Volatile Solid‐Assisted Molecular Assembly Enables Eco‐Friendly Processed Organic Photovoltaic Cells with High Efficiency and Photostability DOI
Lei Xu,

Yaomeng Xiong,

Sunsun Li

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(17)

Published: Jan. 4, 2024

Achieving environmentally friendly solvent-processed high-performance organic photovoltaic cells (OPVs) is a crucial step toward their commercialization. Currently, OPVs with competitive efficiencies rely heavily on harmful halogenated solvent additives. Herein, the green and low-cost 9-fluorenone (9-FL) employed as solid additive. By using o-xylene/9-FL system, PM6:BTP-eC9-based devices deliver power-conversion of 18.6% 17.9% via spin-coating blade-coating respectively, outperforming all PM6:Y-series binary solvents. It found that addition 9-FL can regulate molecular assembly both PM6 BTP-eC9 in film-formation (molecule-level mixing) post-annealing (thermal-assisted reorganization additive volatilization) stages, so to optimize blend morphology. As result, charge transport ability donor acceptor phases are simultaneously enhanced, trap-assisted recombination reduced, which contributes higher short-circuit current density fill factor. Moreover, generation photo-induced traps significantly suppressed, resulting improved stability under illumination. further demonstrated excellent universality various photoactive systems, making it promising strategy advance development eco-friendly OPVs.

Language: Английский

In situandex situinvestigations on ternary strategy and co-solvent effects towards high-efficiency organic solar cells DOI
Ruijie Ma, Cenqi Yan, W.K. Fong

et al.

Energy & Environmental Science, Journal Year: 2022, Volume and Issue: 15(6), P. 2479 - 2488

Published: Jan. 1, 2022

High efficiencies for organic solar cells are achieved. Two different morphology change paths revealed with both in situ and ex measurements.

Language: Английский

Citations

123
High‐Performance Organic Solar Cells from Non‐Halogenated Solvents DOI
Di Wang,

Guanqing Zhou,

Yuhao Li

et al.

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 32(4)

Published: Oct. 12, 2021

Abstract High‐performance organic solar cells (OSCs) at the current stage are majorly accomplished from processing of halogenated solvents, such as chloroform, which will be constrained for upscale fabrication due to adverse health and environmental impacts. Therefore, exploring high‐performance OSCs non‐halogenated solvent becomes highly necessary, yet largely lagged behind. Herein, it is demonstrated can obtained hot spin different achieve highest reported efficiency so far. It revealed that phase evolution ternary blends during solution‐to‐solid transition has a correlation substrate temperature. With elevated temperature coating, optimal blend films secured in kinds solvents. As result, with excellent power conversion efficiencies 18.25% o ‐xylene, 18.20% p 18.12% toluene, respectively. To author's best knowledge, these results represent best‐performed made solvents

Language: Английский

Citations

122
Harnessing the Structure‐Performance Relationships in Designing Non‐Fused Ring Acceptors for Organic Solar Cells DOI
Amaresh Mishra, Ganesh D. Sharma

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

Published: Feb. 17, 2023

Abstract The prerequisite for commercially viable organic solar cells (OSC) is to reduce the efficiency‐stability‐cost gap. Therefore, cost of materials should be reduced by minimizing synthetic steps, yet maintaining molecular planarity and efficiencies achieved fused ring acceptors (FRA). In this respect, developing non‐fused (NFRA) with suitable functionalization favor conformational effective packing beneficial cost‐effective. Presently, power conversion efficiency (PCE) NFRAs around 16 %, lower than 19 % FRAs. Despite their potential, a thorough understanding structural design necessary efficient OSCs. This article pays special attention concept developed in last years analyzed approach toward improvement, an important step technological application.

Language: Английский

Citations

83
Random Terpolymer Enabling High‐Efficiency Organic Solar Cells Processed by Nonhalogenated Solvent with a Low Nonradiative Energy Loss DOI
Hao Lu,

Hang Wang,

Guangliu Ran

et al.

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(34)

Published: June 15, 2022

Abstract Three terpolymer donors (PL1, PL2, and PL3) employing repeating units of two popular photovoltaic polymers PM6 D18 are synthesized by random copolymerization. The terpolymers can reduce the regio‐regularity polymer backbones endow them with much‐enhanced solubility in nonhalogenated solvents such as o ‐xylene. Furthermore, along appearance temperature‐dependent aggregation behavior, indicating adaptability for fabricating organic solar cells (OSCs) eco‐friendly solvent processing. Among them, PL1‐based OSCs display higher more balanced hole electron mobilities, longer charge separation exciton lifetime, better dissociation collection capabilities than parent (PM6 D18) based ones. A power conversion efficiency 18.14% a very low energy loss is achieved on PL1, which much that (15.16%) (16.18%). result provides an effective way to realize high‐performance processing donor materials.

Language: Английский

Citations

76
High‐Performance n‐Type Organic Electrochemical Transistors Enabled by Aqueous Solution Processing of Amphiphilicity‐Driven Polymer Assembly DOI
Da-Hyun Jeong, Il‐Young Jo, Seungjin Lee

et al.

