Exciton correlation dynamics in flexible ultrathin photovoltaics


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Interplay of coulomb and exciton–phonon coupling controls singlet

Sep 3, 2024· Organic semiconductors may act as conductors directly in, e.g., field effect transistors, 1 and they may also be utilized as the active absorber layer in organic solar cells. 2,3 In addition, a special class of organic chromophores can undergo singlet exciton fission (SF), a process that could potentially increase solar cell efficiency above

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Flexible Organic Solar Cells: Progress and Challenges

Mar 30, 2021· The recent progress in flexible organic solar cells (OSCs) based on various flexible transparent electrodes (FTEs) is reviewed. Although the ultrathin metal films have been extensively used in flexible OSCs, as the thickness of ultrathin metal film decreases, its resistance will increase sharply, it is still hard to achieve high-performance

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Exciton formation dynamics at the SiO2/Si interface

Nov 15, 2023· Exciton formation in silicon a, b Frequency-resolved complex photoconductivity at pump-probe delays of 5 a and 290 ps b for the indicated temperatures at a fluence of 10.3 μJ cm⁻².

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Electronic and optical properties of ultra-thin 2D tungsten disulfide

Sep 25, 2018· @article{osti_1579811, title = {Electronic and optical properties of ultra-thin 2D tungsten disulfide for photovoltaic applications}, author = {Roy, Sayan and Bermel, Peter}, abstractNote = {Atomically thin 2D layered semiconductor materials such as Transition Metal Di-Chalcogenides (TMDCs) have great potential for use as flexible, ultra-thin photovoltaic

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Enhancing Exciton Diffusion Length Provides New Opportunities

Aug 5, 2020· In particular, enhanced exciton diffusion can improve light harvesting in solar cells that can be manufactured using water-based solutions of electron donor and acceptor nanoparticles or by sequential deposition of donor and acceptor, offering low-cost and environmentally friendly production. Summary.

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Third Generation Photovoltaics based on Multiple Exciton

Oct 31, 2012· Improving the primary photoconversion process in a photovoltaiccell by utilizing the excess energy that is otherwise lost as heat can lead to an increase in the overall power conversion efficiency

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Long-range exciton diffusion in molecular non-fullerene acceptors

Oct 15, 2020· The short exciton diffusion length associated with most classical organic semiconductors used in organic photovoltaics (5-20 nm) imposes severe limits on the maximum size of the donor and acceptor

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Long exciton diffusion distance and efficient exciton dissociation

Aug 1, 2024· The exciton diffusion length was determined to be ∼26 and ∼34 nm in ITIC and IT4F. We further examined the dissociation of excitons in those NFA at the acceptor/donor planar heterojunction interfaces by transient absorption measurements, in which efficient charge generation was observed.

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Physical insights into non-fullerene organic photovoltaics

Apr 15, 2024· Boosted by the fast development of non-fullerene acceptors, organic photovoltaics (OPVs) have achieved breakthrough power conversion efficiencies — in excess of 20% and approaching those of...

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How does singlet exciton diffusion affect photovoltaic conversion?

Singlet exciton diffusion plays a central role in the photovoltaic conversion in organic photovoltaics (OPVs). Upon light absorption, singlet excitons are promptly generated in organic materials instead of charge carriers because the dielectric constant (ε r) is small (∼3–4), which is in sharp contrast to inorganic and perovskite solar cells.

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Exciton Binding Energies in Organic Photovoltaic Materials: A

Dec 29, 2021· For organic solar cells, the existence of Eb necessitates interfacial energy level offsets to drive exciton dissociation into free charge carriers at the donor/acceptor interfaces, which results in an extra energy loss with respect to inorganic and perovskite solar cells.

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Organic Photovoltaic Stability: Understanding the Role of

engineering exciton and charge carrier pathways. Considering the intrinsic connection among. multiple temporal-scale photocarrier dynamics, multi-length scale morphologies and photovoltaic. performance in OPVs, this review delineates and establishes a comprehensive and in-depth.

