Isoindigo‐3,4‐Difluorothiophene Polymer Acceptors Yield “All‐Polymer” Bulk‐Heterojunction Solar Cells with over 7 % Efficiency

Liu, Shengjian; Firdaus, Yuliar; Thomas, Simil; Kan, Zhipeng; Cruciani, Federico; Lopatin, Sergei; Brédas, Jean‐Luc; Beaujuge, Pierre M.

doi:10.1002/ange.201709509

Cited by 15 publications

(7 citation statements)

References 33 publications

(43 reference statements)

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“…182 More recently, Beaujuge and co-workers developed a highly efficient P A (PIID[2F]T, Figure 7), which is composed of alternating IID and [2F]T units with branched alkyl side chains (2-butyloctyl/ 2-hexyldecyl: 2BO/2HD) arranged in random sequences. 181 The electron-deficient [2F]T unit was introduced to reduce the intrinsically high HOMO and LUMO energy levels of IIDcontaining polymers. As a result, an outstanding PCE of 7.3% in all-PSCs was achieved.…”

Section: Materials Development and Design Rules For All-pscsmentioning

confidence: 99%

Recent Advances, Design Guidelines, and Prospects of All-Polymer Solar Cells

et al. 2019

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All-polymer solar cells (all-PSCs) consisting of polymer donors (P Ds) and polymer acceptors (P As) have drawn tremendous research interest in recent years. It is due to not only their tunable optical, electrochemical, and structural properties, but also many superior features that are not readily available in conventional polymer–fullerene solar cells (fullerene-PSCs) including long-term stability, synthetic accessibility, and excellent film-forming properties suitable for large-scale manufacturing. Recent breakthroughs in material design and device engineering have driven the power conversion efficiencies (PCEs) of all-PSCs exceeding 11%, which is comparable to the performance of fullerene-PSCs. Furthermore, outstanding mechanical durability and stretchability have been reported for all-PSCs, which make them stand out from the other small molecule-based PSCs as a promising power supplier for wearable electronic devices. This review provides a comprehensive overview of the important work in all-PSCs, in which pertinent examples are deliberately chosen. First, we describe the key components that enabled the recent progresses of all-PSCs including rational design rules for efficient P Ds and P As, blend morphology control, and light harvesting engineering. We also review the recent work on the understanding of the stability of all-PSCs under various external conditions, which highlights the importance of all-PSCs for future implementation and commercialization. Finally, because all-PSCs have not yet achieved their full potential and are still undergoing rapid development, we offer our views on the current challenges and future prospects.

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Section: Materials Development and Design Rules For All-pscsmentioning

confidence: 99%

Recent Advances, Design Guidelines, and Prospects of All-Polymer Solar Cells

et al. 2019

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“…On the other hand, among the main parameters that determine PCE of all-PSCs, both open-circuit voltage ( V OC ) and short-circuit current ( J SC ) could be improved by precise chemical tailoring and material mapping to enhance PCE. , However, it is elusive and difficult to achieve a high fill factor (FF), which becomes the key factor constraining the PCE . Even the reported efficient all-PSCs have got relatively high PCEs and the FFs may be typically below 70%. , On the whole, still very limited effort has been done about the influence of D/A ratio on device performance and corresponding intrinsic mechanism, especially for the highly efficient all-PSCs (PCE >8%) with FF > 70%, whereas it is of real significance to promote the development of this photovoltaic technology toward practical application.…”

Section: Introductionmentioning

confidence: 99%

“…28 Even the reported efficient all-PSCs have got relatively high PCEs and the FFs may be typically below 70%. 29,30 On the whole, still very limited effort has been done about the influence of D/A ratio on device performance and corresponding intrinsic mechanism, especially for the highly efficient all-PSCs (PCE >8%) with FF > 70%, whereas it is of real significance to promote the development of this photovoltaic technology toward practical application.…”

Section: ■ Introductionmentioning

confidence: 99%

High-Performance All-Polymer Solar Cells with a High Fill Factor and a Broad Tolerance to the Donor/Acceptor Ratio

Liu

Zou

Wang

et al. 2018

ACS Appl. Mater. Interfaces

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Manipulating the donor/acceptor (D/A) weight ratio is a critical route to produce highly efficient polymer solar cells (PSCs). However, most of the reported device performances are strongly sensitive to the blend ratio. In this work, highly efficient all-PSCs based on PBDB-T:N2200 active layer have been achieved, presenting impressive photovoltaic performance with high tolerance to wide D/A ratios ranging from 1:1 to 9:1, thus providing a broad blend ratio processing window for future practical production. In particular, the optimal device delivers the champion power conversion efficiency (PCE) of 8.61% with an outstanding fill factor (FF) of up to 75.4%, which is one of the highest FF values for the reported binary all-PSCs. Comprehensive morphological, electrical, and mechanism analysis together pointed out that the remarkable device performance are derived from the favorable interpenetrating network morphology, efficient exciton generation/dissociation, well-balanced carrier transport, and reduced bimolecular recombination. Moreover, compared to the small molecule-based and fullerene-based PSC counterparts, the all-PSCs demonstrate an excellent resilience to the D/A ratio, maintaining over 50% of the maximum PCE at a ratio of 49:1 with an extremely low acceptor content. These results depict a bright prospect of the developed all-PSCs for promising applications as flexible and scalable optoelectronic devices.

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“…[78] Recently,arange of IID-basedn -type polymers with different alkyl chains were developedb yB eaujuge et al via copolymerization with difluorothiophene. [79] The resulting random polymer PIID2BO/2HD showede xcellent miscibility with the WBG p-type polymer PBFTAZ, giving aP CE of 7.3 %. Very recently,L i and Zhang et al developedanovel n-type polymer PZ1 by embedding an acceptor-donor-acceptor building block (IDIC) into the polymers keleton.…”

Section: Pdi-and Ndti-basedn-typepolymersmentioning

confidence: 99%

Recent Progress in All‐Polymer Solar Cells Based on Wide‐Bandgap p‐Type Polymers

Zhu

Fan

Ying

et al. 2019

Chemistry An Asian Journal

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All‐polymer solar cells (all‐PSCs), with the photoactive layer exclusively composed of polymers as both donor and acceptor, have attracted growing attention due to their unique merits in optical, thermal and mechanical durability. Through the combined strategies in materials design and device engineering, recently the power conversion efficiencies of single‐junction all‐PSCs have been boosted up to 11 %. This review focuses on the recent progress of all‐PSCs comprising of wide band‐gap p‐type polymers, especially those based on the units of thieno[3,4‐c]pyrrole‐4,6(5H)‐dione], fluorinated benzotriazole, benzo[1,2‐c:4,5‐c′]dithiophene‐4,8‐dione, and pyrrolo[3,4‐f]benzotriazole‐5,7(6H)‐dione. Meantime, several categories of n‐type polymers used to match with these polymer donors are also reviewed. Finally, a brief summary of the strategies of molecular design and morphology optimization is given, and strategies toward further improving performance of all‐PSCs are outlined.

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Isoindigo‐3,4‐Difluorothiophene Polymer Acceptors Yield “All‐Polymer” Bulk‐Heterojunction Solar Cells with over 7 % Efficiency

Cited by 15 publications

References 33 publications

Recent Advances, Design Guidelines, and Prospects of All-Polymer Solar Cells

Recent Advances, Design Guidelines, and Prospects of All-Polymer Solar Cells

High-Performance All-Polymer Solar Cells with a High Fill Factor and a Broad Tolerance to the Donor/Acceptor Ratio

Recent Progress in All‐Polymer Solar Cells Based on Wide‐Bandgap p‐Type Polymers

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