An over 16% efficiency organic solar cell enabled by a low-cost pyrazine-based polymer donor

Ren, Junzhen; Zhang, Shaoqing; Bi, Pengqing; Chen, Zhihao; Zhang, Tao; Wang, Jingwen; Ma, Lijiao; Li, Jiayao; Hou, Jianhui

doi:10.1039/d2ta07249a

Cited by 16 publications

(12 citation statements)

References 41 publications

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“…The integrated J SC values are 12.0, 15.1, and 25.5 mA cm –2 for the TBT-10-, TBT-11-, and TBT-13-based cells, respectively, which are consistent with the results from the J – V measurements. In addition, we also selected two representative low-cost doners, PTVT-T and PPz-T (Figure S10), to evaluate the photovoltaic performance of TBT-13. From the results provided in Figure S11 and Table S12, the cell based on PPz-T can achieve an excellent PCE of 12%.…”

Section: Resultsmentioning

confidence: 99%

Molecular Design of Fully Nonfused Acceptors for Efficient Organic Photovoltaic Cells

Yang,

Cui,

Zhang

et al. 2024

J. Am. Chem. Soc.

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The nonfused thiophene−benzene−thiophene (TBT) unit offers advantages in obtaining low-cost organic photovoltaic (OPV) materials due to its simple structure. However, OPV cells, including TBT-based acceptors, exhibit significantly lower energy conversion efficiencies. Here, we introduce a novel approach involving the design and synthesis of three TBT-based acceptors by substituting different positionbranched side chains on the TBT unit. In comparison to TBT-10 and TBT-11, TBT-13, which exclusively incorporates α-position branched side chains with a large steric hindrance, demonstrates a more planar and stable conformation. When blended with the donor PBQx-TF, TBT-13-based blend film achieves favorable π−π stacking and aggregation characteristics, resulting in excellent charge transfer performance in the corresponding device. Due to the simultaneous enhancements in short-circuit current density and fill factor, the TBT-13-based OPV cell obtains an outstanding efficiency of 16.1%, marking the highest value for the cells based on fully nonfused acceptors. Our work provides a practical molecular design strategy for high-performance and low-cost OPV materials.

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Section: Resultsmentioning

confidence: 99%

Molecular Design of Fully Nonfused Acceptors for Efficient Organic Photovoltaic Cells

Yang,

Cui,

Zhang

et al. 2024

J. Am. Chem. Soc.

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“…Organic solar cells (OSCs) can convert light energy into electricity directly and have attracted considerable attention over the last three decades, due to their potential advantages, such as low cost, mechanical flexibility, semitransparency, solution processing, easiness to scale-up fabrication, etc. [1][2][3][4][5] Since Frenkel excitons, produced by organic semiconductors upon light excitation, suffer from a high binding energy of hundreds of meV and cannot dissociate into free charge carriers upon thermal vibration directly, the active layer of current mainstream OSCs generally contains, at least, two components, viz.…”

Section: Introductionmentioning

confidence: 99%

Additive-assisted strategy for high-efficiency organic solar cells

Xie,

He,

Zhao

2024

J. Mater. Chem. C

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“…However, the high synthetic complexity and high production cost of the BDT-based polymer donors are not conducive to the large-scale industrial manufacturing of OSCs. [27,28] It is desirable to develop low cost polymer donors [29][30][31][32][33] with simple repeating units and low synthetic complexity, among which polymer PTQ10 [29] (Figure 1a) with a very simple 6,7-difluoroquinoxalinethiophene backbone is the representative one. So far, PTQ10 based binary OSCs have achieved more than 18% PCEs (Table S1, Supporting Information), [11,17] showing the promising future.…”

Section: Introductionmentioning

confidence: 99%

Polymer Donor with a Simple Skeleton and Minor Siloxane Decoration Enables 19% Efficiency of Organic Solar Cells

Chen,

Liang

et al. 2024

Advanced Materials

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Development of polymer donors with simple chemical structure and low cost is of great importance for commercial application of organic solar cells (OSCs). Here, side‐chain random copolymer PMQ‐Si605 with a simply 6,7‐difluoro‐3‐methylquinoxaline‐thiophene backbone and 5% siloxane decoration of side chain was synthesized in comparison with its alternating copolymer PTQ11. Relative to molecular weight (Mn) of 28.3 kg mol−1 for PTQ11, the random copolymer PMQ‐Si605 with minor siloxane decoration is beneficial for achieving higher Mn up to 51.1 kg mol−1. In addition, PMQ‐Si605 can show stronger aggregation ability and faster charge mobility as well as more efficient exciton dissociation in active layer as revealed by femtosecond transient absorption spectroscopy. With L8‐BO‐F as acceptor, its PMQ‐Si605 based OSCs display power conversion efficiency (PCE) of 18.08%, much higher than 16.21% for PTQ11 based devices. With another acceptor BTP‐H2 to optimize the photovoltaic performance of PMQ‐Si605, further elevated PCEs of 18.50% and 19.15% can be achieved with the binary and ternary OSCs, respectively. Furthermore, PMQ‐Si605 based active layers are suitable for processing in high humidity air, an important factor for massive production of OSCs. Therefore, the siloxane decoration on polymer donors is promising, affording PMQ‐Si605 as a high‐performing and low cost candidate.This article is protected by copyright. All rights reserved

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An over 16% efficiency organic solar cell enabled by a low-cost pyrazine-based polymer donor

Abstract: Here low-cost and completely non-fused polymer donor PPz-T was synthesized based the pyrazine unit that can be widely available in the market. The optimal PPz-T:eC9-based device shows a high PCE of 16.16%, which is among the highest performances based on low-cost polymer donors.

Cited by 16 publications

References 41 publications

Molecular Design of Fully Nonfused Acceptors for Efficient Organic Photovoltaic Cells

Molecular Design of Fully Nonfused Acceptors for Efficient Organic Photovoltaic Cells

Additive-assisted strategy for high-efficiency organic solar cells

Polymer Donor with a Simple Skeleton and Minor Siloxane Decoration Enables 19% Efficiency of Organic Solar Cells

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