Recent Progress and Challenges toward Highly Stable Nonfullerene Acceptor‐Based Organic Solar Cells

Advanced Energy Materials, Journal Year: 2020, Volume and Issue: 11(5)

Published: Dec. 27, 2020

Abstract Organic solar cells (OSCs) based on nonfullerene acceptors (NFAs) have made significant breakthrough in their device performance, now achieving a power conversion efficiency of ≈18% for single junction devices, driven by the rapid development molecular design and engineering recent years. However, long‐term stability remains major challenge to overcome commercialization, due large part current lack understanding degradation mechanisms as well rules enhancing stability. In this review, progress high performance NFA‐based OSCs is specific focus. First, an overview advances several classes various targeted applications provided, before presenting critical review different identified through photochemical‐, photo‐, morphological pathways. Potential strategies address these further enhancement, from design, interfacial engineering, morphology control perspectives, are also discussed. Finally, outlook given highlighting remaining key challenges toward NFA‐OSCs.

Language: Английский

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Recent advances in PM6:Y6-based organic solar cells

Materials Chemistry Frontiers, Journal Year: 2021, Volume and Issue: 5(8), P. 3257 - 3280

Published: Jan. 1, 2021

This review provides a detailed overview of PM6:Y6-based organic solar cells (OSCs), including the underlying mechanisms, terpolymers derived from PM6, ternary or quaternary OSCs, interfacial engineering and electrode progress.

Language: Английский

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From Solution to Thin Film: Molecular Assembly of π-Conjugated Systems and Impact on (Opto)electronic Properties

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(13), P. 8395 - 8487

Published: June 5, 2023

The assembly of conjugated organic molecules from solution to solid-state plays a critical role in determining the thin film morphology and optoelectronic properties solution-processed electronics photovoltaics. During evaporative processing, π-conjugated systems can assemble via various forms intermolecular interactions, forming distinct aggregate structures that drastically tune charge transport landscape solid-state. In blend composed donor polymer acceptor molecules, neat materials couples with phase separation crystallization processes, leading complex transition pathways which govern morphology. this review, we provide an in-depth review molecular processes polymers nonfullerene small molecule acceptors discuss their impact on properties. We then shift our focus relevant solar cells fundamentals highlight how processing conditions affect device performance.

Language: Английский

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Structurally Complementary Star‐Shaped Unfused Ring Electron Acceptors with Simultaneously Enhanced Device Parameters for Ternary Organic Solar Cells

Solar RRL, Journal Year: 2023, Volume and Issue: 7(11)

Published: April 8, 2023

Ternary strategy has attracted extensive attention for bulk heterojunction organic solar cells (BHJ OSCs) owing to their potentially improved light harvesting, cascaded energy levels, and optimized film morphology of binary BHJs. Herein, three novel star‐shaped unfused ring electron acceptors (SSUFREAs), i.e., H 1–3, with without fluorine‐substituent in phenyl core or peripheral group are designed synthesized as third components via direct C–H arylation incorporate into PM6:Y6 BHJ films. The structure–property–performance dependence study reveals that the isotropic charge transfer, complementary star‐shape structure absorption, energy‐level cascades 1–3 PM6 Y6 allow ternary BHJs have higher power conversion efficiency (PCE) compared BHJ. Among them, involving fluorine‐free 1, 1:PM6:Y6, possesses highest PCE (16.57%) high‐lying frontier molecular orbital enlarged torsion angle, which enhances open‐circuit voltage, inhibits excessive crystallization Y6, facilitates exciton dissociation well collection. findings indicate SSUFREAs great potential serve optimize improve voltage OSCs.

