Rational molecular and device design enables organic solar cells approaching 20% efficiency

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

Published: Feb. 28, 2024

Abstract For organic solar cells to be competitive, the light-absorbing molecules should simultaneously satisfy multiple key requirements, including weak-absorption charge transfer state, high dielectric constant, suitable surface energy, proper crystallinity, etc. However, systematic design rule in achieve abovementioned goals is rarely studied. In this work, guided by theoretical calculation, we present a rational of non-fullerene acceptor o-BTP-eC9, with distinct photoelectric properties compared benchmark BTP-eC9. o-BTP-eC9 based device has uplifted therefore significantly reducing energy loss 41 meV and showing excellent power conversion efficiency 18.7%. Moreover, new guest miscibility, level compatibility BTP-eC9, which enables an 19.9% (19.5% certified) PM6:BTP-C9:o-BTP-eC9 ternary system enhanced operational stability.

Language: 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, Journal Year: 2022, Volume and Issue: 9(30)

Published: Aug. 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

Language: Английский

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Interface Engineering for Highly Efficient Organic Solar Cells

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(16)

Published: March 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.

Language: Английский

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Enhancing Photon Utilization Efficiency for High‐Performance Organic Photovoltaic Cells via Regulating Phase‐Transition Kinetics

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(16)

Published: Jan. 30, 2023

Efficient photon utilization is key to achieving high-performance organic photovoltaic (OPV) cells. In this study, a multiscale fibril network morphology in PBQx-TCl:PBDB-TF:eC9-2Cl-based system constructed by regulating donor and acceptor phase-transition kinetics. The distinctive process crystal size are systematically investigated. PBQx-TCl eC9-2Cl form structures with diameters of ≈25 nm ternary films. Additionally, fine fibrils assembled PBDB-TF uniformly distributed over the networks eC9-2Cl. ideal enables achieve superior charge transfer transport processes compared binary systems; these improvements promote enhanced efficiency. Finally, high power conversion efficiency 19.51% single-junction OPV cell achieved. external quantum optimized exceeds 85% wide range 500-800 nm. A tandem also fabricated increase solar absorption. has an excellent PCE more than 20%. This study provides guidance for constructing improving

Language: Английский

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Ternary organic solar cells: A review of the role of the third element

Nano Energy, Journal Year: 2022, Volume and Issue: 94, P. 106915 - 106915

Published: Jan. 4, 2022

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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Ternary strategy enabling high-efficiency rigid and flexible organic solar cells with reduced non-radiative voltage loss

Energy & Environmental Science, Journal Year: 2022, Volume and Issue: 15(4), P. 1563 - 1572

Published: Jan. 1, 2022

The addition of ZY-4Cl into the host PM6:BTP-eC9 can result in reduced density trap states and suppressed non-radiative recombination, thus enabling ternary device with an obviously lower voltage loss than either binary devices.

Language: Английский

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Design of Near‐Infrared Nonfullerene Acceptor with Ultralow Nonradiative Voltage Loss for High‐Performance Semitransparent Ternary Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 61(19)

Published: Dec. 28, 2021

Semitransparent organic solar cells (ST-OSCs) are considered as one of the most valuable applications OSCs and a strong contender in market. However, optical band gap current high-performance ST-OSCs is still not low enough to achieve optimal balance between power conversion efficiency (PCE) average visible transmittance (AVT). An N-substituted asymmetric nonfullerene acceptor SN with over 40 nm bathochromically shifted absorption compared Y6 was designed synthesized, based on which device PM6 donor obtained PCE 14.3 %, accompanied nonradiative voltage loss 0.15 eV. Meanwhile, ternary devices addition into : can 17.5 % an unchanged open-circuit improved short-circuit current. Benefiting from extended NIR lowered loss, were fabricated optimized demonstrated 14.0 at AVT 20.2 highest 20 %.

Language: Английский

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High-speed sequential deposition of photoactive layers for organic solar cell manufacturing

Nature Energy, Journal Year: 2022, Volume and Issue: 7(11), P. 1087 - 1099

Published: Oct. 27, 2022

Language: 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, Journal Year: 2023, Volume and Issue: 7(1), P. 221 - 237

Published: Jan. 1, 2023

Language: Английский

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