Accomplishing High‐Performance Organic Solar Sub‐Modules (≈55 cm2) with >16% Efficiency by Controlling the Aggregation of an Engineered Non‐Fullerene Acceptor DOI Creative Commons
Thavamani Gokulnath, Hyerin Kim, Kakaraparthi Kranthiraja

et al.

Advanced Science, Journal Year: 2024, Volume and Issue: 11(31)

Published: June 18, 2024

Abstract The fabrication of environmentally benign, solvent‐processed, efficient, organic photovoltaic sub‐modules remains challenging due to the rapid aggregation current high performance non‐fullerene acceptors (NFAs). In this regard, design new NFAs capable achieving optimal in large‐area modules has not been realized. Here, an NFA named BTA‐HD‐Rh is synthesized with longer (hexyl‐decyl) side chains that exhibit good solubility and aggregation. Interestingly, integrating a minute amount (BTA‐HD‐Rh) into PM6:L8‐BO system enables improved halogen‐free solvents ( o ‐xylene:carbon disulfide O ‐XY:CS 2 )) controlled found. Then solar are fabricated at ambient condition (temperature 25 ± 3 °C humidity: 30–45%). Ultimately, champion 55 cm achieve exciting efficiency >16% solvents, which highest PCE reported for sub‐modules. Notably, doped very well correlated miscibility low Flory‐Huggins parameter (0.372), well‐defined nanoscale morphology, charge transport. This study demonstrates careful choice chain engineering offers fascinating features control overall active layer, results superior sub‐module environmental‐friendly solvents.

Language: Английский

π-Extended Nonfullerene Acceptor for Compressed Molecular Packing in Organic Solar Cells To Achieve over 20% Efficiency DOI
Yuandong Sun, Liang Wang,

Chuanhang Guo

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(17), P. 12011 - 12019

Published: April 19, 2024

Organic photovoltaics (OPVs) suffer from a trade-off between efficient charge transport and suppressed nonradiative recombination due to the aggregation-induced luminance quenching of organic semiconductors. To resolve this grand challenge, π-extended nonfullerene acceptor (NFA) B6Cl with large voids among honeycomb network is designed introduced into photovoltaic systems. We find that presence small amount (i.e., 0.5 or 1 wt %) can compress molecular packing host L8-BO, leading shortened π–π stacking distance 3.59 3.50 Å (that will improve transport) together ordered alkyl chain inhibit energy loss C–C C–H bonds vibrations), as validated by high-energy X-ray scattering measurements. This morphology transformation ultimately results in simultaneously improved JSC, FF, VOC OPVs. As result, maximum PCEs PM6:L8-BO D18:L8-BO are increased 19.1 19.3% 19.8 20.2%, respectively, which highest values for single-junction The university increase performance OPVs further evidenced range polymer:NFA

Language: Английский

Citations

245
Molecular interaction induced dual fibrils towards organic solar cells with certified efficiency over 20% DOI Creative Commons
Chen Chen, Liang Wang,

Weiyi Xia

et al.

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

Published: Aug. 10, 2024

The nanoscale fibrillar morphology, featuring long-range structural order, provides abundant interfaces for efficient exciton dissociation and high-quality pathways effective charge transport, is a promising morphology high performance organic solar cells. Here, we synthesize thiophene terminated non-fullerene acceptor, L8-ThCl, to induce the fibrillization of both polymer donor host that surpasses 20% efficiency milestone After adding original weak less continuous nanofibrils donors, i.e. PM6 or D18, are well enlarged refined, whilst acceptor L8-BO also assembles into with enhanced order. By adapting layer-by-layer deposition method, order can be retained significantly boost power conversion efficiency, specific values 19.4% 20.1% PM6:L8-ThCl/L8-BO:L8-ThCl D18:L8-ThCl/L8-BO:L8-ThCl devices, latter being certified 20.0%, which highest reported so far single-junction

Language: Английский

Citations

122
Optimizing Double‐Fibril Network Morphology via Solid Additive Strategy Enables Binary All‐Polymer Solar Cells with 19.50% Efficiency DOI
Jiali Song, Chao Li,

