Non‐ionic Perylene‐Diimide Polymer as Universal Cathode Interlayer for Conventional, Inverted, and Blade‐Coated Organic Solar Cells DOI Open Access

Luxin Feng,

Yanhe Xiang,

Zhe Li

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Июль 29, 2024

Abstract As a class of predominantly used cathode interlayers (CILs) in organic solar cells (OSCs), perylene‐diimide (PDI)‐based polymers exhibit intriguing characteristics excellent charge transporting capacity and suitable energy levels. Despite that, PDI‐based CILs with satisfied film‐forming ability adequate solvent resistance are rather rare, which not only limits the further advance OSC performances but also hinders practical use PDI CILs. Herein, we designed synthesized two non‐conjugated for achieving high power conversion efficiency (PCE) diverse types OSCs. The utilization oligo (ethylene glycol) (OEG) linkage enhanced n‐doping effect polymers, leading to an improved CIL reduce work function improve electron capability. Moreover, introduction non‐ionic OEG chain effectively wetting property so PPDINN can withstand processing conditions fabricating different OSCs, including conventional, inverted blade‐coated devices. binary conventional structure using showed PCE 18.6 %, along device stability. Besides, is compatible large‐area blade‐coating technique, 16.6 % was achieved 1‐cm 2 where used.

Язык: 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

и другие.

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(17), С. 12011 - 12019

Опубликована: Апрель 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

Язык: Английский

Процитировано

259
π–π Stacking Modulation via Polymer Adsorption for Elongated Exciton Diffusion in High‐Efficiency Thick‐Film Organic Solar Cells DOI

Zhen Fu,

Jiawei Qiao,

Fengzhe Cui

и другие.

Advanced Materials, Год журнала: 2024, Номер 36(21)

Опубликована: Фев. 22, 2024

Abstract Developing efficient organic solar cells (OSCs) with thick active layers is crucial for roll‐to‐roll printing. However, thicker often result in lower efficiency. This study tackles this challenge using a polymer adsorption strategy combined layer‐by‐layer approach. Incorporating insulator polystyrene (PS) into the PM6:L8‐BO system creates PM6+PS:L8‐BO blends, effectively suppressing trap states and extending exciton diffusion length mixed donor domain. Adding insulating polymers benzene rings to enhances π–π stacking of donors, boosting intermolecular interactions electron wave function overlap. results more orderly molecular stacking, longer lifetimes, higher lengths. The promoted long‐range leads high power conversion efficiencies 19.05% 18.15% blend films 100 300 nm thickness, respectively, as well respectable 16.00% 500 nm. These insights guide material selection better diffusion, offer method thick‐film OSC fabrication, promoting prosperous future practical mass production.

Язык: Английский

Процитировано

43
A high-efficiency and stable organic solar cell with balanced crystallization kinetics DOI
Weichao Zhang,

Yaochang Yue,

Rongsheng Yang

и другие.

Energy & Environmental Science, Год журнала: 2024, Номер 17(6), С. 2182 - 2192

Опубликована: Янв. 1, 2024

In this work, we present a conceptual strategy based on multi-acceptor components to realize balanced crystallization kinetics in organic solar cells (OSC) that deliver 19.35% power conversion efficiency with superior photostability.

Язык: Английский

Процитировано

28
Efficient Dual Mechanisms Boost the Efficiency of Ternary Solar Cells with Two Compatible Polymer Donors to Exceed 19% DOI
Shizhao Liu, Junjie Wang, Shuguang Wen

и другие.

Advanced Materials, Год журнала: 2024, Номер 36(21)

Опубликована: Фев. 9, 2024

Abstract Ternary strategyopens a simple avenue to improve the power conversion efficiency (PCE) of organic solar cells (OSCs). The introduction wide bandgap polymer donors (PDs) as third component canbetter utilize sunlight and mechanical thermal stability active layer. However, efficient ternary OSCs (TOSCs) with two PDs are rarely reported due inferior compatibility shortage match acceptors. Herein, PDs‐(PBB‐F PBB‐Cl) adopted in dual‐PDs systems explore underlying mechanisms their photovoltaic performance. findings demonstrate that components exhibit excellent miscibility PM6 embedded host donor form alloy‐like phase. A more profound mechanism for enhancing through dual mechanisms, guest energy transfer charge transport at donor/acceptor interface, has been proposed. Consequently, PM6:PBB‐Cl:BTP‐eC9 TOSCs achieve PCE over 19%. Furthermore, better than binary reduction spatial site resistance resulting from tightly entangled long‐chain structure. This work not only provides an effective approach fabricate high‐performance TOSCs, but also demonstrates importance developing compatible PD materials.

