Strengthening the Hetero‐Molecular Interactions in Giant Dimeric Acceptors Enables Efficient Organic Solar Cells DOI
Min Lv, Qingyuan Wang, Jianqi Zhang

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(4)

Published: Nov. 23, 2023

Abstract Giant dimeric acceptor (G‐Dimer) is becoming one of the most promising organic solar cell (OSC) materials because its definite structure, long‐term stability, and high efficiency. Strengthening hetero‐molecular interactions by monomer modification greatly influences morphology thus device performance, but lacks investigation. Herein, two novel quinoxaline core‐based G‐Dimers, Dimer‐QX Dimer‐2CF, are synthesized. By comparing trifluoromethyl‐substituted Dimer‐2CF non‐substituted Dimer‐QX, trifluoromethylation effect on G‐Dimer investigated revealed. The trifluoromethyl with strong electronegativity increases electrostatic potential reduces surface energy G‐Dimer, weakening homo‐molecular ordered packing reinforcing interaction donor. suppresses fast assembly during film formation, facilitating small domains molecular in blend, which a trade‐off conventional control. Together favorable vertical phase separation, efficient charge generation, reduced bimolecular recombination concurrently obtained. Hence, Dimer‐2CF‐based OSCs obtain cutting‐edge efficiency 19.02% fill factor surpassing 80%, an averaged extrapolated T 80 ≈12 000 h under continuous °C heating. This study emphasizes importance strategy, providing facile strategy for designing highly stable OSC materials.

Language: Английский

Advantages, challenges and molecular design of different material types used in organic solar cells DOI
Jicheng Yi, Guangye Zhang, Han Yu

et al.

Nature Reviews Materials, Journal Year: 2023, Volume and Issue: 9(1), P. 46 - 62

Published: Dec. 15, 2023

Language: Английский

Citations

174
Dimerized small-molecule acceptors enable efficient and stable organic solar cells DOI Creative Commons

Cheng Sun,

Jin‐Woo Lee, Changyeon Lee

et al.

Joule, Journal Year: 2023, Volume and Issue: 7(2), P. 416 - 430

Published: Feb. 1, 2023

Language: Английский

Citations

150
Stability of organic solar cells: toward commercial applications DOI
Pengfei Ding, Daobin Yang,

Shuncheng Yang

et al.

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(5), P. 2350 - 2387

Published: Jan. 1, 2024

Organic solar cells (OSCs) have attracted a great deal of attention in the field clean energy due to their advantages transparency, flexibility, low cost and light weight. Introducing them market enables seamless integration into buildings windows, while also supporting wearable, portable electronics internet-of-things (IoT) devices. With development photovoltaic materials optimization fabrication technology, power conversion efficiencies (PCEs) OSCs rapidly improved now exceed 20%. However, there is significant lack focus on material stability device lifetime, causing severe hindrance commercial applications. In this review, we carefully review important strategies employed improve over past three years from perspectives design engineering. Furthermore, analyze discuss current progress terms air, light, thermal mechanical stability. Finally, propose future research directions overcome challenges achieving highly stable OSCs. We expect that will contribute solving problem OSCs, eventually paving way for applications near future.

Language: Английский

Citations

123
“N‐π‐N” Type Oligomeric Acceptor Achieves an OPV Efficiency of 18.19% with Low Energy Loss and Excellent Stability DOI
Lili Zhang, Ziqi Zhang, Dan Deng

et al.

Advanced Science, Journal Year: 2022, Volume and Issue: 9(23)

Published: June 16, 2022

A novel "N-π-N" type oligomeric acceptor of 2BTP-2F-T, constructed by two small non-fullerene (NFA) units linked with a thiophene π bridge is reported. The 2BTP-2F-T not only combines the advantages NFA and polymeric acceptors (PYF-T-o) similar but also exhibits superior characteristics high absorption coefficient electron moblity(µ

Language: Английский

Citations

114
Linker Engineering of Dimerized Small Molecule Acceptors for Highly Efficient and Stable Organic Solar Cells DOI
Jin‐Woo Lee,

Cheng Sun,

Changyeon Lee

et al.

ACS Energy Letters, Journal Year: 2023, Volume and Issue: 8(3), P. 1344 - 1353

Published: Feb. 8, 2023

High power conversion efficiency (PCE) and long-term stability are important requirements for commercialization of organic solar cells (OSCs). In this study, we demonstrate efficient (PCE = 18.60%) stable (t80% lifetime > 4000 h) OSCs by developing a series dimerized small-molecule acceptors (DSMAs). We prepared three different DSMAs (DYT, DYV, DYTVT) using linkers (i.e., thiophene, vinylene, thiophene– vinylene– thiophene), to connect their two Y-based building blocks. find that the crystalline properties glass transition temperature (Tg) can be systematically modulated linker selection. A DYV-based OSC achieves highest PCE (18.60%) among DSMA-based owing appropriate backbone rigidity leading an optimal blend morphology high electron mobility. Importantly, also demonstrates excellent operational under 1-sun illumination, i.e., t80% 4005 h.

