Achieving Record‐High Stretchability and Mechanical Stability in Organic Photovoltaic Blends with a Dilute‐absorber Strategy

Advanced Materials, Год журнала: 2023, Номер 36(8)

Опубликована: Окт. 22, 2023

Organic solar cells (OSCs) have potential for applications in wearable electronics. Except high power conversion efficiency (PCE), excellent tensile properties and mechanical stability are required achieving high-performance OSCs, while the present metrics barely meet stretchable requirements. Herein, this work proposes a facile low-cost strategy constructing intrinsically OSCs by introducing readily accessible polymer elastomer as diluent all-polymer photovoltaic blends. Remarkably, record-high stretchability with fracture strain of up to 1000% elastic recovery >90% under cyclic tests realized active layers first time. Specifically, best-performing blends increased 250 times after blending. Previously unattainable performance (fracture >50% PCE >10%) achieved simultaneously resulting films. Furthermore, an overall evaluation parameter y is proposed efficiency-cost- balance blend The value dilute-absorber system two orders magnitude greater than those prior state-of-the-art systems. Additionally, devices prepared showcase stability. Overall, offers new avenue comprehensively evaluating organic electronic

Язык: Английский

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Enabling Highly Efficient and Thermal‐Stable Polymer Solar Cells through Semi‐Alloy Acceptors Composed of a Hinge‐Like Dimer: A Versatile Doping Protocol

Advanced Materials, Год журнала: 2023, Номер 35(36)

Опубликована: Май 22, 2023

Abstract The simultaneous improvement of power conversion efficiency (PCE) and thermal stability is a critical scientific challenge in advancing the commercial applications polymer solar cells. To address this challenge, dumbbell‐shaped dimeric acceptor, DT19, successfully designed synthesized. It incorporated as third component into PM1:BTP‐eC9 system. This ternary strategy demonstrates synergistic enhancement PCE host binary In particular, PM1:BTP‐eC9:DT19 system maintains over 90% even after heating at 120 °C for 200 h. Additionally, dimer‐doping exhibits excellent generality other four Y‐series systems outperforms containing alloy‐like acceptors terms stability. because with its hinge‐like structure, can form semi‐alloy acceptor leading to strong interchain entanglement donor, thus overcoming phase separation excessive aggregation under stress. new type material, which synergistically enhance device active layers, presents promising application prospects.

Язык: Английский

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Oligomeric Acceptor Enables High‐Performance and Robust All‐Polymer Solar Cells with 17.4% Efficiency

Advanced Energy Materials, Год журнала: 2023, Номер 13(20)

Опубликована: Апрель 6, 2023

Abstract Developing efficient and stable all‐polymer solar cells (all‐PSCs) has received increasing attention because of their mechanical robustness for flexible devices. Based on the CH‐series small molecule acceptors, a new polymer acceptor (PZC24) is reported obtains decent power conversion efficiency (PCE) 16.82% when blended with PM6. To further improve performance, an oligomeric (CH‐D1), which possesses same backbone structure as PZC24, proposed synthesized third component all‐PSC system. The creative strategy improves crystallinity molecular packing, can maintain charge transport channels all‐PSCs binary Therefore, PM6:PZC24:CH‐D1 based ternary devices exhibit impressive PCE 17.40%, among highest value all‐PSCs. Compared to PM6:PZC24, device exhibits enhanced photosoaking stability thermal stability, simultaneously. In addition, introduction does not weaken As such, display excellent 15.35%. Importantly, this shows universality in PM6:PY‐IT PM6:PY‐V‐γ improved PCEs over 17%. results provide feasible simultaneously photovoltaic herald bright future

Язык: Английский

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Correlating miscibility, mechanical parameters, and stability of ternary polymer blends for high-performance solar cells

Energy & Environmental Science, Год журнала: 2023, Номер 16(11), С. 5052 - 5064

Опубликована: Янв. 1, 2023

The established miscibility–function relationships are helpful to predict mechanical properties and stability in organic photovoltaic devices based on multicomponent systems.

Язык: Английский

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Advances in Stretchable Organic Photovoltaics: Flexible Transparent Electrodes and Deformable Active Layer Design

Advanced Materials, Год журнала: 2024, Номер 36(37)

Опубликована: Май 30, 2024

Stretchable organic photovoltaics (OPVs) have attracted significant attention as promising power sources for wearable electronic systems owing to their superior robustness under repetitive tensile strains and good compatibility. However, reconciling a high power-conversion efficiency reasonable flexibility is tremendous challenge. In addition, the development of stretchable OPVs must be accelerated satisfy increasing requirements niche markets mechanical robustness. OPV devices can classified either structurally or intrinsically stretchable. This work reviews recent advances in OPVs, including design mechanically robust transparent electrodes, photovoltaic materials, devices. Initially, an overview characteristics research progress areas provided. Subsequently, into flexible electrodes that directly affect performances summarized analyzed. Overall, this review aims provide in-depth understanding intrinsic properties highly efficient deformable active while also emphasizing advanced strategies simultaneously improving performance layer, material design, multi-component settings, structural optimization.

