A guest-assisted molecular-organization approach for >17% efficiency organic solar cells using environmentally friendly solvents

Nature Energy, Journal Year: 2021, Volume and Issue: 6(11), P. 1045 - 1053

Published: Nov. 1, 2021

Language: Английский

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Recent progress in organic solar cells (Part II device engineering)

Science China Chemistry, Journal Year: 2022, Volume and Issue: 65(8), P. 1457 - 1497

Published: May 26, 2022

Language: Английский

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Ternary Blend Organic Solar Cells: Understanding the Morphology from Recent Progress

Advanced Materials, Journal Year: 2021, Volume and Issue: 34(46)

Published: Nov. 19, 2021

Ternary blend organic solar cells (TB-OSCs) incorporating multiple donor and/or acceptor materials into the active layer have emerged as a promising strategy to simultaneously improve overall device parameters for realizing higher performances than binary devices. Whereas introducing also results in more complicated morphology their counterparts. Understanding is crucially important further improving performance of TB-OSC. This review introduces solubility and miscibility that affect ternary blends. Then, this summarizes recent processes study on blends from aspects molecular crystallinity, packing orientation, domain size purity, directly observation morphology, vertical phase separation well morphological stability. Finally, summary prospects TB-OSCs are concluded.

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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Covalent Organic Framework Thin-Film Photodetectors from Solution-Processable Porous Nanospheres

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(3), P. 1649 - 1659

Published: Jan. 9, 2023

The synthesis of homogeneous covalent organic framework (COF) thin films on a desired substrate with decent crystallinity, porosity, and uniform thickness has great potential for optoelectronic applications. We have used solution-processable sphere transmutation process to synthesize 300 ± 20 nm COF 2 × cm2 TiO2-coated fluorine-doped tin oxide (FTO) surface. This controls the nucleation crystallites molecular morphology that helps nanospheres arrange periodically form films. synthesized four (TpDPP, TpEtBt, TpTab, TpTta) different functional backbones. In close agreement between experiment density theory, TpEtBr film showed lowest optical band gap (2.26 eV) highest excited-state lifetime (8.52 ns) among all Hence, can participate in efficient charge generation separation. constructed devices having glass/FTO/TiO2/COF-film/Au architecture, which serves as model system study transport properties under dark illuminated conditions. Visible light calibrated intensity 100 mW cm-2 was excitation All exhibit significant photocurrent after illumination visible comparison dark. behave good photoactive substrates minimal pinhole defects. fabricated out-of-plane photodetector device based exhibits high (2.65 0.24 mA at 0.5 V) hole mobility (8.15 0.64 ×10-3 V-1 S-1) compared other as-synthesized films, indicating best characteristics.

Language: Английский

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Fluid Mechanics Inspired Sequential Blade‐Coating for High‐Performance Large‐Area Organic Solar Modules

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(29)

Published: May 1, 2022

Abstract Despite rapid advances in the field of organic solar cells (OSCs), high‐performance large‐scale OSC modules are limited. In this study, it is found that non‐Newtonian fluid feature conjugated polymer primarily causes wedge‐shaped mass (donor and/or acceptor component)/phase distribution blends blade coating, which results lower module efficiency. To address critical issue printing manufacturing, a reversible and sequential layer‐by‐layer (RS‐LBL) deposition method with twice forward/reverse blade‐coating donor forward Y6 acceptor, developed for precisely controlling mechanics PM6:Y6 active layer. Through using RS‐LBL strategy, uniform morphology favorable phase separation crystallization obtained 10 × cm 2 As result, RS‐LBL‐based OSCs show excellent operational stability, an outstanding PCE 13.47% achieved significantly suppressed charge recombination losses 36 large‐area module, represents highest efficiency binary area over 30 . This study provides feasible route next generation modules.