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Exciton optics, dynamics, and transport in atomically thin

Oct 31, 2022· Furthermore, TMD exciton–polaritons were shown to inherit the valley physics of the constituent exciton. 149–151 Research on valley polaritonics has emerged as a popular subfield, and numerous combined nanophotonic and valleytronic architectures have been explored. 152–154 In a notable example, it was shown that a condensate of exciton

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Exciton physics and device application of two-dimensional

Sep 10, 2018· Two-dimensional group-VI transition metal dichalcogenide semiconductors, such as MoS2, WSe2, and others, exhibit strong light-matter coupling and possess direct band gaps in the infrared and

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Do non-fullerene acceptors produce excitons and photocurrent in organic photovoltaics?

Non-fullerene acceptor materials show strong visible and near-infrared absorption and thus can generate abundant excitons and photocurrent in organic photovoltaics. Exciton diffusion coefficients for non-fullerene acceptors are much larger than those for fullerene acceptors.

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Dynamics of self-hybridized exciton–polaritons in 2D halide

Jan 1, 2024· In summary, we have developed an open-cavity system that supports self-hybridized exciton polaritons in 2D HOIP crystals and studied their charge and energy transfer dynamics in detail.

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New Insights into the Correlation between Morphology, Excited

Aug 1, 2016· Morphology plays a vital role on the performance of organic photovoltaics. However, our understanding of the morphology‐performance relationships for organic photovoltaics remains lacking. Specifically, it is still an open question why some bulk‐heterojunction blends exhibit electric field dependent J–V curves, while others do not. Through detailed fs‐μs transient

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Can enhanced exciton diffusion improve light harvesting in solar cells?

In particular, enhanced exciton diffusion can improve light harvesting in solar cells that can be manufactured using water-based solutions of electron donor and acceptor nanoparticles or by sequential deposition of donor and acceptor, offering low-cost and environmentally friendly production.

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Exciton Diffusion in Conjugated Polymers: From Fundamental

Aug 13, 2015· Upon light absorption, singlet excitons are promptly generated in organic materials instead of charge carriers because the dielectric constant (ε r) is small (∼3–4), which is in sharp contrast to inorganic and perovskite solar cells.

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Direct observation of exciton–exciton interactions

Jun 25, 2018· Natural light harvesting as well as optoelectronic and photovoltaic devices depend on efficient transport of energy following photoexcitation. Using common spectroscopic methods, however, it is

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Boosted Solar Light Absorbance in PdS

Sep 1, 2021· Transition-metal dichalcogenides (TMDs) represent a class of materials whose archetypes, such as MoS2 and WS2, possess exceptional electronic and optical properties and have been massively exploited in optoelectronic applications. The layered structure allows for their exfoliation to two-dimensional samples with atomic thickness (≲ 1 nm), promising for

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Boosted Solar Light Absorbance in PdS2/PtS2 Vertical

more efficient, atomic-thin photovoltaic devices. KEYWORDS: photovoltaics, TMDs, van der Waals heterostructures, 2D materials, excitons 1. INTRODUCTION Two-dimensional (2D) materials have elicited great attention over the last few decades thanks to their unique electronic and optical properties induced by their atomic-scale thickness.1−3 A

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Maximizing Performance and Stability of Organic Solar Cells at

The predictors are: X 70PCBM: weight fraction of [70]PCBM, T B: boiling point of solvent, A tot: total absorption in exciton band of DT-Y6, D tot: total absorption in exciton band of PM6, w A: spectral width of single vibronic of exciton band of DT-Y6, c A: DT-Y6 exciton energy, h A: Huang-Rhys factor of single effective vibronic transition of

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Sub-picosecond, strain-tunable, polarization-selective optical

Sep 6, 2024· In cutting-edge optical technologies, polarization is a key for encoding and transmitting vast information, highlighting the importance of selectively switching and modulating polarized light.

