Co‐assembled Monolayers as Hole‐Selective Contact for High‐Performance Inverted Perovskite Solar Cells with Optimized Recombination Loss and Long‐Term Stability

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(30)

Опубликована: Май 13, 2022

Self-assembled monolayers (SAMs) have been widely employed as an effective way to modify interfaces of electronic/optoelectronic devices. To achieve a good control the growth and molecular functionality SAMs, we develop co-assembled monolayer (co-SAM) for obtaining efficient hole selection suppressed recombination at hole-selective interface in inverted perovskite solar cells (PSCs). By engineering position methoxy substituents, aligned energy level favorable dipole moment can be obtained our newly synthesized SAM, ((2,7-dimethoxy-9H-carbazol-9-yl) methyl) phosphonic acid (DC-PA). An alkyl ammonium containing SAM is further optimize surface functionalization interaction with layer on top. A champion device excellent power conversion efficiency (PCE) 23.59 % improved stability are achieved. This work demonstrates advantage using co-SAM improving performance PSCs.

Язык: Английский

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A 19% efficient and stable organic photovoltaic device enabled by a guest nonfullerene acceptor with fibril-like morphology

Energy & Environmental Science, Год журнала: 2023, Номер 16(3), С. 1062 - 1070

Опубликована: Янв. 1, 2023

A nonfullerene acceptor, isoIDITC, capable of exhibiting fibril-like morphology, is utilized as a third component in organic photovoltaic devices. power conversion efficiency 19% achieved ternary PM6:BTP-eC9:isoIDITC bulk-heterojunction

Язык: Английский

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19.28% Efficiency and Stable Polymer Solar Cells Enabled by Introducing an NIR‐Absorbing Guest Acceptor

Advanced Functional Materials, Год журнала: 2023, Номер 33(8)

Опубликована: Янв. 6, 2023

Abstract Here, a near‐infrared (NIR)‐absorbing small‐molecule acceptor (SMA) Y‐SeNF with strong intermolecular interaction and crystallinity is developed by combining selenophene‐fused core naphthalene‐containing end‐group, then as custom‐tailor guest incorporated into the binary PM6:L8‐BO host system. shows 65 nm red‐shifted absorption compared to L8‐BO. Thanks of Y‐SeNF, morphology PM6:L8‐BO:Y‐SeNF can be precisely regulated introducing achieving improved charge‐transporting suppressed non‐radiative energy loss. Consequently, ternary polymer solar cells (PSCs) offer an impressive device efficiency 19.28% both high photovoltage (0.873 V) photocurrent (27.88 mA cm −2 ), which one highest efficiencies in reported single‐junction PSCs. Notably, PSC has excellent stability under maximum‐power‐point tracking for even over 200 h, better than its parental devices. The study provides novel strategy construct NIR‐absorbing SMA efficient stable PSCs toward practical applications.

Язык: Английский

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Importance of structural hinderance in performance–stability equilibrium of organic photovoltaics

Nature Communications, Год журнала: 2022, Номер 13(1)

Опубликована: Окт. 8, 2022

Power conversion efficiency and long-term stability are two critical metrics for evaluating the commercial potential of organic photovoltaics. Although field has witnessed a rapid progress towards 19%, intrinsic trade-off between is still challenging issue bulk-heterojunction cells due to very delicate crystallization dynamics species. Herein, we developed class non-fullerene acceptors with varied side groups as an alternative aliphatic chains. Among them, conjugated show larger side-group torsion more twisted backbone, however, they can deliver high 18.3% in xylene-processed cells, which among highest values reported non-halogenated solvent processed cells. Meanwhile, decent thermal/photo realized these containing groups. Through investigation geometry-performance-stability relationship, highlight importance steric hinderance achieving combined high-performance, stable, eco-friendly

Язык: Английский

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Recent Developments of Polymer Solar Cells with Photovoltaic Performance over 17%

Advanced Functional Materials, Год журнала: 2023, Номер 33(14)

Опубликована: Янв. 22, 2023

Abstract With the emergence of ADA'DA‐type (Y‐series) non‐fullerene acceptors (NFAs), power conversion efficiencies (PCEs) organic photovoltaic devices have been constantly refreshed and gradually reached 20% in recent years (19% for single junction tandem device). The possess specific design concept, which greatly enrich NFA types excellent compatibility with many donor materials. It is gratifying to note that previously underperforming materials combine these regulated shine again. Nowadays, concept modular widely used research donors, injecting new vitality into field photovoltaics. Furthermore, also promote multicomponent devices, bilayer processing solvent engineering, additive engineering. Herein, latest progresses polymer solar cells efficiency over 17% are briefly reviewed from aspects active material design, interface development, device technology. At last, opportunities challenges commercialization future discussed.

