A New Polymer Donor Enables Binary All‐Polymer Organic Photovoltaic Cells with 18% Efficiency and Excellent Mechanical Robustness

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(35)

Published: July 15, 2022

The development of polymerized small-molecule acceptors has boosted the power conversion efficiencies (PCEs) all-polymer organic photovoltaic (OPV) cells to 17%. However, polymer donors suitable for OPV are still lacking, restricting further improvement their PCEs. Herein, a new donor named PQM-Cl is designed and its performance explored. negative electrostatic potential low average local ionization energy distribution surface enable efficient charge generation transfer process. When blending with well-used acceptor, PY-IT, PQM-Cl-based devices deliver an impressive PCE 18.0% superior fill factor 80.7%, both which highest values cells. relevant measurements demonstrate that films possess excellent mechanical flexible properties. As such, fabricated 16.5% high stability displayed. These results candidate provide insights into design high-efficient

Language: Английский

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Revealing the underlying solvent effect on film morphology in high-efficiency organic solar cells through combinedex situandin situobservations

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(5), P. 2316 - 2326

Published: Jan. 1, 2023

Here the aggregation behavior differences induced by solvent–material and material–material interactions are clearly revealed combined ex situ in morphology characterization studies on representative high-efficiency OPV systems.

Language: Английский

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High‐Efficiency and Mechanically Robust All‐Polymer Organic Photovoltaic Cells Enabled by Optimized Fibril Network Morphology

Advanced Materials, Journal Year: 2022, Volume and Issue: 35(9)

Published: Dec. 20, 2022

All-polymer organic photovoltaic (OPV) cells possessing high performance and mechanical robustness are promising candidates for flexible wearable devices. However, developing photoactive materials with good properties so far remains challenging. In this work, a polymer donor PBDB-TF weight-average molecular weight (Mw ) is introduced to enable highly efficient all-polymer OPV featuring excellent reliability. By incorporating the high-Mw as third component into PBQx-TF:PY-IT blend, bulk heterojunction morphology finely tuned more compact π-π stacking distance, affording pathways charge transport well stress dissipation. Hence, based on ternary blend film demonstrate maximum power conversion efficiency (PCE) of 18.2% an outstanding fill factor 0.796. The cell delivers decent PCE 16.5% stability. These results present strategy address boost cells.

Language: Английский

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Unveiling the Morphological and Physical Mechanism of Burn‐in Loss Alleviation by Ternary Matrix Toward Stable and Efficient All‐Polymer Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(18)

Published: Feb. 10, 2023

All-polymer solar cells (All-PSCs) are considered the most promising candidate in achieving both efficient and stable organic photovoltaic devices, yet field has rarely presented an in-depth understanding of corresponding device stability while efficiency is continuously boosted via innovation polymer acceptors. Herein, a ternary matrix built for all-PSCs with optimized morphology, improved film ductility importantly, better operational than its parental binary counterparts, as platform to study underlying mechanism. The target system PQM-Cl:PTQ10:PY-IT (0.8:0.2:1.2) exhibits alleviated burn-in loss morphology under light soaking, which supports promoted lifetime. comprehensive characterizations fresh light-soaked active layers lead clear illustration opposite morphological physical degradation direction PQM-Cl PTQ10, thus resulting delicate balance at optimal system. Specifically, enlarging tendency shrinking preference PTQ10 terms phase separation leads their mixing phase; hole transfer kinetics PQM-Cl:PY-IT host stabilized by incorporating PTQ10. This work succeeds reaching deep insight into all-PSC's promotion rational design, booms prospect gaining high-performance all-PSCs.

Language: 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, Journal Year: 2023, Volume and Issue: 35(36)

Published: May 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.

Language: Английский

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

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(8)

Published: Oct. 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

Language: Английский

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

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(11), P. 5052 - 5064

Published: Jan. 1, 2023

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

Language: Английский

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All-polymer solar cells with 19% efficiency via introducing pincer-shaped non-covalent bond interactions

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(12), P. 4216 - 4227

Published: Jan. 1, 2024

Pincer-shaped non-covalent bond interactions are introduced between a small-molecule additive and polymer acceptor, effectively improving the photovoltaic performance mechanical stability of all-polymer solar cells.

Language: Английский

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Dimerized Acceptors with Conjugate‐Break Linker Enable Highly Efficient and Mechanically Robust Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(22)

Published: March 26, 2024

Abstract Designing new acceptors is critical for intrinsically stretchable organic solar cells (IS‐OSCs) with high efficiency and mechanical robustness. However, nearly all polymer exhibit limited high‐performance small molecular are very brittle. In this regard, we select thienylene‐alkane‐thienylene (TAT) as the conjugate‐break linker synthesize four dimerized by regulation of connecting sites halogen substitutions. It found that substitutions considerably impact overall electronic structures, aggregation behaviors, charge transport properties. Benefiting from optimization structure, acceptor exhibits rational phase separation within blend films, which significantly facilitates exciton dissociation while effectively suppressing recombination processes. Consequently, FDY‐m‐TAT‐based rigid OSCs render highest power conversion (PCE) 18.07 % among reported containing linker. Most importantly, IS‐OSCs achieve PCE (14.29 %) remarkable stretchability (crack‐onset strain [COS]=18.23 %), surpassing Y6‐based counterpart (PCE=12.80 COS=8.50 %). To sum up, these findings demonstrate linkers have immense potential in developing highly efficient mechanically robust OSCs.

Language: Английский

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

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(18)

Published: Feb. 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.

Language: Английский

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