Язык: Английский

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Sequentially Deposited Elastomer‐Based Ternary Active Layer for High‐Performance Stretchable Organic Solar Cells

Advanced Functional Materials, Год журнала: 2024, Номер 34(22)

Опубликована: Фев. 6, 2024

Abstract Stretchable organic solar cells (OSCs) with high power conversion efficiency and good mechanical deformation are promising as sources for wearable electronics. However, synergistic improvement of both photovoltaic ductility is challenging state‐of‐the‐art polymer donor: non‐fullerene acceptor (NFA)‐based active layers. Here, a high‐performance stretchable OSC 16.54% crack‐onset strain 26.38% by synergetic optimization film microstructure sequentially deposited ternary layer consisting donor poly[2,6‐(4,8‐bis(5‐(2‐ethylhexyl‐3‐fluoro)thiophen‐2‐yl)‐benzo[1,2‐b:4,5‐b']dithiophene))‐alt‐5,5'‐(5,8‐bis(4‐(2‐butyloctyl)thiophen‐2‐yl)dithieno[3',2':3,4;2'',3'':5,6]benzo[1,2‐c][1,2,5]thiadiazole)] (D18), an NFA 2,2'‐((2Z,2'Z)‐((12,13‐bis(2‐ethylhexyl)‐3,9‐diundecyl‐12,13‐dihydro‐[1,2,5]thiadiazolo[3,4‐e]thieno[2'',3'':4',5']thieno[2',3':4,5]pyrrolo[3,2‐g]thieno[2',3':4,5]thieno[3,2‐b]indole‐2,10‐diyl)bis(methanylylidene)bis(5,6‐difluoro‐3‐oxo‐2,3‐dihydro‐1H‐indene‐2,1‐diylidene))dimalonitrile) (Y6), elastomer polystyrene‐block‐poly(ethylene‐ran‐butylene)‐block‐polystyrene (SEBS) reported. Adding low‐content solvent additive para‐xylene into main carbon disulfide induces high‐density fibers networks low crystallinity in bottom D18 layer, this further suppresses the large phase separation between Y6 SEBS top layer. Moreover, incorporating solid 1,3‐dibromo‐5‐chlorobenzene better compatibility can promote dispersions to form smaller ordered domains matrix. Finally, optimal shows significantly higher stretchability, resulting efficiency‐stretchability factor 4.36%, which among best values OSCs.

Язык: Английский

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Unveiling the Strain‐induced Microstructural Evolution and Morphology‐Stretchability Correlations of Intrinsically Stretchable Organic Photovoltaic Films

Advanced Energy Materials, Год журнала: 2024, Номер 14(18)

Опубликована: Фев. 9, 2024

Abstract The progress of stretchable and wearable photovoltaics relies heavily on intrinsically active layer films. Nevertheless, there is a paucity research clarifying the connections between their microstructure, performance, adaptation to large strain in polymer electronic current study utilizes multiple synchrotron X‐ray scattering methods collectively examine correlations morphology stretchability, as well microstructural evolution induced by stretching three sample cases highly ternary blend These blends contain over 30% weight elastomer, such styrene‐ethylene‐butylene‐styrene block copolymer, integrated into high‐performance polymer:nonfullerene small molecule mixture. Specifically, real‐time changes these durable organic photovoltaic films with elastomers are monitored when subjected tensile through situ scattering. experiments demonstrate that polymeric can effectively lower degree crystallinity deform crystallites semiconductor molecules. elastomeric component aids stress dispersion during stretching, thereby improving durability This provides new recommendations for advancing optoelectronic devices.

Язык: Английский

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Recent advances in intrinsically stretchable electronic materials and devices

Deleted Journal, Год журнала: 2024, Номер 2(1)

Опубликована: Янв. 22, 2024

Abstract Intrinsically stretchable electronics have gained extensive interest recently, due to their promising application in wearable electronics, bio‐integrated and healthcare devices. All of the components such need be mechanically robust accommodate complex movements. The design fabrication intrinsically electronic materials represent a critical challenge this emerging field. In review, we focus on latest studies covering strategies for achieving materials, recent progresses key including conductors, semiconductors, dielectrics, devices produced by them. Finally, some suggestions prospects future development are proposed.

Язык: Английский

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Polymer‐Entangled Spontaneous Pseudo‐Planar Heterojunction for Constructing Efficient Flexible Organic Solar Cells

Advanced Materials, Год журнала: 2023, Номер 36(7)

Опубликована: Окт. 30, 2023

Abstract Flexible organic solar cells (FOSCs) have attracted considerable attention from researchers as promising portable power sources for wearable electronic devices. However, insufficient conversion efficiency (PCE), intrinsic stretchability, and mechanical stability of FOSCs remain severe obstacles to their application. Herein, an entangled strategy is proposed the synergistic optimization PCE properties through green sequential printing combined with polymer‐induced spontaneous gradient heterojunction phase separation morphology. Impressively, toughened‐pseudo‐planar (Toughened‐PPHJ) film exhibits excellent tensile a crack onset strain (COS) 11.0%, twice that reference bulk (BHJ) (5.5%), which among highest values reported state‐of‐the‐art polymer/small molecule‐based systems. Finite element simulation stress distribution during bending confirms Toughened‐PPHJ can release residual well. Therefore, this optimal device shows high (18.16%) enhanced (short‐circuit current density) J SC suppressed energy loss, significant improvement over conventional BHJ (16.99%). Finally, 1 cm 2 flexible retains more than 92% its initial (13.3%) after 1000 cycles. This work provides feasible guiding idea future supplies.

Язык: Английский

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Passive Photovoltaic Cooling: Advances Toward Low‐Temperature Operation

Advanced Energy Materials, Год журнала: 2023, Номер 14(2)

Опубликована: Ноя. 27, 2023

Abstract With the great increase in installation, photovoltaics will develop as main power supply source for world shortly. However, actual generation and lifetime of are greatly compromised by high working temperature under outdoor operation. In this review, recent advances four promising passive photovoltaic cooling methods summarized with aim to uncover their principles, performance, application potential devices. For radiative cooling, light management strategies ultraviolet‐photon downshift sub‐bandgap reflection discussed detail reveal reducing enhancing generation. Subsequently, benefits evaporative underlined terms its superior drop Moreover, integrated strategy is further highlighted due electricity production fresh water supply. Most crucially, remaining challenges authors'r insights presented advance commercial applications photovoltaics.

Язык: Английский

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