Haisheng Ma

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 16, 2024

Double-fibril network morphology (DFNM), in which the donor and acceptor can self-assemble into a double-fibril structure, is beneficial for exciton dissociation charge transport organic solar cells. Herein, it demonstrated that such DFNM be constructed optimized all-polymer cells (all-PSCs) with assistance of 2-alkoxynaphthalene volatile solid additives. It revealed incorporation induce stepwise regulation aggregation molecules during film casting thermal annealing processes. Through altering alkoxy additives, both intermolecular interactions molecular miscibility host materials precisely tuned, allows optimization process facilitation self-assembly, thus leading to reinforced packing DFNM. As result, an unprecedented efficiency 19.50% (certified as 19.1%) obtained 2-ethoxynaphthalene-processed PM6:PY-DT-X all-PSCs excellent photostability (T

Language: Английский

Citations

31
Over 19.2% efficiency of layer-by-layer organic photovoltaics enabled by a highly crystalline material as an energy donor and nucleating agent DOI

Hongyue Tian,

Yuheng Ni,

Wenqing Zhang

et al.

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(14), P. 5173 - 5182

Published: Jan. 1, 2024

By introducing highly crystalline material D18A into donor layer acting as energy and nucleating agent, an optimal PCE of 19.25% was achieved for PM1 : D18A/L8-BO based OPVs.

Language: Английский

Citations

30
Tuning of the Polymeric Nanofibril Geometry via Side-Chain Interaction toward 20.1% Efficiency of Organic Solar Cells DOI
Jing Zhou, Liang Wang, Chenhao Liu

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 2, 2024

Constructing fibril morphology has been believed to be an effective method of achieving efficient exciton dissociation and charge transport in organic solar cells (OSCs). Despite emerging endeavors on the fibrillization semiconductors via chemical structural design or physical manipulation, tuning geometry, i.e., width length, for tailored optoelectronic properties remains studied depth. In this work, a series alkoxythiophene additives featuring varied alkyl side chains connected thiophene are designed modulate growth aggregates cutting-edge polymer donors PM6 D18. Molecular dynamics simulations morphological characterizations reveal that these preferentially locate near entangle with donors, which enhance conjugated backbone stacking form nanofibrils expanding from 12.6 21.8 nm length increasing 98.3 232.7 nm. This nanofibril structure is feasible acquire simultaneously. By integrating L8-BO as donor acceptor layers pseudo-bulk heterojunction (p-BHJ) OSCs layer-by-layer deposition, improvement power conversion efficiency (PCE) 18.7% 19.8% observed, contributed by enhanced light absorption, transport, reduced recombination. The versatility also verified D18:L8-BO OSCs, PCE 19.3% 20.1%, among highest values reported OSCs.

Language: Английский

Citations

16
Synchronous Regulation of Donor and Acceptor Microstructure using Thiophene‐Derived Non‐Halogenated Solvent Additives for Efficient and Stable Organic Solar Cells DOI
Zhou Zhang, Qiaomei Chen, Cuifen Zhang

et al.

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

Published: March 29, 2024

Abstract Solvent additives are pivotal for enhancing the morphology, efficiency, and stability of organic solar cells (OSCs). However, widely used additive, 1,8‐diiodooctane (DIO), has drawbacks like harmful halogen content potential OSC degradation. To address these issues, novel non‐halogenated, thienyl‐alkyl‐thienyl structural solvent additives—DTP, DTH, DTN—featuring varying alkyl linker lengths (CH 2 ) 3 , 6 9 respectively introduced. Additives with longer linkers, DTH DTN, effectively dissolve strongly interact both donor polymer PM6 acceptor L8‐BO. This dual interaction enables precise tuning their microstructures, resulting in enhanced crystallinity. Upon incorporating as an additive OSCs (PM6:L8‐BO), a minimal voltage loss is observed, leading to impressive efficiency 18.51%, surpassing 17.90% achieved DIO. Furthermore, DTH‐based devices demonstrated superior photostability. In ternary blend system (PM6:D18‐Cl:L8‐BO), 19.07% attained, outperforming previous non‐halogenated additive‐based OSCs. employing processing combination toluene carbon disulfide, high PCE 18.82% achieved. These results underscore efficacy designing aromatic units, enabling tailored interactions acceptor, thereby presenting robust strategy optimizing performance stability.

