An efficient polymer acceptor <i>via</i> a random polymerization strategy enables all-polymer solar cells with efficiency exceeding 17%

Li, Yun; Li, Qian; Cai, Yunhao; Jin, Hui; Zhang, Jianqi; Tang, Zheng; Zhang, Chunfeng; Wei, Zhixiang; Sun, Yanming

doi:10.1039/d2ee00972b

Cited by 49 publications

(41 citation statements)

References 47 publications

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“…For IDIC-type polymer acceptors, the OSCs have yielded PCEs of approximately 12 %. When the PSMA strategy was used for Y6 molecules, [57][58][59][60][61][62] the PCEs increased to over 18 %. [63] Note that the M n s are usually lower than 15 kDa for Y6-based highly efficient PSMA acceptors, corresponding to a repeat unit number of � 10.…”

Section: All-polymer Oscsmentioning

confidence: 99%

Recent Advances in Single‐Junction Organic Solar Cells

Yao

Hou

2022

Angewandte Chemie

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Single‐junction organic solar cells (OSCs) have made significant progress in recent years. Innovations in material design and device optimization have improved the power conversion efficiencies to over 19 %. In this Minireview, based on recent advances, we discuss molecular design strategies to tune the absorption spectrum, energy level, and intermolecular aggregation as well as highlight the role of molecular electrostatic potential in decreasing energy loss. Then, we introduce the latest progress in four types of OSCs composed of different donor:acceptor combinations: polymer donor:small‐molecule acceptor, all‐polymer, all‐small‐molecule, and small‐molecule donor:polymer acceptor. Finally, the challenges of OSCs in practical applications, including material cost, stability, and multi‐function integration, are discussed.

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Section: All-polymer Oscsmentioning

confidence: 99%

Recent Advances in Single‐Junction Organic Solar Cells

Yao

Hou

2022

Angewandte Chemie

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“…Due to their similar advantages to small molecule acceptor-based OSCs, All-PSCs possess better mechanical properties, such as higher tensile and flexural toughness, and potentially higher thermal stability, which give them better prospects for mass production [ 18 , 19 , 20 ]. Recently, the strategy of polymerized small molecule acceptors (PSMAs) has boosted the efficiency of All-PSCs to over 17% [ 21 , 22 ]. However, most of the high PCEs for these all-PSCs have been based on active layers that were processed from either chloroform (CF) or a CF-dominant solvent mixture [ 20 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Sequential Processing Enables 17% All-Polymer Solar Cells via Non-Halogen Organic Solvent

et al. 2022

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All-polymer solar cells (All-PSCs), whose electron donor and acceptors are both polymeric materials, have attracted great research attention in the past few years. However, most all-PSC devices with top-of-the-line efficiencies are processed from chloroform. In this work, we apply the sequential processing (SqP) method to fabricate All-PSCs from an aromatic hydrocarbon solvent, toluene, and obtain efficiencies up to 17.0%. By conducting a series of characterizations on our films and devices, we demonstrate that the preparation of SqP devices using toluene can effectively reduce carrier recombination, enhance carrier mobility and promote the fill factor of the device.

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“…All-polymer solar cells (all-PSCs) have many advantages such as good film-forming properties, high photostability, and high thermal stability, which has attracted growing attention. − Benefited from the concept of polymerized small-molecule acceptors (PSMAs) and the development of A–DA′D–A-type small-molecule acceptors (SMAs), , the power conversion efficiency (PCE) of the all-PSCs with A–DA′D–A SMA-based PSMAs as polymer acceptors has been rapidly boosted to 16–17% recently. − …”

Section: Introductionmentioning

confidence: 99%

High-Performance Polymer Acceptor Synthesized by an Asymmetric Copolymerization Strategy

Zhu

et al. 2022

Macromolecules

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On the basis of the polymerized small-molecule acceptor (PSMA) strategy, we propose a new synthetic strategy of asymmetric copolymerization for synthesizing polymer acceptors. By selecting two different small-molecule acceptors (SMAs), Y5-γ and Y5-F-Br-o, with defined chemical configurations as building blocks, we synthesized a PSMA polymer acceptor PA1-o by asymmetric copolymerization of the two SMA building blocks and a thiophene linking unit.Compared with the all-polymer solar cell (all-PSC) based on PY-IT (Y5-γ-derived PSMA) showing a power conversion efficiency (PCE) of 15.1% with a higher open-circuit voltage (V oc ) of 0.925 V and that based on PYF-T-o (Y5-F-Br-oderived PSMA) displaying a PCE of 15.4% with a higher short-circuit current density (J sc ) of 24.35 mA cm −2 , the PM6:PA1-o-based all-PSC achieved the highest PCE of 16.0%, with a balanced V oc of 0.925 V, a J sc of 23.99 mA cm −2 , and a higher fill factor of 0.722. The results indicate that asymmetric copolymerization is an effective strategy for synthesizing high-performance PSMAs.

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An efficient polymer acceptor via a random polymerization strategy enables all-polymer solar cells with efficiency exceeding 17%

Abstract: A series of polymer acceptors have been synthesized. The optical and electronic properties of the copolymers can be well-tuned via a random copolymerization strategy. The best-performing PY-82-based binary device produces a record-high efficiency of 17.15%.

Cited by 49 publications

References 47 publications

Recent Advances in Single‐Junction Organic Solar Cells

Recent Advances in Single‐Junction Organic Solar Cells

Sequential Processing Enables 17% All-Polymer Solar Cells via Non-Halogen Organic Solvent

High-Performance Polymer Acceptor Synthesized by an Asymmetric Copolymerization Strategy

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