Language: Английский

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Designing spirobifullerene core based three‐dimensional cross shape acceptor materials with promising photovoltaic properties for high‐efficiency organic solar cells

International Journal of Quantum Chemistry, Journal Year: 2020, Volume and Issue: 120(22)

Published: July 13, 2020

Abstract The development of organic electron acceptor materials is one the key factors for realizing high‐performance solar cells (OSCs). Nonfullerene acceptors, compared to traditional fullerene materials, have gained much impetus owing their better optoelectronic tunabilities and lower cost, as well higher stability. Therefore, 5 three‐dimensional (3D) cross‐shaped having a spirobifullerene core flanked with 2,1,3‐benzothiadiazole are designed from recently synthesized highly efficient molecule SF(BR) 4 investigated in detail regard use molecules OSCs. density functional theory (DFT) time‐dependent DFT (TDDFT) calculations been performed estimation frontier molecular orbital (FMO) analysis, states reorganization energies hole, dipole moment, open‐circuit voltage, photo‐physical characteristics, transition matrix analysis. In addition, structure‐property relationship studied, influence end‐capped modifications on photovoltaic, photo‐physical, electronic properties newly selected ( H1‐H5 ) calculated reference R . structural tailoring at terminals was found effectively tune FMO band gap, energy levels, absorption spectra, energy, binding value H1 H5 3D suppress intermolecular aggregation PTB7‐Th blend, which leads high efficiency material Consequently, achieved It proposed that conceptualized superior than core‐based and, thus, recommended experiments future developments cells.

Language: Английский

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Inhibiting excessive molecular aggregation to achieve highly efficient and stabilized organic solar cells by introducing a star-shaped nitrogen heterocyclic-ring acceptor

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 15(1), P. 384 - 394

Published: Dec. 3, 2021

A star-shaped nitrogen heterocyclic-ring acceptor TF1 featuring a unique 3D skeleton was successfully utilized to inhibit excessive molecular aggregation of Y6 improve the stability and performance organic solar cells.

Language: Английский

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Fast Response Organic Tandem Photodetector for Visible and Near‐Infrared Digital Optical Communications

Small, Journal Year: 2021, Volume and Issue: 17(43)

Published: June 10, 2021

Organic photodetectors (OPDs), which usually work as photodiodes, photoconductors, or phototransistors, have emerged candidates for next-generation light sensing. However, low response speed caused by carrier mobility and resistance-capacitance (RC) time constant, severely hinders the commercialization of OPDs. Herein, authors demonstrate a state-of-the-art OPD with record 146.8 ns employing tandem structure to simultaneously reduce both transit RC constant device, is faster than that previously reported OPDs far they know. Moreover, benefitting from multi-level barrier enhancement voltage division engendered structure, an ultralow noise current 7.82 × 10-14 A Hz-1/2 obtained, well wide detection range in 300-1000 nm. In addition, are successfully integrated into optical communication system signal receivers, demonstrating precise digital visible near-infrared light. It believed promising application potential wireless transmission system.

Language: Английский

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Recent Progress in the Design of Fused-Ring Non-Fullerene Acceptors─Relations between Molecular Structure and Optical, Electronic, and Photovoltaic Properties

ACS Applied Energy Materials, Journal Year: 2021, Volume and Issue: 4(11), P. 11899 - 11981

Published: Oct. 26, 2021

Organic solar cells are on the dawn of next era. The change focus toward non-fullerene acceptors has introduced an enormous amount organic n-type materials and drastically increased power conversion efficiencies photovoltaics, now exceeding 18%, a value that was believed to be unreachable some years ago. In this Review, we summarize recent progress in design ladder-type fused-ring 2018–2020. We thereby concentrate single layer heterojunction omit tandem architectures as well ternary cells. By analyzing more than 700 structures, highlight basic principles their influence optical electrical structure acceptor molecules review photovoltaic performance obtained so far. This Review should give extensive overview plenitude motifs but will also help understand which structures strategies beneficial for designing highly efficient

Language: Английский

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Toward high-performance organic photovoltaics: the new cooperation of sequential solution-processing and promising non-fullerene acceptors

Materials Horizons, Journal Year: 2022, Volume and Issue: 9(8), P. 2097 - 2108

Published: Jan. 1, 2022

This minireview highlights the recent progress on sequential solution-processed fullerene-free OPVs, which can improve power conversion efficiency, stability, and drive industrial applications in semitransparent large-area OPVs.

Language: Английский

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18% efficiency of ternary organic solar cells enabled by integrating a fused perylene diimide guest acceptor

Nano Energy, Journal Year: 2023, Volume and Issue: 112, P. 108501 - 108501

Published: May 2, 2023

Language: Английский

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