

PY‐IT, an Excellent Polymer Acceptor^†

A Polymer Acceptor with Grafted Small Molecule Acceptor Unit for Efficient All Polymer Organic Solar Cells

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New Type of Polymerized Small A-D-A Acceptors Constructed by Conjugation Extension in the Branched Direction

Cited by 7 publications

References 59 publications

Biaxially Conjugated Materials for Organic Solar Cells

Biaxially Conjugated Materials for Organic Solar Cells

PY‐IT, an Excellent Polymer Acceptor†

A Polymer Acceptor with Grafted Small Molecule Acceptor Unit for Efficient All Polymer Organic Solar Cells

Contact Info

Product

Resources

About

PY‐IT, an Excellent Polymer Acceptor^†