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

Joule, Год журнала: 2024, Номер 8(3), С. 835 - 851

Опубликована: Янв. 30, 2024

Язык: Английский

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Benzo[d]thiazole Based Wide Bandgap Donor Polymers Enable 19.54% Efficiency Organic Solar Cells Along with Desirable Batch‐to‐Batch Reproducibility and General Applicability

Advanced Materials, Год журнала: 2023, Номер 35(21)

Опубликована: Март 4, 2023

Abstract The limited selection pool of high‐performance wide bandgap (WBG) polymer donors is a bottleneck problem the nonfullerene acceptor (NFA) based organic solar cells (OSCs) that impedes further improvement their photovoltaic performances. Herein, series new WBG polymers, namely PH‐BTz, PS‐BTz, PF‐BTz, and PCl‐BTz, are developed by using bicyclic difluoro‐benzo[d]thiazole (BTz) as block benzo[1,2‐b:4,5‐b′]dithiophene (BDT) derivatives donor units. By introducing S, F, Cl atoms to alkylthienyl sidechains on BDT, resulting polymers exhibit lowered energy levels enhanced aggregation properties. fluorinated PBTz‐F not only exhibits low‐lying HOMO level, but also has stronger face‐on packing order results in more uniform fibril‐like interpenetrating networks related PF‐BTz:L8‐BO blend. A high‐power conversion efficiency (PCE) 18.57% achieved. Moreover, good batch‐to‐batch reproducibility general applicability. In addition, ternary blend OSCs host PBTz‐F:L8‐BO PM6 guest PCE 19.54%, which among highest values OSCs.

Язык: Английский

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Over 19.2% Efficiency of Organic Solar Cells Enabled by Precisely Tuning the Charge Transfer State Via Donor Alloy Strategy

Advanced Science, Год журнала: 2022, Номер 9(30)

Опубликована: Авг. 23, 2022

The large energy loss (Eloss ) is one of the main obstacles to further improve photovoltaic performance organic solar cells (OSCs), which closely related charge transfer (CT) state. Herein, ternary donor alloy strategy used precisely tune CT state (ECT and thus Eloss for boosting efficiency OSCs. elevated ECT in OSCs reduce generation (ΔECT ), promote hybridization between localized excitation nonradiative (ΔEnonrad ). Together with optimal morphology, afford an impressive power conversion 19.22% a significantly improved open-circuit voltage (Voc 0.910 V without sacrificing short-cicuit density (Jsc fill factor (FF) comparison binary ones. This contribution reveals that tuning via efficient way minimize

Язык: Английский

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Interface Engineering for Highly Efficient Organic Solar Cells

Advanced Materials, Год журнала: 2023, Номер 36(16)

Опубликована: Март 3, 2023

Organic solar cells (OSCs) have made dramatic advancements during the past decades owing to innovative material design and device structure optimization, with power conversion efficiencies surpassing 19% 20% for single-junction tandem devices, respectively. Interface engineering, by modifying interface properties between different layers OSCs, has become a vital part promote efficiency. It is essential elucidate intrinsic working mechanism of layers, as well related physical chemical processes that manipulate performance long-term stability. In this article, advances in engineering aimed pursue high-performance OSCs are reviewed. The specific functions corresponding principles summarized first. Then, anode layer, cathode layer interconnecting devices discussed separate categories, engineering-related improvements on efficiency stability analyzed. Finally, challenges prospects associated application emphasis large-area, high-performance, low-cost manufacturing.

Язык: Английский

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

Advanced Materials, Год журнала: 2023, Номер 35(12)

Опубликована: Янв. 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.

Язык: Английский

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

National Science Review, Год журнала: 2023, Номер 10(6)

Опубликована: Март 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.

Язык: Английский

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18.2%-efficient ternary all-polymer organic solar cells with improved stability enabled by a chlorinated guest polymer acceptor

Joule, Год журнала: 2023, Номер 7(1), С. 221 - 237

Опубликована: Янв. 1, 2023

Язык: Английский

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Stability of organic solar cells: toward commercial applications

Chemical Society Reviews, Год журнала: 2024, Номер 53(5), С. 2350 - 2387

Опубликована: Янв. 1, 2024

Organic solar cells (OSCs) have attracted a great deal of attention in the field clean energy due to their advantages transparency, flexibility, low cost and light weight. Introducing them market enables seamless integration into buildings windows, while also supporting wearable, portable electronics internet-of-things (IoT) devices. With development photovoltaic materials optimization fabrication technology, power conversion efficiencies (PCEs) OSCs rapidly improved now exceed 20%. However, there is significant lack focus on material stability device lifetime, causing severe hindrance commercial applications. In this review, we carefully review important strategies employed improve over past three years from perspectives design engineering. Furthermore, analyze discuss current progress terms air, light, thermal mechanical stability. Finally, propose future research directions overcome challenges achieving highly stable OSCs. We expect that will contribute solving problem OSCs, eventually paving way for applications near future.

Язык: Английский

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

Energy & Environmental Science, Год журнала: 2022, Номер 15(8), С. 3519 - 3533

Опубликована: Янв. 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).

Язык: Английский

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18.9% Efficient Organic Solar Cells Based on n‐Doped Bulk‐Heterojunction and Halogen‐Substituted Self‐Assembled Monolayers as Hole Extracting Interlayers

Advanced Energy Materials, Год журнала: 2022, Номер 12(45)

Опубликована: Окт. 3, 2022

Abstract The influence of halogen substitutions (F, Cl, Br, and I) on the energy levels self‐assembled hole‐extracting molecule [2‐(9 H ‐Carbazol‐9‐yl)ethyl]phosphonic acid (2PACz), is investigated. It found that formation monolayers (SAMs) [2‐(3,6‐Difluoro‐9 ‐carbazol‐9‐yl)ethyl]phosphonic (F‐2PACz), [2‐(3,6‐Dichloro‐9 (Cl‐2PACz), [2‐(3,6‐Dibromo‐9 (Br‐2PACz), [2‐(3,6‐Diiodo‐9 (I‐2PACz) directly indium tin oxide (ITO) increases its work function from 4.73 eV to 5.68, 5.77, 5.82, 5.73 eV, respectively. Combining these ITO/SAM electrodes with ternary bulk‐heterojunction (BHJ) system PM6:PM7‐Si:BTP‐eC9 yields organic photovoltaic (OPV) cells power conversion efficiency (PCE) in range 17.7%–18.5%. OPVs featuring Cl‐2PACz SAMs yield highest PCE 18.5%, compared F‐2PACz (17.7%), Br‐2PACz (18.0%), or I‐2PACz (18.2%). Data analysis reveals enhanced performance Cl‐2PACz‐based relates increased hole mobility, decreased interface resistance, reduced carrier recombination, longer lifetime. Furthermore, show stability under continuous illumination ITO/PEDOT:PSS‐based cells. Remarkably, introduction n‐dopant benzyl viologen into BHJ further boosted ITO/Cl‐2PACz a maximum value 18.9%, record‐breaking for SAM‐based par best‐performing reported date.

Язык: Английский

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