Achieving 20.8% organic solar cells via additive-assisted layer-by-layer fabrication with bulk p-i-n structure and improved optical management

Joule, Год журнала: 2024, Номер 8(11), С. 3153 - 3168

Опубликована: Авг. 29, 2024

Язык: Английский

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Facet-orientation-enhanced thermal transfer for temperature-insensitive and stable p-i-n perovskite solar cells

eScience, Год журнала: 2025, Номер unknown, С. 100372 - 100372

Опубликована: Янв. 1, 2025

Язык: Английский

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Tailored Lattice-Matched Carbazole Self-Assembled Molecule for Efficient and Stable Perovskite Solar Cells

Journal of the American Chemical Society, Год журнала: 2025, Номер 147(9), С. 8004 - 8011

Опубликована: Фев. 18, 2025

Self-assembled monolayer molecules have been widely employed as interfacial transport materials in inverted perovskite solar cells (PSCs), demonstrating high efficiency and improved device stability. However, self-assembling (SAM) often suffer from aggregation weak interactions with the layer, resulting inefficient charge transfer significant energy losses, ultimately limiting power conversion long-term stability of cells. In this work, we developed a series novel skeleton-matching carbazole isomer SAMs based on following key design principles: (1) introducing benzene ring structure to distort molecular skeleton SAM, thereby preventing achieving uniform distribution fluorine-doped tin oxide (FTO) substrates; (2) strategically incorporating methoxy groups onto at different positions (ortho, meta, para). These functional not only increase anchoring points layer but also fine-tune dipole moment. Among SAMs, m-PhPACz exhibits most favorable properties, maximum moment 2.4 D an O-O distance that aligns excellently diagonal lead ions adjacent lattice, enhancing SAM-perovskite interactions, facilitating efficient extraction, improving As result, new SAM-based PSCs achieved impressive 26.2%, 12.9% improvement. Moreover, devices demonstrated outstanding photothermal stability, retaining 96% their initial PCE after 1000 h 85 °C maintaining 90% 300 UV-light exposure.

Язык: Английский

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Double Hole Transport Layers Enable 20.42% Efficiency Organic Solar Cells by Aggregation Control of Self‐Assembled Molecules on Cobalt Salt Surfaces

Small, Год журнала: 2025, Номер unknown

Опубликована: Март 26, 2025

Heterojunction interfaces play a crucial role in charge carrier transport, influencing the overall photovoltaic performance of organic solar cells (OSCs). Despite importance, advancements interfacial engineering, especially optimizing microstructure and nanomorphology, have not kept pace with research on photoactive layers. In study, strategy is explored to control self-assembly growth alcohol-soluble Me-4PACz (4P) used as hole transport layer (HTL) OSCs. The surface architecture modified inorganic Co salts via Cu doping UV-ozone treatments, creating smooth top an increased Co3+/Co2+ ratio hydroxyl groups. This meticulous design fine-tuned assembly behavior self-assembled molecules, resulting transition from spherical aggregates more uniform worm-like morphology. Additionally, electrical optical properties are optimized passivate defects enhance wettability solvents, leading improved extraction reduced recombination losses. Consequently, OSC Cu-Co/4P HTL exhibited highest power conversion efficiency 20.42% (certified 20.20%). characteristic universality stability make potential candidate for widespread applications, particularly providing rationalized guidance further

Язык: Английский

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Binary Organic Solar Cells with >19.6% Efficiency: The Significance of Self-Assembled Monolayer Modification

ACS Energy Letters, Год журнала: 2024, Номер 9(9), С. 4209 - 4217

Опубликована: Авг. 1, 2024

Improving the uniformity and density of self-assembled monolayers (SAMs) is crucial to elevate photovoltaic performance organic solar cells (OSCs). Herein, we introduced small molecules 1-hydroxybenzotriazole (HOBT) modulate distribution electrical properties (4-(7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic acid (4PADCB) on indium tin oxide (ITO) transparent electrodes in an innovative manner. The hydroxyl group HOBT interacts with phosphate SAMs, while steric repulsion exerted by backbone efficiently regulates SAMs. This led a more uniform dense SAMs ITO. Furthermore, HOBT-modified have improved crystallization vertical phase separation upper active layer. Consequently, PM6:BTP-eC9 binary OSCs based exhibit impressive PCE 19.66%. Our work presents effective strategy for regulating SAM morphology offers promising approach advancing OSCs.

