Suppressing non-radiative loss via a low-cost solvent additive enables high-stable all-polymer solar cells with 16.13% efficiency

Li, Zhenye; Liang, Yingfang; Qian, Xitang; Ying, Lei; Cao, Yong

doi:10.1016/j.cej.2022.136877

Cited by 13 publications

(4 citation statements)

References 57 publications

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“…2-CN had a slightly higher polarity than 1-CN, which changes the interaction between the additive and photovoltaic materials, producing an additional route to realize improved thin-film morphology. [24][25][26] In addition, solid 2-CN can be better transported than liquid 1-CN.…”

Section: Resultsmentioning

confidence: 99%

An Isomeric Solid Additive Enables High‐Efficiency Polymer Solar Cells Developed Using a Benzo‐Difuran‐Based Donor Polymer

Chen

et al. 2023

Advanced Materials

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Currently, nearly all high‐efficiency organic photovoltaic devices use donor polymers based on the benzo‐dithiophene (BDT) unit. To diversify the choices of building blocks for high‐performance donor polymers, the use of benzo‐difuran (BDF) units is explored, which can achieve reduced steric hindrance, stronger molecular packing, and tunable energy levels. In previous research, the performance of BDF‐based devices lagged behind those of BDT‐based devices. In this study, a high efficiency (18.4%) is achieved using a BDF‐based polymer donor, which is the highest efficiency reported for BDF donor materials to date. The high efficiency is enabled by a donor polymer (D18‐Fu) and the aid of a solid additive (2‐chloronaphthalene), which is the isomer of the commonly used additive 1‐chloronaphthalene. These results revealed the significant effect of 2‐chloronaphthalene in optimizing the morphology and enhancing the device parameters. This work not only provides a new building block that can achieve an efficiency comparable to dominant BDT units but also proposes a new solid additive that can replace the widely used 1‐chloronaphthalene additive.

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Section: Resultsmentioning

confidence: 99%

An Isomeric Solid Additive Enables High‐Efficiency Polymer Solar Cells Developed Using a Benzo‐Difuran‐Based Donor Polymer

Chen

et al. 2023

Advanced Materials

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“…In addition to these results, one more important issue is to rationally claim why such vertical distribution appears: (i) the polymerized Y-series acceptor usually has a higher surface free energy than PM6, which supports its agglomeration at the bottom top of the active layer in both BC and SqP films; (ii) the polymer acceptor (PY-DT herein) has better solubility in solvent additive 1-chloronaphthalene (1-CN), which means it will be partially deposited after the removal of the main solvent toluene, and shows a sudden content ratio increase at the top surface in BC films. [59][60][61] Finally, the operational stability of the BC and SqP devices are evaluated by placing them under maximal power point (MPP) tracking (Fig. 6).…”

Section: Resultsmentioning

confidence: 99%

Highly efficient and stable binary all-polymer solar cells enabled by sequential deposition processing tuned microstructures

Zhao

et al. 2022

J. Mater. Chem. C

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“…The solvent additive is commonly employed in APSCs, which can regulate molecular aggregation behavior during volatilization. For example, 1‐chloronaphthalene (CN) was employed as a solvent an additive into PBDB‐T:PYF‐T chlorobenzene (CB) solution by Li et al, [ 60 ] realizing a PCE of 16.13% with simultaneously boosted V OC of 0.86 V and FF of 76.02%. The π – π stacking of PBDB‐T:PYF‐T system can be improved by incorporating appropriate CN as an additive, which should be beneficial to charge transport in active layers for well‐supporting FF improvement of APSCs.…”

Section: Device Engineeringmentioning

confidence: 99%

Recent Progress of All Polymer Solar Cells with Efficiency Over 15%

et al. 2023

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New substitutes are urgently needed for human beings to satisfy the development of society with the consumption and exhaustion of fossil energy such as oil, coal, and natural gas. The photovoltaic technology has been considered as a promising approach to deal with the energy crisis, which enables the use of solar energy in a renewable manner. Polymer solar cells (PSCs) have attracted enormous attention characterizing of low cost, lightweight, flexibility, tunable color, transparency, environmentally friendly features, etc. PSCs exhibit promising applications in flexible portable electronic equipment and photovoltaic integration of buildings in addition to traditional power generation. Benefiting from the development of various functional layer materials, device structure, and manufacturing process, the power conversion efficiency (PCE) of PSCs has been significantly improved to 18-19%, signifying the coming of dawn for commercial application of PSCs. Among all kinds of PSCs, all-polymer solar cells (APSCs) with polymeric semiconductors as donor and acceptor possess increasingly attractive due to their unique advantages of mechanical flexibility, morphology stability, and good film formation property, which is more suitable for large-scale production.The earliest appearance of APSCs can be dated back to 1995. In 1995, Heeger et al. prepared APSCs using CN-PPV as acceptor and MEH-PPV as donor, producing a PCE of 0.9%. [1] The relatively low PCE at the time is mainly due to the low electron mobility of polymer acceptor on order of 10 À7 %10 À5 cm 2 V À1 s À1 magnitude. Many efforts were then devoted to developing polymer acceptor with higher electron mobility. The development of APSCs was pushed forward with the design and synthesis of naphthalene diimide-(NDI-) and perylenediimide-(PDI-) based polymer acceptors. For example, Yan et al. reported representative NDI-based polymer N2200 in 2009, which was used to prepare field-effect transistors and presented a high electron mobility of 10 À3 cm 2 V À1 s À1 magnitude. [2] Even with the high mobility, the PCE of initial N2200based APSCs was still limited by unsatisfactory phase separation and molecular packing in blend films. [3] The polymer donor having compatible morphology with PDI-and NDI-based polymer acceptor was gradually developed, which triggered the further performance improvement of APSCs, such as the representative polymer donor PTB7, PPDT2FBT, PTB7-Th, PBDTTPD, J71, PBDB-T, and PTzBI-Si, etc. [4][5][6][7][8][9][10] In 2019, a PCE of 11.76% was reported by Zhu et al. with PTzBI-Si:N2200 as the active layer, which was processed with MeTHF and fabricated by slot die printing. [11] In addition to NDI or PDI-based polymer acceptors, the B←N, diketopyrrolopyrrole-, or cyanobenzothiadiazolebased copolymers have also been explored as a new class of polymer acceptors to control the molecular aggregation state or energy levels. [12][13][14] It should be noticed that the relatively weak

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Suppressing non-radiative loss via a low-cost solvent additive enables high-stable all-polymer solar cells with 16.13% efficiency

Cited by 13 publications

References 57 publications

An Isomeric Solid Additive Enables High‐Efficiency Polymer Solar Cells Developed Using a Benzo‐Difuran‐Based Donor Polymer

An Isomeric Solid Additive Enables High‐Efficiency Polymer Solar Cells Developed Using a Benzo‐Difuran‐Based Donor Polymer

Highly efficient and stable binary all-polymer solar cells enabled by sequential deposition processing tuned microstructures

Recent Progress of All Polymer Solar Cells with Efficiency Over 15%

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