Язык: Английский

Процитировано

27
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

и другие.

Journal of the American Chemical Society, Год журнала: 2024, Номер unknown

Опубликована: Дек. 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.

Язык: Английский

Процитировано

23
Regulating Electron‐Phonon Coupling by Solid Additive for Efficient Organic Solar Cells DOI

Zhongwei Ge,

Jiawei Qiao,

Yun Li

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 64(1)

Опубликована: Авг. 30, 2024

Strong electron-phonon coupling can hinder exciton transport and induce undesirable non-radiative recombination, resulting in a shortened diffusion distance constrained dissociation organic solar cells (OSCs). Therefore, suppressing is crucially important for achieveing high-performance OSCs. Here, we employ the solid additive to regulating The planar configuration of SA1 confers significant advantage lattice vibrations active layers, reducing scattering excitons by phonons. Consequently, slow but sustained hole transfer process identified SA1-assisted film, indicating an enhancement efficiency. Prolonged length lifetime are achieved blend film processed with SA1, attributed low recombination rate energetic disorder charge carrier transport. As result, high efficiency 20 % was ternary device remarkable short-circuit current. This work highlights role improving photovoltaic performance

Язык: Английский

Процитировано

13
Achieving High Fill Factor in Organic Photovoltaic Cells by Tuning Molecular Electrostatic Potential Fluctuation DOI
Guanlin Wang, Jingwen Wang, Yong Cui

и другие.

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(17)

Опубликована: Март 7, 2024

Abstract In the field of organic photovoltaics (OPVs), significant progress has been made in tailoring molecular structures to enhance open‐circuit voltage and short‐circuit current density. However, there remains a crucial gap development coordinated material design strategies focused on improving fill factor (FF). Here, we introduce strategy that incorporates electrostatic potential fluctuation photovoltaic materials. By reducing amplitude IT‐4F, synthesized new acceptor named ITOC6‐4F. When using PBQx‐TF as donor, ITOC6‐4F‐based cell shows markedly low recombination rate constant 0.66×10 −14 cm 3 s −1 demonstrates an outstanding FF 0.816, both which are records for binary OPV cells. Also, find small could decrease energetic disorder cells, energy loss. Finally, creates highest efficiency 16.0 % among medium‐gap Our work holds vital implication guiding high‐performance

Язык: Английский

Процитировано

12
Modulation of charge migration and ink flow dynamics exceeding 19% efficiency for blade-coating pseudo-planar heterojunction organic solar cells DOI

Houdong Mao,

Jiahua Zhang,

Xin Cen

и другие.

Energy & Environmental Science, Год журнала: 2024, Номер 17(18), С. 6799 - 6810

Опубликована: Янв. 1, 2024

This work presents a novel charge migration strategy to efficiently engineer active layer morphology for PPHJ OSCs by firstly integrating SBC with NIL technique, which can improve transport/collection and phase separation behavior.

Язык: Английский

Процитировано

12
Diluted Ternary Heterojunctions to Suppress Charge Recombination for Organic Solar Cells with 21% Efficiency DOI Open Access
Liang Wang, Chen Chen,

Zirui Gan

и другие.

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Фев. 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.

Язык: Английский

Процитировано

2
Effective N‐Doping of Non‐Fullerene Acceptor via Sequential Deposition Enables High‐Efficiency Organic Solar Cells DOI

Meiling Xie,

Lingyun Zhu, Jianqi Zhang

и другие.

Advanced Energy Materials, Год журнала: 2024, Номер 14(24)

Опубликована: Апрель 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.

Язык: Английский

Процитировано

9