Язык: Английский

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Local Dipole Modulation Toward High Fill Factor in Organic Solar Cells

Advanced Materials, Год журнала: 2024, Номер 36(41)

Опубликована: Авг. 12, 2024

Abstract Dipole moment arrangement in organic semiconductors plays a critical role affecting the intermolecular packing, determining optoelectronic properties and device performance. Here, to get desired fill factor (FF) values solar cells (OSCs), local dipole of non‐fullerene acceptors (NFAs) is modulated by changing molecular asymmetries. Two NFAs, AA‐1 AA‐2 are designed synthesized, which have different substitutions alkyl alkoxyl groups. The unidirectional asymmetry creates distinct dipoles, while bidirectional mitigates variation. Despite minimal impact on monomolecular properties, significantly influences terminal group packing modes film state. This, turn, enhances relative dielectric constant, prolongs exciton lifetime, reduces sub‐bandgap defect states. Consequently, PBDB‐TF:AA‐2‐based OSCs achieve an exceptional FF 0.830 power conversion efficiency (PCE) 18.3%, with ternary reaching PCE 19.3%. This work highlights potential modulation material design ideal for high‐performance OSCs.

Язык: Английский

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Realizing over 18% Efficiency for M‐Series Acceptor‐Based Polymer Solar Cells by Improving Light Utilization

Advanced Energy Materials, Год журнала: 2024, Номер unknown

Опубликована: Июль 2, 2024

Abstract M‐series molecules are one kind of promising acceptor‐donor‐acceptor (A‐D‐A)‐type acceptors for constructing high‐performance organic solar cells (OSCs). However, their power conversion efficiencies (PCEs) lagging behind that current state‐of‐the‐art OSCs, limited by the relatively low fill factor (FF) and photocurrent. Herein, combined strategies layer‐by‐layer (LBL) deposition interface engineering conducted to systematically improve light utilization thus PCEs M36‐based OSCs. Through choosing a proper processing solvent, PCE 17.3% with an FF 77.9% is achieved resulting LBL devices, much higher than those (15.9%/74.0%) from blend‐casting devices. The improvement assigned favorable morphological evolution facilitates carrier generation transport as well reduces charge recombination. More importantly, light‐harvesting active layers can be enhanced upon employing self‐assembled monolayer (2‐(9H‐carbazol‐9‐yl)ethyl)phosphonic acid (2PACz) instead widely used PEDOT:PSS hole‐selecting layer, due decreased parasitic absorption former. Consequently, 2PACz‐based devices exhibit significantly increased photocurrent, affording up 18.2%, which highest among reported A‐D‐A‐type acceptor‐based These results deliver important enhance performance OSCs highlight great potential practical applications.

Язык: Английский

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A Brief Review on Self-Assembled Monolayers in Organic Solar Cells: Progress, Challenges, and Future Prospects

ACS Applied Electronic Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 22, 2025

Over the past decade, organic solar cells (OSCs) have made noticeable progress in photovoltaic performance thanks to emergence of electron acceptors capable intramolecular charge transfer, namely, nonfullerene small molecules. OSCs continue gain momentum by employing self-assembled monolayers (SAMs) as transport layers, particularly those involving conjugated system their functional groups and/or spacers. This review provides an overview SAMs, covering molecular designs, fabrication methods, and various functions OSCs. Additionally, it highlights currents issues surrounding along with efforts address them future perspectives.

Язык: Английский

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Achieving light utilization efficiency of 3.88% and efficiency of 14.04% for semitransparent layer-by-layer organic solar cells by diluting donor layer

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161148 - 161148

Опубликована: Фев. 1, 2025

Язык: Английский

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Molecular Design of Dimeric Acceptor Enables Binary Organic Solar Cells with 19.78% Efficiency and Enhanced Stability

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Abstract The development of organic solar cells (OSCs) with high efficiency and stability is highly desirable to facilitate its commercial applications. Although dimeric acceptors distinctive advantages have been widely studied, high‐performance binary OSCs based on such molecules rarely achieved. In this work, a new acceptor (DY‐FL) constructed by simultaneously optimizing the linking sites units, as well building blocks. Thanks effective molecular design, DY‐FL provides improved stacking for fibrous morphology favorable exciton/charge dynamics. Consequently, DY‐FL‐based render superior power conversion (PCE) 19.78%, representing record‐breaking acceptors. Importantly, devices display significantly enhanced operational under external stimuli light heat, in comparison their small molecule (Y‐F)‐based counterpart. These findings highlight significance blocks modes, providing insight into design strategy state‐of‐the‐art OSCs.

Язык: Английский

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