Язык: Английский

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A Random Terpolymer Donor with Similar Monomers Enables 18.28% Efficiency Binary Organic Solar Cells with Well Polymer Batch Reproducibility

ACS Energy Letters, Год журнала: 2022, Номер 7(9), С. 3045 - 3057

Опубликована: Авг. 19, 2022

Herein, by using two fluorinated and chlorinated monomers with similar structures in different molar ratios dithieno[3′,2′:3,4;2″,3″:5,6]benzo[1,2-c][1,2,5]thiadiazole (DTBT) as the third unit, a family of polymer donors D18, D18–20%Cl, D18–40%Cl, D18–Cl are synthesized for OSCs. With appropriate monomer proportion, terpolymer D18–20%Cl exhibits proper HOMO energy level higher packing density compared that other control polymers. Moreover, D18–20%Cl:Y6 blend films have favorable morphology better face-on crystallization charge transport. Consequently, D18–20%Cl:Y6-based OSCs obtain top-ranked PCE 18.28% overall improved device parameters to controlled D18:Y6 or D18-Cl:Y6-based (17.50% 17.02%), which represents highest reported terpolymer-based binary Notably, exhibit over 17% efficiency wide molecular weight range. These results demonstrate ternary copolymerization DTBT moieties is an efficient approach achieving well batch-to-batch reproducibility.

Язык: Английский

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Versatile organic photovoltaics with a power density of nearly 40 W g⁻¹

Energy & Environmental Science, Год журнала: 2023, Номер 16(5), С. 2284 - 2294

Опубликована: Янв. 1, 2023

Ultra-thin OPVs with record efficiency, the highest power density and tunable colors are demonstrated. The was fabricated on a 1.3 micro-meter substrate, demonstrated efficiency of 17.32% an excellent 39.72 W g −1 .

Язык: Английский

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Ultra Robust and Highly Efficient Flexible Organic Solar Cells with Over 18 % Efficiency Realized by Incorporating a Linker Dimerized Acceptor

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(41)

Опубликована: Авг. 24, 2023

The wearable application of flexible organic solar cells (f-OSCs) necessitates high power conversion efficiency (PCE) and mechanical robustness. However, photoactive films based on efficient non-fullerene small molecule acceptors (NF-SMAs) are typically brittle, leading to poor stability in devices. In this study, we achieved a remarkable PCE 18.06 % f-OSCs while maintaining ultrahigh robustness (with crack-onset strain (COS) higher than 11 %) by incorporating linker dimerized acceptor (DOY-TVT). Compared binary blends, ternary systems exhibit reduced non-radiative recombination, suppressed crystallization diffusion NF-SMAs, improved load distribution across the chain networks, enabling dissipation energy. Thus, developed study achieved, stability, surpassing OSCs. Moreover, retained 97 initial even after 3000 bending cycles, indicating excellent (9.1 systems). Furthermore, rigid device with inverted structure optimal active layer exhibited substantial increase retention, 89.6 865 h at 85 °C 93 more 1300 shelf storage 25 °C. These findings highlight potential oligomer for realizing high-performing

Язык: Английский

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Efficient Dual Mechanisms Boost the Efficiency of Ternary Solar Cells with Two Compatible Polymer Donors to Exceed 19%

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

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Ternary Strategy Enables Non‐Halogenated Solvent‐Processed All‐Polymer Solar Cells with High Efficiency Over 18%

Advanced Functional Materials, Год журнала: 2024, Номер 34(21)

Опубликована: Янв. 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.

Язык: Английский

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