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(16)

Published: Jan. 4, 2022

Abstract Despite the growing attention on organic electrochemical transistors (OECTs), most research has focused design of p‐type active materials, and number high‐performance n‐type materials is limited. Herein, a series naphthalene diimide‐based polymers incorporated with asymmetrically branched oligo(ethylene glycol) (OEG) side chains are developed to enable green‐solvent‐processed, OECTs. The OEG afford sufficient solubility in eco‐friendly ethanol/water solvent mixtures. Importantly, taking advantage amphiphilic nature OEG‐based polymers, solvents selectively solvate hydrophilic chains, while producing assembled π−π stacks hydrophobic backbones. This enables highly ordered polymer packing preferential edge‐on orientation, thus excellent lateral charge transport. In particular, fine‐tuned P(NDIMTEG‐T) provide compact backbone packing, effective polaron generation, superior stability optimized swelling capability. resultant OECT shows best electrical/electrochemical performance family, represented by high transconductance ( g m ) 0.38 S cm −1 large figure‐of‐merit (µ C *) 0.56 F V s . study demonstrates use aqueous processing OECTs, for first time, suggests important guidelines mixed ionic‐electronic conductors characteristics.

Language: Английский

Citations

74
Introducing a Phenyl End Group in the Inner Side Chains of A‐DA'D‐A Acceptors Enables High‐Efficiency Organic Solar Cells Processed with Nonhalogenated Solvent DOI Open Access

Xiangxi Wu,

Xin Jiang, Xiaojun Li

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(48)

Published: July 29, 2023

Power conversion efficiency (PCE) of organic solar cells (OSCs) processed by nonhalogenated solvents is unsatisfactory due to the unfavorable morphology. Herein, two new small molecule acceptors (SMAs) Y6-Ph and L8-Ph are synthesized introducing a phenyl end group in inner side chains SMAs Y6 L8-BO, respectively, for overcoming excessive aggregation long-time film forming solvents. First, effect time on property photovoltaic performance Y6, Y6-Ph, studied using commonly used solvents: chloroform (CF) (rapid process) chlorobenzene (CB) (slow process). It found that Y6- L8-BO-based OSCs exhibit dramatic drop PCE from CF- CB-processed devices owing large phase separation, while based show obviously increased PCEs Furthermore, L8-Ph-based solvent o-xylene (o-XY) achieved high 18.40% with an FF 80.11%. The results indicate effective strategy modulate morphology improve

Language: Английский

Citations

47
Recent progress and prospects of dimer and multimer acceptors for efficient and stable polymer solar cells DOI Creative Commons
Jin‐Woo Lee, Jin Su Park,

Hyesu Jeon

et al.

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(9), P. 4674 - 4706

Published: Jan. 1, 2024

This review summarizes the recent progress, key design principles and prospects of dimer multimer acceptors for developing polymer solar cells (PSCs) with high efficiency long-term stability.

Language: Английский

Citations

45
Efficient all-small-molecule organic solar cells processed with non-halogen solvent DOI Creative Commons
Wei Gao, Ruijie Ma, Top Archie Dela Peña

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: March 2, 2024

Abstract All-small-molecule organic solar cells with good batch-to-batch reproducibility combined non-halogen solvent processing show great potential for commercialization. However, of all-small-molecule are rarely reported and its power conversion efficiencies very difficult to improve. Herein, we designed synthesized a small molecule donor BM-ClEH that can take advantage strong aggregation property induced by intramolecular chlorine-sulfur non-covalent interaction improve molecular pre-aggregation in tetrahydrofuran corresponding micromorphology after film formation. Tetrahydrofuran-fabricated based on BM-ClEH:BO-4Cl achieved high 15.0% binary device 16.1% ternary under thermal annealing treatment. In contrast, weakly aggregated BM-HEH without bond is almost inefficient same conditions due poor disordered π-π stacking, indistinct phase separation exciton dissociation. This work promotes the development provides further guidance.

Language: Английский

Citations

40
Progress of organic photovoltaics towards 20% efficiency DOI
Lei Zhu, Ming Zhang,

Zichun Zhou

et al.

Nature Reviews Electrical Engineering, Journal Year: 2024, Volume and Issue: 1(9), P. 581 - 596

Published: Aug. 21, 2024

Language: Английский

Citations

25
Ternary Strategy Enables Non‐Halogenated Solvent‐Processed All‐Polymer Solar Cells with High Efficiency Over 18% DOI
Jiabin Zhang,

Qiuman Zhou,

Juxuan Xie

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(21)

Published: Jan. 31, 2024

Abstract Herein, efficient ternary all‐polymer solar cells (all‐PSCs) are fabricated by employing PDEDTQ that possesses down‐shifted highest occupied molecular orbital (HOMO) level and blue‐shifted absorption with higher maximum coefficients compared the host donor JD40‐BDD20 as a guest into JD40‐BDD20:PA‐5 blend. The enhanced light‐harvesting energy transfer from to can be observed in device, which conduces improving short circuit current density ( J SC ). Additionally, shows relatively weak crystalline well miscibility JD40‐BDD20, meaning morphology tuned using PDEDTQ. Subsequently, more uniform fine‐divided network slightly weakened occurs blend film, implying intermixing domain of donor/acceptor (D/A) interfaces may formed. Thus, JD40‐BDD20:PA‐5, device obtained exciton dissociation charge extraction, reducing recombination loss E Ultimately, addition guaranteeing outstanding fill factor (FF), improve open voltage V OC ) achieved then boosted power conversion efficiency (PCE) 17.39% 18.47%, is one PCEs for all‐PSCs. Overall, this work provides guidance on forming high‐quality distribution D/A strategy, obtaining high‐efficiency all‐PSCs processed non‐halogenated solvent.

Language: Английский

Citations

23