Language: Английский

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Emerging Chemistry in Enhancing the Chemical and Photochemical Stabilities of Fused‐Ring Electron Acceptors in Organic Solar Cells

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(50)

Published: Sept. 9, 2021

Abstract The power conversion efficiency of organic solar cells (OSCs) has made exceptionally rapid progress in the past five years owing to emergence fused‐ring electron acceptors (FREAs). To achieve commercialization, it is urgent resolve stability issues OCSs from materials devices. In particular, state‐of‐the‐art FREAs, often synthesized by Knoevenagel condensation, generally contain two exocyclic vinyl groups (CC bond) as conjugated bridges, which inevitably exhibit an obvious electron‐deficient characteristic due strong push‐pull electronic effect. As a result, these bridges are vulnerable nucleophile attacking and/or photooxidation, leading poor chemical and photochemical stabilities FREAs that easily cause degradation device performance. this perspective, in‐depth understanding mechanism provided, then effective strategies reported recently reviewed for improving interfacial engineering molecular additive engineering. Finally, conclusion outlook future design highly efficient stable also presented.

Language: Английский

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Recent Progress in Materials and Device Design for Semitransparent Photovoltaic Technologies

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(39)

Published: Sept. 5, 2023

Abstract Semitransparent photovoltaic (STPV) solar cells offer an immense opportunity to expand the scope of photovoltaics special applications such as windows, facades, skylights, and so on. These new opportunities have encouraged researchers develop STPVs using traditional thin‐film cell technologies (amorphous‐Si, CdTe, CIGS or emerging (organic, perovskites, dye‐sensitized). There are considerable improvements in both power conversion efficiency (PCE) semitransparency these STPV devices. This review studies device structure state‐of‐the‐art devices thereby analyzes different approaches toward maximizing product PCE average visible transmittance. The origins losses during opaque‐to‐semitransparent transition discussed. In addition, critical practical aspects relevant all devices, compatibility top transparent electrode with structure, buffer layer optimization, light management engineering, scale‐up, stability, also reported. overview is expected facilitate across identify overcome challenges achieving higher utilization efficiencies STPVs.

Language: Английский

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A Review on Fullerene Derivatives with Reduced Electron Affinity as Acceptor Materials for Organic Solar Cells

Energies, Journal Year: 2023, Volume and Issue: 16(4), P. 1924 - 1924

Published: Feb. 15, 2023

Organic solar cells (OSCs) represent a promising emerging photovoltaic technology offering such benefits as light weight, mechanical flexibility, semitransparency, environmental friendliness and aesthetic design of panels. Furthermore, organic can be produced using scalable high-throughput solution-based printing coating technologies, which are expected to lead very low product costs. Fullerene derivatives have been used acceptor materials in virtually all efficient for more than two decades, following the demonstration first proof-of-concept devices middle 1990s. Still, power conversion efficiencies fullerene-based became stuck at around 12% due suboptimal optoelectronic properties conventional fullerene acceptors. Therefore, latest efficiency records (>18%) were set different types non-fullerene (NFA) with tailorable properties. However, NFA appeared sensitive light, thus impairing operational stability OSCs. On contrary, there is growing evidence that rationally designed acceptors enhance photostability conjugated polymers also NFAs, when ternary blends. Hence, renaissance currently context their use multicomponent (e.g., stabilizers) halide perovskite cells, where they play an important role electron transport materials. The success both these applications requires tunability characteristics derivatives. In particular, affinity cage has reduced many cases match energy levels other absorber material(s). Herein, we present systematic review strategies implemented reduce strength results performance evaluation OSCs model polymers. Particular attention paid correlations between chemical structure addends influence on electronic core. We believe this would valuable researchers working rational new tailored applications.

Language: Английский

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Understanding photochemical degradation mechanisms in photoactive layer materials for organic solar cells

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(14), P. 7426 - 7454

Published: Jan. 1, 2024

Over the past decades, field of organic solar cells (OSCs) has witnessed a significant evolution in materials chemistry, which resulted remarkable enhancement device performance, achieving efficiencies over 19%. The photoactive layer OSCs play crucial role light absorption, charge generation, transport and stability. To facilitate scale-up OSCs, it is imperative to address photostability these electron acceptor donor materials, as their photochemical degradation process remains challenge during photo-to-electric conversion. In this review, we present an overview development emphasizing aspects chemical stability behavior that are linked OSCs. Throughout each section, highlight pathways for link degradation. We also discuss existing interdisciplinary challenges obstacles impede photostable materials. Finally, offer insights into strategies aimed at enhancing future directions developing photo-active layers, facilitating commercialization

Language: Английский

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