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Open research questions in Organic Electronics and Photovoltaics

98 gap statements mined from Organic Electronics and Photovoltaics papers in our 4.5M-paper local library, which holds 1,032 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

What the literature leaves open

  • The calculation of triplet-pair eigenstates is challenging due to the need for correlated-electron calculations. The interpretation of the results requires careful consideration of the electronic structure of the states. The comparison to experimental results is necessary to validate the calculations.

    Correlated-electron theory of triplet–triplet multiexciton states in polypentacene · 2026 · DOI

  • The ductility requirements for flexible devices are not met by small molecule acceptors. There is a need to enhance mechanical and photovoltaic properties of flexible organic solar cells.

    Synergistic Multimodal Energy Dissipation Enhances Certified Efficiency of Flexible Organic Photovoltaics beyond 19% · 2024 · DOI

  • Further research is needed to understand the effects of torsional angle on the iSF rate, - The possibility of intermolecular singlet fission in films with appreciable interchain interactions should be explored, - More studies on the electronic structure of polypentacene and polytetracene solutions are necessary

    Correlated-electron theory of triplet–triplet multiexciton states in polypentacene · 2026 · DOI

  • However, thermal treatment at temperatures exceeding the transition point of the liquid-crystalline phase degrades device performance, and the relationship between structure and performance remains unclear.

    Understanding the Structure–Performance Relationship for Organic Thin-Film Transistors Using Liquid-Crystalline Organic Semiconductors · 2026 · DOI

  • Abstract Ground-state charge generation (GSCG) offers a potent yet underexplored avenue for trap engineering in organic solar cells (OSCs), provided it can be harnessed without disrupting the bulk heterojunction morphology.

    Ground-State Charge Generation-Enabled Nondestructive Defect Passivation in Organic Photovoltaics · 2026 · DOI

  • However, a comprehensive study on the synthesis strategies and photonic applications of organic micro/nanostructures with high‐level dimension morphologies is still lacking.

    Multidimensional Organic Photonic Micro/Nanostructures: From Precise Syntheses to Photonic Applications · 2026 · DOI

  • The generation of photocurrent in free acceptor-based CPP has rarely been reported in the previous literature.

    Naphthalene Diimide-Embedded Donor–Acceptor Carbon Nanohoops: Photophysical, Photoconductive, and Charge Transport Properties · 2025 · DOI

  • However, research on the application of SAMs in ultrathin flexible OSCs remains insufficient.

    High‐Performance Ultrathin Flexible Organic Solar Cells Through the Modification of Self‐Assembled Monolayers · 2025 · DOI

  • Abstract Metal–organic complexes have demonstrated excellent performance in organic light‐emitting diodes, yet their potential in organic solar cells (OSCs) remains underexplored.

    A Platinum Complex‐Based Dimerized Electron Acceptor for Efficient Organic Solar Cells · 2025 · DOI

  • However, the role of their central electron‐deficient unit (Aʹ) in determining photovoltaic performance remains incompletely understood.

    Electronegativity‐Engineered Multidimensional Interactions Enable 20% Efficiency Organic Solar Cells · 2025 · DOI

  • Thickness‐resilient donor:acceptor blends are, however, scarce and not fully understood.

    What Makes Thickness‐Tolerant Organic Solar Cells? · 2025 · DOI

  • Despite their potential, the interplay between molecular structure, aggregation behavior, and photovoltaic performance remains poorly understood, limiting the ability to rationally design materials with optimal stability and efficiency.

    Stacking Matters – A Spectroscopic Overview from SMAs to PSMAs in Organic Solar Cells · 2025 · DOI

  • Compared with those of inorganic and perovskite solar cells, the power conversion efficiencies of organic solar cells (OSCs) are severely limited by a large energetic disorder.

    Toward Low Energetic Disorder in Organic Solar Cells: The Critical Role of Polymer Donors · 2025 · DOI

  • In analogous devices using semiconducting single-walled carbon nanotubes (s-SWCNTs), similar doping strategies have been studied for the enhancement of thermoelectrics, light-emitting diodes, and transistors, but virtually no studies have examined the impact of doping on photovoltaic behavior.

    P-Doped Carbon Nanotubes as Light-Absorbing Electron Donors in Photovoltaics · 2025 · DOI

  • However, the impact of doping on intrinsic polymer mechanical properties, such as the elastic modulus, in ultrathin films at device-relevant thicknesses is not well understood and has not been directly measured.

    Impact of Sequential Chemical Doping on the Thin Film Mechanical Properties of Conjugated Polymers · 2025 · DOI

  • While it has been previously hypothesized that charge predominantly localizes on the naphthalene diimide (NDI) unit during reductive charging, specific changes in atomic environments that confirm this localization have not been characterized in n-type polymers.

    Spectroscopic Investigation into P(NDI2OD-T2) Charge Localization · 2025 · DOI

  • However, limited studies have focused on the intrinsic stability and synthesis procedures of CIMs.

    Alcohol-Soluble Conjugated Polymers Enable Highly Efficient and Stable Organic Solar Cells Through a Main-Chain Modulation Strategy · 2025 · DOI

  • High Resolution Image Download MS PowerPoint Slide Carbazole-derived self-assembled monolayer (SAM) materials as hole transport layers are widely used in organic photovoltaics, yet the role of subtle substituent effects on interfacial structure and device performance remains underexplored.

    Organic Solar Cells with 20.12% Efficiency Enabled by Monosubstituted Carbazole-Based Self-Assembled Monolayers · 2025 · DOI

  • The power factor (PF) in doped conjugated polymers is fundamentally constrained by a trade-off between electrical conductivity and the Seebeck coefficient, yet the underlying universal limit remains unclear.

    Universal Soft Coulomb Gap Governs Thermoelectric Performance in Doped Conjugated Polymers · 2025 · DOI

  • Since this observation may not be universal to all polymer systems, future research should focus on identifying their limiting photophysical processes.

    Electrolyte Immersion Increases Photoconductivity in a Model Polymer Photocathode · 2025 · DOI

  • Little is known about the spin polaron pairs (PPs) dependent dissociation and nonradiative decay at charge transfer states (CTS), where the coherent spin mixing plays a key role.

    Coherent spin mixing at charge transfer states for spin polaron pair dissociation and energy loss in organic bulk heterojunction solar cells · 2025 · DOI

  • This straightforward synthetic approach yields a compound with exceptional methanol solubility, addressing a key limitation of conventional materials.

    Sulfur‐Containing Perylene Diimide Derivative as Electron Transport Layer in Organic Photovoltaics · 2025 · DOI

  • Therefore, the details of charge transport at the molecular level have not been clarified.

    Elucidation of molecular-level charge transport in an organic amorphous system · 2025 · DOI

  • Despite the numerous reviews on the acceptor materials, there are scarcely any comprehensive summaries focusing on aromatic side chains optimized Y6 acceptors.

    Recently progress of aromatic side chain engineering on Y6 for high performance organic solar cells · 2025 · DOI

  • While this delocalization is generally understood to be maximized by coplanar monomer arrangements that enable π-orbital overlap, the precise geometric factors controlling delocalization remain incompletely characterized.

    Quantifying the Effect of Intermonomer Improper Angles on Electron Delocalization in Conjugated Polymers · 2025 · DOI

Most-cited papers in Organic Electronics and Photovoltaics

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98 gap statements have been mined from Organic Electronics and Photovoltaics papers in our 4.5M-paper local library, which holds 1,032 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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