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Exciton Dynamics and Electron-Phonon Coupling Affect the Photovoltaic

Oct 25, 2018· Request PDF | Exciton Dynamics and Electron-Phonon Coupling Affect the Photovoltaic Performance of the Cs 2 AgBiBr 6 Double Perovskite | Lead-free double perovskites have been proposed as

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Flexible organic solar cells: Materials, large-area fabrication

Nov 1, 2021· Flexible electronics as emerging fields will be the key technologies that are related to our daily life in the future [1], [2].Electronics devices with flexibility, such as electronic skin with different sensors [3], [4], flexible organic light-emitting diodes [5], field-effect transistors [6], [7] and photovoltaics [8], have the advantage of light-weight, easy fabrication via printing

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Facile Preparation of Large-Area, Ultrathin, Flexible Semi

May 27, 2024· The development of emerging photovoltaic technology has promoted the innovation of building-integrated photovoltaics (BIPV) not only in lower cost and simpler processing technology but also in a variety of additional features such as flexibility and transparency. Semitransparent solar cells that allow partial transmission of visible light are

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Exciton transport in molecular organic semiconductors boosted by

May 19, 2022· This equation for exciton propagation is formally equivalent to the one used before for charge propagation in FOB-SH non-adiabatic dynamics 8,9,16; Frenkel exciton states merely replace hole or

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Long exciton diffusion distance and efficient exciton dissociation

Aug 1, 2024· Organic solar cells (OSCs) use organic semiconductors as light absorbing materials and have exclusive advantages including tuneable light absorbing wavelength [8], light-weighting [9], compatibility with flexible substrates [10], short energy payback time [11].Recent 10 years witnessed the rapid development of OSCs with the PCE of single junction devices

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Tunable long-lived exciton lifetime in single-layer two

flexible thin-film solar cells, but also suggest one of the possible ways to design the thin-film solar cells. DOI: 10.1103/PhysRevMaterials.6.104001 I. INTRODUCTION Applicable materials for solar cells are of great importance for energy-harvesting technologies [1–3]. Recently, tremen-dous efforts have been made to achieve ultrathin

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Efficient Ultrathin Self‐Powered Organic Photodetector with

These findings illustrate a clear correlation between the exciton dissociation process, photogenerated exciton yields, and energy transfer self-powered OPDs were usually constructed with photovoltaic mode to convert the photon energy to usable electric power to support self-operation. the construction of ultrathin organic

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Engineering ultrafast exciton dynamics to boost organic

Oct 14, 2024· Importantly, our results reveal that Y-type acceptors with moderately reduced intermolecular interaction strength can generally achieve faster exciton migration, better structural uniformity and higher device performance, thereby providing insights for future OPV material development and engineering. You have access to this article.

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Enhancing Exciton Diffusion Length Provides New

friendly production of flexible and lightweight solar cells. Techniques to measure exciton diffusion The exciton motion by a random walk can be quantified by the exciton diffusion coefficient D which could be isotropic or anisotropic. In the literature it is common to define the average exciton diffusion length as 𝐿𝑍𝐷=√𝑍𝐷 𝜏

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Excitons and emergent quantum phenomena in stacked 2D

Nov 17, 2021· This Review discusses the exciton physics of transition metal dichalcogenides, focusing on moiré patterns and exciton many-body physics, and outlines future research directions in the field.

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Recent progress in solution-processed flexible organic photovoltaics

Oct 30, 2022· The certified power conversion efficiency (PCE) of organic photovoltaics (OPV) fabricated in laboratories has improved dramatically to over 19% owing to the rapid development of narrow-bandgap

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Enhancing Exciton Diffusion Length Provides New Opportunities

Aug 1, 2020· Exciton behavior plays a crucial role in the photovoltaic conversion process of organic solar cells (OSCs) and quantum‐dot solar cells (QDSCs). Great progress has been made to regulate the

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About Exciton correlation dynamics in flexible ultrathin photovoltaics

About Exciton correlation dynamics in flexible ultrathin photovoltaics

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