Self-Assembled Monolayers for Interfacial Engineering in Solution-Processed Thin-Film Electronic Devices: Design, Fabrication, and Applications

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(5), P. 2138 - 2204

Published: Feb. 29, 2024

Interfacial engineering has long been a vital means of improving thin-film device performance, especially for organic electronics, perovskites, and hybrid devices. It greatly facilitates the fabrication performance solution-processed devices, including field effect transistors (OFETs), solar cells (OSCs), perovskite (PVSCs), light-emitting diodes (OLEDs). However, due to limitation traditional interfacial materials, further progress these devices is hampered particularly in terms stability, flexibility, sensitivity. The deadlock gradually broken through development self-assembled monolayers (SAMs), which possess distinct benefits transparency, diversity, sensitivity, selectivity, surface passivation ability. In this review, we first showed evolution SAMs, elucidating their working mechanisms structure–property relationships by assessing wide range SAM materials reported date. A comprehensive comparison various growth, fabrication, characterization methods was presented help readers interested applying works. Moreover, recent design applications mainstream electronic OFETs, OSCs, PVSCs OLEDs, summarized. Finally, an outlook prospects section summarizes major challenges SAMs used

Language: Английский

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19.7% efficiency binary organic solar cells achieved by selective core fluorination of nonfullerene electron acceptors

Joule, Journal Year: 2024, Volume and Issue: 8(3), P. 835 - 851

Published: Jan. 30, 2024

Language: Английский

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Organic Solar Cells with Over 19% Efficiency Enabled by a 2D‐Conjugated Non‐Fullerene Acceptor Featuring Favorable Electronic and Aggregation Structures

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(32)

Published: May 27, 2023

The π-expansion of non-fullerene acceptors is a promising method for boosting the organic photovoltaic performance by allowing fine-tuning electronic structures and molecular packing. In this work, highly efficient solar cells (OSCs) are fabricated using 2D strategy to design new acceptors. Compared with quinoxaline-fused cores AQx-16, π-expanded phenazine-fused AQx-18 induce more ordered compact packing between adjacent molecules, affording an optimized morphology rational phase separation in blend film. This facilitates exciton dissociation inhibited charge recombination. Consequently, power conversion efficiency (PCE) 18.2% simultaneously increasing Voc , Jsc fill factor achieved AQx-18-based binary OSCs. Significantly, ternary devices via two-in-one alloy acceptor exhibit superior PCE 19.1%, one highest values ever reported OSCs, along high 0.928 V. These results indicate importance delicate regulation crystalline behaviors achieve performance, aimed at significantly promoting further development

Language: Английский

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Sequential Deposition of Multicomponent Bulk Heterojunctions Increases Efficiency of Organic Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(12)

Published: Jan. 18, 2023

Constructing tandem and multi-blend organic solar cells (OSCs) is an effective way to overcome the absorption limitations of conventional single-junction devices. However, these methods inevitably require tedious multilayer deposition or complicated morphology-optimization procedures. Herein, sequential utilized as simple method fabricate multicomponent OSCs with a double-bulk heterojunction (BHJ) structure active layer further improve photovoltaic performance. Two efficient donor-acceptor pairs, D18-Cl:BTP-eC9 PM6:L8-BO, are sequentially deposited form D18-Cl:BTP-eC9/PM6:L8-BO double-BHJ layer. In OSCs, light significantly improved, optimal morphology also retained without requiring more optimization involved in quaternary blends. Compared blend devices, energy loss (Eloss ) reduced by rationally matching each donor appropriate acceptor. Consequently, power conversion efficiency (PCE) improved from 18.25% for 18.69% PM6:L8-BO based binary 19.61% OSCs. contrast, D18-Cl:PM6:L8-BO:BTP-eC9 exhibited dramatically PCE 15.83%. These results demonstrate that strategy, relatively processing procedure, can potentially enhance device performance lead widespread use.