Language: Английский

Citations

15
Effective N‐Doping of Non‐Fullerene Acceptor via Sequential Deposition Enables High‐Efficiency Organic Solar Cells DOI

Meiling Xie,

Lingyun Zhu, Jianqi Zhang

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(24)

Published: April 1, 2024

Abstract Charge transport in the active layer, which can be effectively modulated by molecular doping of organic semiconductors, significantly affects photovoltaic performance solar cells (OSCs). However, it is difficult to control dopant distribution bulk heterojunction (BHJ) films, hinders efficient OSCs. Herein, an effective n‐doping strategy developed via sequential deposition (SD) D18 donor and doped acceptor. The favorable vertical component SD films helps optimize carrier pathways. method confines n‐dopant N‐DMBI acceptor allowing positive effects doping. Consequently, device exhibits superior charge with suppressed recombination, lower trap density, enhanced extraction compared undoped one, resulting a high power conversion efficiency 19.55% for D18/L8‐BO binary In addition, does not affect thermal stability devices, retaining over 90% its initial after 1200 h heating at 80 °C. universality also verified other non‐fullerene systems. These results demonstrate great potential building high‐performance OSCs transport.

Language: Английский

Citations

9
Diluted Ternary Heterojunctions to Suppress Charge Recombination for Organic Solar Cells with 21% Efficiency DOI Open Access
Liang Wang, Chen Chen,

Zirui Gan

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 17, 2025

Abstract As an exitonic photovoltaic device, organic solar cells (OSCs) consist of electron donating and accepting components in their photoactive layer, which the molecular interactions between donor acceptor can significantly affect nanoscale morphology as well performance OSCs. In this work, by diluting with having opposite electrostatic potentials to promote structural order via strengthened intermolecular interactions, study shows that polymeric diluent is more effective due its long‐ranged conjugated backbone compared small diluent. The ternary heterojunction made C5‐16:L8‐BO binary acceptors diluted D18 strongest order, benefiting from strong L8‐BO C5‐16. enhanced within layer prepared layer‐by‐layer deposition p‐type n‐type heterojunctions contributes light absorption, improved charge transport, inhibited recombination. result, OSC based on (PY‐IT diluted)/L8‐BO:C5‐16 (D18 diluted) dual fibrils obtains unprecedented power conversion efficiency 21.0% (certified value 20.25%), one highest certified PCE up date.

Language: Английский

Citations

1
Dual Additive‐Assisted Layer‐by‐Layer Processing for 19.59% Efficiency Quasi‐Bulk Heterojunction Organic Solar Cells DOI Open Access

Fenghua Zhang,

Tingting Dai, Xiong Li

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 22, 2024

Abstract The ideal vertical phase separation active layer morphology is crucial for the photoelectric conversion of organic solar cells. In this work, a layer‐by‐layer sequential deposition method used to prepare D18/L8‐BO‐based cells and dual additives strategy adopted construct layer. Additive DIM regulates crystallization D18 layer, additive DIO induces L8‐BO diffuse into interior form composition distribution with large donor/acceptor interpenetrated regions. improvement induced by promote exciton generation dissociation, shorten charge transfer distance, improve carrier dynamics. With improved transport performance suppressed recombination, short‐circuit current density fill factor D18/L8‐BO quasi‐bulk heterojunction are simultaneously, power efficiency boosted significantly from 18.21% 19.59%. Moreover, photovoltaic further verified in D18/Y6 PM6/L8‐BO‐based cells, which implies generalizability additive‐assisted ‐sequential method.

Language: Английский

Citations

8
Low‐Temperature Processed Efficient and Reproducible Blade‐Coating Organic Photovoltaic Devices with γ‐Position Branched Inner Side Chains‐Containing Nonfullerene Acceptor DOI Creative Commons

Donghoo Won,

So‐Huei Kang, Jaeyeong Park

et al.

Small Science, Journal Year: 2024, Volume and Issue: 4(7)

Published: April 15, 2024

Recent advancements in blade‐coating organic photovoltaic (OPV) devices utilizing eco‐friendly nonhalogenated solvents have demonstrated high power conversion efficiencies (PCEs) when processed at substrate temperatures. However, this method poses challenges device reproducibility and stability. Herein, a BTP‐eC9‐ γ nonfullerene acceptor (analogous to BTP‐eC9) with ‐position‐branched inner side chains within the BTP‐eC9‐based structural motif is developed. This pin‐sized extension branching position enhances solubility of toluene solvent. improvement not only mitigates excessive aggregation film state but also facilitates fabrication lower Optimized temperature 40 °C, ‐based achieve remarkable PCEs 16.43% (0.04 cm 2 ) 14.95% (1.0 ). Furthermore, these retain their uniformity which contributes superior reproducibility. attributed minimized alteration evolution kinetics fluid flow. These findings signify promising direction for industrial production OPV devices.

Language: Английский

Citations

6