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Exciton correlation dynamics in flexible ultrathin photovoltaics

Flexible organic solar cells: Materials, large-area fabrication

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

Direct observation of exciton–exciton interactions

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

Exciton diffusion in two-dimensional metal-halide perovskites

A clear correlation between lattice stiffness and diffusivity is found, suggesting exciton–phonon interactions to be dominant in the spatial dynamics of the excitons in perovskites, consistent

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

New Insights into the Correlation between Morphology, Excited

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

Recent progress in solution-processed flexible organic photovoltaics

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

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

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.

Exciton transport in molecular organic semiconductors boosted by

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

Enhancing Exciton Diffusion Length Provides New Opportunities

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.

Overview: Photovoltaic Solar Cells, Science, Materials, Artificial

Although ultra-thin photovoltaics was initially limited to small scale devices large-area, ultra-thin organic PV modules have been produced for all layers with scalable solution-based processes with additional transfer to light-weight/high strength composite fabrics, yielding durable fabric-PV systems ~50μ thin, under 1 g weight modules, i.e

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

@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

Correlating the Hybridization of Local‐Exciton and

1 Introduction. The power conversion efficiencies (PCE) of single-junction organic solar cells (OSCs) have currently been pushed to 19%. [1-5] One of the breakthroughs accounting for this striking progress in the PCEs of OSCs has been decreasing the energetic offset (ΔE LE − CT) values between charge-transfer (CT) and local-exciton (LE) states at the donor-acceptor

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

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.

Engineering ultrafast exciton dynamics to boost organic

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.

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

Boosted Solar Light Absorbance in PdS

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

Exciton Diffusion in Conjugated Polymers: From Fundamental

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.

Long exciton diffusion distance and efficient exciton dissociation

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

Enhancing Exciton Diffusion Length Provides New Opportunities

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

Third Generation Photovoltaics based on Multiple Exciton

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

Long-range exciton diffusion in molecular non-fullerene acceptors

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

Exciton Binding Energies in Organic Photovoltaic Materials: A

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.

Long-range exciton diffusion in molecular non-fullerene acceptors

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...

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.

Ultra-flexible Semitransparent Organic Photovoltaics

This characteristic makes ITO unsuitable for flexible components, limiting its application within the versatile, dynamic environments organic solar cells aim to service. In pursuit of improved mechanical stability and enhanced transparency, we have developed highly flexible, transparent electrodes, namely the metal thin film electrode 2 and the

Direct observation of ultrafast coherent exciton dynamics in

Since the degree of electronic correlation between delocalized molecular sites is reflected in vibronic coupling, the dynamic information about exciton delocalization size can be deduced by

Exciton physics and device application of two-dimensional

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

Flexible Organic Solar Cells: Progress and Challenges

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

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

Exciton Dynamics and Electron-Phonon Coupling Affect the Photovoltaic

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

Facile Preparation of Large-Area, Ultrathin, Flexible Semi

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

Physical insights into non-fullerene organic photovoltaics

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...

Exciton optics, dynamics, and transport in atomically thin

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

Long exciton diffusion distance and efficient exciton dissociation

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.

Exciton correlation dynamics in flexible ultrathin photovoltaics [PDF]

6 FAQs about [Exciton correlation dynamics in flexible ultrathin photovoltaics]

What is exciton diffusion length in organic photovoltaics?

Provided by the Springer Nature SharedIt content-sharing initiative 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 domains within the photoactive layer of the cell.

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.

Can enhanced exciton diffusion improve light harvesting in solar cells?

How long is exciton diffusion in organic bulk heterojunction solar cells?

The short-range diffusion length of organic semiconductors severely limits exciton harvesting and charge generation in organic bulk heterojunction solar cells. Here, the authors report exciton diffusion length in the range of 20 to 47 nm for a wide range of non-fullerene acceptors molecules.

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.

Can 3D exciton diffusion length be increased beyond 40 nm?

In summary, recent studies have shown that 3D exciton diffusion length in thin films of organic semiconductors can be increased beyond 40 nm by processing. This enables the use of larger donor and acceptor domain sizes in BHJs, which improve charge pair dissociation and extraction efficiencies.