Dipole Moments Regulation of Biphosphonic Acid Molecules for Self-assembled Monolayers Boosts the Efficiency of Organic Solar Cells Exceeding 19.7%

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(20), С. 14287 - 14296

Опубликована: Май 8, 2024

PEDOT:PSS has been widely used as a hole extraction layer (HEL) in organic solar cells (OSCs). However, their acidic nature can potentially corrode the indium tin oxide (ITO) electrode over time, leading to adverse effects on longevity of OSCs. Herein, we have developed class biphosphonic acid molecules with tunable dipole moments for self-assembled monolayers (SAMs), namely, 3-BPIC(i), 3-BPIC, and 3-BPIC-F, which exhibit an increasing moment sequence. Compared centrosymmetric axisymmetric 3-BPIC 3-BPIC-F higher adsorption energies (Eads) ITO, shorter interface spacing, more uniform coverage ITO surface, better interfacial compatibility active layer. Thanks incorporation fluorine atoms, exhibits deeper highest occupied molecular orbital (HOMO) energy level larger compared resulting enlarged work function (WF) ITO/3-BPIC-F substrate. These advantages could not only improve within device but also lower impedance reduce nonradiative recombination at interface. As result, OSCs using SAM based obtained record high efficiency 19.71%, is than that achieved from 3-BPIC(i) (13.54%) (19.34%). Importantly, 3-BPIC-F-based significantly enhanced stability utilizing HEL. Our offers guidance future design functional SAMs realize even performance cells.

Язык: Английский

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Efficient all-small-molecule organic solar cells processed with non-halogen solvent

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Март 2, 2024

Abstract All-small-molecule organic solar cells with good batch-to-batch reproducibility combined non-halogen solvent processing show great potential for commercialization. However, of all-small-molecule are rarely reported and its power conversion efficiencies very difficult to improve. Herein, we designed synthesized a small molecule donor BM-ClEH that can take advantage strong aggregation property induced by intramolecular chlorine-sulfur non-covalent interaction improve molecular pre-aggregation in tetrahydrofuran corresponding micromorphology after film formation. Tetrahydrofuran-fabricated based on BM-ClEH:BO-4Cl achieved high 15.0% binary device 16.1% ternary under thermal annealing treatment. In contrast, weakly aggregated BM-HEH without bond is almost inefficient same conditions due poor disordered π-π stacking, indistinct phase separation exciton dissociation. This work promotes the development provides further guidance.

Язык: Английский

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Selenophene‐fused Perylene Diimide‐Based Cathode Interlayer Enables 19 % Efficiency Binary Organic Solar Cells via Stimulative Charge Extraction

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(37)

Опубликована: Июль 2, 2024

Abstract The cathode interlayer is crucial for the development of organic solar cells (OSCs), but research on simple and efficient materials lagging behind. Here, a donor‐acceptor (D–A) typed selenophene‐fused perylene diimide (PDI) derivative (SePDI3) developed as material (CIM) OSCs, non‐fused PDI (PDI3) used control CIM comparison. Compared to PDI3, SePDI3 shows stronger self‐doping effect better crystallinity, resulting in charge transport ability. Furthermore, interaction between L8‐BO can form an extraction channel, leading superior behavior. Finally, benefitting from significantly enhanced capacity, SePDI3‐based device displays champion PCE 19.04 % with ultrahigh fill factor 81.65 binary OSCs based PM6 : active layer, which one top efficiencies reported date novel CIMs. Our work prescribes facile effective fusion strategy develop high‐efficiency CIMs OSCs.

Язык: Английский

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Multiarmed Aromatic Ammonium Salts Boost the Efficiency and Stability of Inverted Organic Solar Cells

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(5), С. 3363 - 3372

Опубликована: Янв. 24, 2024

Inverted organic solar cells (OSCs) have attracted much attention because of their outstanding stability, with zinc oxide (ZnO) being commonly used as the electron transport layer (ETL). However, both surface defects and photocatalytic effect ZnO could lead to serious photodegradation acceptor materials. This, in turn, hampers improvement efficiency stability OSCs. Herein, we developed a multiarmed aromatic ammonium salt, namely, benzene-1,3,5-triyltrimethanaminium bromide (PhTMABr), for modifying ZnO. This compound possesses mild weak acidity aimed at removing residual amines present within film. In addition, PhTMABr also passivate through multiple hydrogen-bonding interactions between its terminal amino groups oxygen anion ZnO, leading better interface contact, which effectively enhances charge transport. As result, an 18.75% was achieved based on modified ETL compared bare (PCE = 17.34%). The devices utilizing retained 87% 90% initial PCE after thermal stress aging 65 °C 1500 h continuous 1-sun illumination maximum power point (MPP) tracking 1780 h, respectively. Importantly, extrapolated T

Язык: Английский

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Device engineering of non-fullerene organic photovoltaics with extrapolated operational T80 lifetime over 45,000 h in air