Language: Английский

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Dimerized small-molecule acceptors enable efficient and stable organic solar cells

Joule, Journal Year: 2023, Volume and Issue: 7(2), P. 416 - 430

Published: Feb. 1, 2023

Language: Английский

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High-Efficiency Ternary Organic Solar Cells with a Good Figure-of-Merit Enabled by Two Low-Cost Donor Polymers

ACS Energy Letters, Journal Year: 2022, Volume and Issue: 7(8), P. 2547 - 2556

Published: July 13, 2022

Here, we combine two donor polymers with a relatively short synthesis method and fabricate ternary organic solar cells (OSCs) high efficiency decent figure-of-merit. A series of characterizations show that the optimal morphology blend is result coupling competition PTQ10 PTVT-T, where molecular packing phase separation motif broken but strong aggregation PTVT-T suppressed, resulting in efficient charge transport collection, as well suppressed bimolecular recombination. Moreover, previously reported solvent-vapor-assisted casting method, taken an understanding-guided optimization, pushes system's to 19.11%. Furthermore, PTVT-T-containing systems clearly better light soaking thermal stability than binary control system, benefiting from durable polymer matrix. Our work provides useful approach for developing efficient, stable, low-cost OSCs based on state-of-the-art donor/acceptor through design.

Language: Английский

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Tandem organic solar cells with 20.6% efficiency enabled by reduced voltage losses

National Science Review, Journal Year: 2023, Volume and Issue: 10(6)

Published: March 30, 2023

ABSTRACT Large voltage losses are the main obstacle for achieving high efficiency in organic solar cells (OSCs). Here we construct ternary OSCs by introducing an asymmetric small molecule acceptor AITC into PBDB-TCl : BTP-eC9 system and demonstrate effectiveness simultaneously decreasing energy disorder non-radiative losses. It is found that introduction of can modify domain size increase degree crystallinity, which enhances open-circuit power conversion (19.1%, certified as 18.9%). Inspiringly, output 20.6% constructed tandem based on active layer a recorded (certified 20.3%), highest value field to date. This work demonstrates strategy constructing architecture effective approaches towards improving photovoltaic performance.

Language: Английский

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Multiphase Morphology with Enhanced Carrier Lifetime via Quaternary Strategy Enables High‐Efficiency, Thick‐Film, and Large‐Area Organic Photovoltaics

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(45)

Published: Sept. 15, 2022

With the continuous breakthrough of efficiency organic photovoltaics (OPVs), their practical applications are on agenda. However, thickness tolerance and upscaling in recently reported high-efficiency devices remains challenging. In this work, multiphase morphology desired carrier behaviors realized by utilizing a quaternary strategy. Notably, exciton separation, mobility, lifetime enhanced significantly, recombination energy loss (Eloss ) reduced, thus beneficial for higher short-circuit density (JSC ), fill factor (FF), open-circuit voltage (VOC system. Moreover, intermixing-phase size is optimized, which favorable constructing thick-film large-area devices. Finally, device with 110 nm-thick active layer shows an outstanding power conversion (PCE) 19.32% (certified 19.35%). Furthermore, (1.05 72.25 cm2 nm present PCEs 18.25% 12.20%, 305 film (0.0473 delivers PCE 17.55%, among highest values reported. The work demonstrates potential strategy OPVs promotes application future.

Language: Английский

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Molecular interaction induced dual fibrils towards organic solar cells with certified efficiency over 20%

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Aug. 10, 2024

The nanoscale fibrillar morphology, featuring long-range structural order, provides abundant interfaces for efficient exciton dissociation and high-quality pathways effective charge transport, is a promising morphology high performance organic solar cells. Here, we synthesize thiophene terminated non-fullerene acceptor, L8-ThCl, to induce the fibrillization of both polymer donor host that surpasses 20% efficiency milestone After adding original weak less continuous nanofibrils donors, i.e. PM6 or D18, are well enlarged refined, whilst acceptor L8-BO also assembles into with enhanced order. By adapting layer-by-layer deposition method, order can be retained significantly boost power conversion efficiency, specific values 19.4% 20.1% PM6:L8-ThCl/L8-BO:L8-ThCl D18:L8-ThCl/L8-BO:L8-ThCl devices, latter being certified 20.0%, which highest reported so far single-junction

Language: Английский

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Peripheral halogenation engineering controls molecular stacking to enable highly efficient organic solar cells

Energy & Environmental Science, Journal Year: 2022, Volume and Issue: 15(8), P. 3519 - 3533

Published: Jan. 1, 2022

The diverse molecular stacking tuned by peripheral halogens in non-fullerene acceptors (NFAs) significantly affects the physicochemical properties, film morphologies and thus power conversion efficiencies (PCEs) of organic solar cells (OSCs).

Language: Английский

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