Language: Английский

Citations

102
Geometry design of tethered small-molecule acceptor enables highly stable and efficient polymer solar cells DOI Creative Commons
Yang Bai, Ze Zhang, Qiuju Zhou

et al.

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: May 22, 2023

With the power conversion efficiency of binary polymer solar cells dramatically improved, thermal stability small-molecule acceptors raised main concerns on device operating stability. Here, to address this issue, thiophene-dicarboxylate spacer tethered are designed, and their molecular geometries further regulated via thiophene-core isomerism engineering, affording dimeric TDY-α with a 2, 5-substitution TDY-β 3, 4-substitution core. It shows that processes higher glass transition temperature, better crystallinity relative its individual acceptor segment isomeric counterpart TDY-β, more stable morphology donor. As result, based delivers 18.1%, most important, achieves an extrapolated lifetime about 35000 hours retaining 80% initial efficiency. Our result suggests proper geometry design, can achieve both high

Language: Английский

Citations

97
Unique assembly of giant star-shaped trimer enables non-halogen solvent-fabricated, thermal stable, and efficient organic solar cells DOI Creative Commons

Caixuan Wang,

Xiaoming Ma, Yifan Shen

et al.

Joule, Journal Year: 2023, Volume and Issue: 7(10), P. 2386 - 2401

Published: Sept. 20, 2023

Language: Английский

Citations

95
Tethered Small‐Molecule Acceptors Simultaneously Enhance the Efficiency and Stability of Polymer Solar Cells DOI Creative Commons

Shangyu Li,

Rui Zhang, Ming Zhang

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(2)

Published: Nov. 17, 2022

Abstract For polymer solar cells (PSCs), the mixture of donors and small‐molecule acceptors (SMAs) is fine‐tuned to realize a favorable kinetically trapped morphology thus commercially viable device efficiency. However, thermodynamic relaxation mixed domains within blend raises concerns related long‐term operational stability devices, especially in record‐holding Y‐series SMAs. Here, new class dimeric Y6‐based SMAs tethered with differential flexible spacers reported regulate their aggregation behavior. In blends PM6, it found that they favor an improved structural order relative Y6 counterpart. Most importantly, show large glass transition temperatures suppress domains. high‐performing blend, unprecedented open circuit voltage 0.87 V realized conversion efficiency 17.85%, while those regular Y6‐base devices only reach 0.84 16.93%, respectively. dimer‐based possesses substantially reduced burn‐in loss, retaining more than 80% initial after operating at maximum power point under continuous illumination for 700 h. The tethering approach provides direction develop PSCs high excellent stability.

Language: Английский

Citations

93
Giant Molecule Acceptor Enables Highly Efficient Organic Solar Cells Processed Using Non‐halogenated Solvent DOI

Hongmei Zhuo,

Xiaojun Li,

Jinyuan Zhang

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(26)

Published: April 26, 2023

High efficiency organic solar cells (OSCs) based on A-DA'D-A type small molecule acceptors (SMAs) were mostly fabricated by toxic halogenated solvent processing, and power conversion (PCE) of the non-halogenated processed OSCs is mainly restricted excessive aggregation SMAs. To address this issue, we developed two vinyl π-spacer linking-site isomerized giant (GMAs) with linking inner carbon (EV-i) or out (EV-o) benzene end group SMA longer alkyl side chains (ECOD) for capability solvent-processing. Interestingly, EV-i possesses a twisted molecular structure but enhanced conjugation, while EV-o shows better planar weakened conjugation. The OSC as acceptor o-xylene (o-XY) demonstrated higher PCE 18.27 % than that devices ECOD (16.40 %) (2.50 %). one highest PCEs among from solvents so far, benefitted suitable structure, stronger absorbance high charge carrier mobility EV-i. results indicate GMAs site would be excellent candidates fabricating performance solvents.

Language: Английский

Citations

87
Dimer Acceptor Adopting a Flexible Linker for Efficient and Durable Organic Solar Cells DOI
Qi Feng, Yanxun Li, Rui Zhang

et al.

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(21)

Published: March 22, 2023

Abstract Organic solar cells (OSCs) have advanced rapidly due to the development of new photovoltaic materials. However, long‐term stability OSCs still poses a severe challenge for their commercial deployment. To address this issue, dimer acceptor ( d T9TBO) with flexible linker is developed incorporation into small‐molecule acceptors form molecular alloy enhanced intermolecular packing and suppressed diffusion stabilize active layer morphology. Consequently, PM6 : Y6 T9TBO‐based device displays an improved power conversion efficiency (PCE) 18.41 % excellent thermal negligible decay after being aged at 65 °C 1800 h. Moreover, OSC also exhibits mechanical durability, maintaining 95 its initial PCE bended repetitively 1500 cycles. This work provides simple effective way fine‐tune stabilized morphology overcome trade‐off between stability.

Language: Английский

Citations

85