Joule, Год журнала: 2024, Номер 8(8), С. 2250 - 2264

Опубликована: Июнь 12, 2024

Язык: Английский

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Perylene Diimide‐Based Low‐Cost and Thickness‐Tolerant Electron Transport Layer Enables Polymer Solar Cells Approaching 19% Efficiency

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

Опубликована: Апрель 18, 2024

Abstract The materials for electron transport layers (ETLs) play a significant role in the performance of polymer solar cells (PSCs) but face challenges, such as low mobility and conductivity, solution processibility, extreme thickness sensitivity, which will undermine photovoltaic hinder compatibility large‐scale fabrication technique. To address these new n‐type perylene diimide‐based molecule (PDINB) with two special amine‐anchored long‐side chains is designed synthesized feasibly. PDINB shows very high solubility common organic solvents, dichloromethane (>75 mg ml −1 ) methanol acetic acid an additive (>37 ), leads to excellent film formability when deposited on active layers. With ETLs, PSCs boosted comprehensively, leading power conversion efficiency (PCE) up 18.81%. Thanks strong self‐doping effect conductivity PDINB, it displays appreciable thickness‐tolerant property where devices remain consistently PCE values varying from 5 30 nm. Interestingly, can be used generic ETL different types including non‐fullerene all‐polymer PSCs. Therefore, potentially competitive candidate efficient

Язык: Английский

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Strengthening Near‐Infrared Photon Harvesting in Semi‐Transparent All‐Polymer Solar Cells through the Synergy of Fluorination on the Selenide Monomer Backbone

Advanced Functional Materials, Год журнала: 2024, Номер 34(33)

Опубликована: Апрель 26, 2024

Abstract All‐polymer solar cells (all‐PSCs) offer promising potential for large‐scale manufacturing due to their remarkable mechanical and thermal stability. However, the limited capacity of polymer acceptors near‐infrared (NIR) photon harvesting has impeded progress in semi‐transparent (ST) all‐PSCs. Here, study develops a pair new NIR acceptors, named PYSeF‐T PYSe2F‐T, with mono‐/di‐fluorinated end groups capped selenide monomer backbone, respectively. Owing stronger intermolecular interaction intramolecular charge transfer effect di‐fluorinated PYSe2F‐T exhibits crystallinity more bathochromic absorption 1000 nm. When blended donor, PM6, PY2SeF‐T‐based all‐PSC demonstrates higher efficiency 16.73% short‐circuit current ( J SC ) 27.7 mA cm −2 , which is highest Based on these, ST device based PM6:PYSe2F‐T superior 12.52% an average visible transmittance 26.2% light utilization 3.28%, outperforming mono‐fluorinated counterpart. The work provides in‐depth understanding above synergistic effects develop establishes solid foundation future investigations into large‐area flexible

Язык: Английский

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Self-powered organic semiconductors photoelectrochemical strategy via CBT-Cys reaction for HSV-1 DNA detection

Microchemical Journal, Год журнала: 2025, Номер unknown, С. 112762 - 112762

Опубликована: Янв. 1, 2025

Язык: Английский

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Recent Progress of Solution‐Processed Thickness‐Insensitive Cathode Interlayers for High‐Performance Organic Solar Cells

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 5, 2025

Abstract Organic solar cells (OSCs) have shown great applications potential in flexible/wearable electronics, indoor photovoltaics and so on. The efficiencies of single‐junction OSCs exceeded 19%, making the commercialization brighter. Large‐area printing fabrication is a key way to OSCs, solution‐processed thickness‐insensitive cathode interlayers (CILs) are urgently needed for large‐area fabrication. High electron mobility interfacial materials (CIMs) critical enable CILs. N‐type self‐doped characteristics can endow organic CIMs with high mobility. Different type n‐type show different applicability conventional inverted OSCs. External dopants further increase hybrid blends. Particularly, ZnO doped dyes achieve superior photoconductivity This review focuses on CILs high‐performance In small molecules polymers, external n‐doped blends as summarized. small‐molecular electrolytes polyelectrolytes, PEI‐/PEIE‐based (including organic‐organic ZnO‐organic) summarized relationships between particular functions chemical structures highlighted. Finally, summary outlook provided.

Язык: Английский

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A Cathode Interface Layer Based on 4,5,9,10‐Pyrene Diimide for Highly Efficient Binary Organic Solar Cells

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(38)

Опубликована: Июль 23, 2022

Efficient cathode interfacial layers (CILs) are becoming essential elements for organic solar cells (OSCs). However, the absorption of commonly used materials (CIMs) is either too weak or overlaps much with that photoactive materials, hindering their contribution to light absorption. In this work, we demonstrate construction highly efficient CIMs based on 2,7-di-tert-butyl-4,5,9,10-pyrene diimide (t-PyDI) framework. By introducing amino, amino N-oxide and quaternary ammonium bromide as functional groups, three novel self-doped named t-PyDIN, t-PyDINO t-PyDINBr synthesized. These capable boosting device performances by broadening absorption, forming ohmic contact at interface active layer electrode, well facilitating electron collection. Notably, t-PyDIN achieved a power conversion efficiency 18.25 %, which among top efficiencies reported date in binary OSCs.

Язык: Английский

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