Leveraging Multilayer Hole Selective Layers to Boost Organic Photovoltaic Power Conversion Efficiency

ACS Applied Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 19, 2025

Hole selective layers (HSLs) play a crucial role in the efficiency of organic photovoltaics (OPVs). Self-assembled monolayers (SAMs) offer powerful approach to engineer interfacial properties HSLs OPVs. In this work, we utilized 2-(9H-carbazol-9-yl)ethyl)phosphonic acid (2PACz) SAM modify ITO/MoO3 interface and surface MoO3, thereby forming multilayer HSLs. 2PACz regulates work function (WF) electrodes, leading more favorable energy level alignment, reduced resistance, facilitated charge carrier transport extraction. The resulting OPV devices demonstrated improved fill factor (FF) power conversion (PCE). Additionally, reduction defects effectively suppressed recombination, ultimately achieving maximum PCE 16.33%. This indicates that design composite with modification is an effective strategy for improving provides ideas further advancing development.

Язык: Английский

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Achieving 19.3%-efficiency binary organic solar cells via synergistically dual-phases morphology control

Chemical Engineering Journal, Год журнала: 2025, Номер 506, С. 160133 - 160133

Опубликована: Янв. 1, 2025

Язык: Английский

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Comparative study on charge photogeneration dynamics of Y small molecule and polymerized Y small molecule based polymer solar cells

The Journal of Chemical Physics, Год журнала: 2025, Номер 162(5)

Опубликована: Фев. 3, 2025

Understanding charge photogeneration processes in polymer solar cells utilizing polymerized Y-molecule acceptors (PYMAs) is of great importance for design and optimization high-performance cells. In this work, excited state dynamics PYMAs (PYT, PY-DT) corresponding were comparably studied with those Y small molecules (Y5, Y6) by using the steady time-resolved spectroscopies as well time-dependent density functional theory calculation. We find that PYMA films exhibit smaller Stokes shifts than molecules, indicating a more rigid backbone PYMAs. Temperature-dependent steady-state PL measurement reveals compared to molecule films, energy barrier from radiative non-radiative states films. addition, transient absorption spectroscopy demonstrates exciton diffusion process PYT PY-DT are mainly intra-chain mechanism coefficients 1.7 × 10−2 2.7 cm2 s−1, respectively, contrast inter-molecular Y5 Y6 For blend phase sizes PM6:PYT PM6:PY-DT determined 2.3 3.3 nm, (4.7 nm) PM6:Y6 film. unlike bimolecular recombination classical system PM6:Y6, PYMA-based all-polymer geminate type ultrafast timescale. carrier lifetime plays critical role performance This work provides comprehensive understanding photophysical properties PYMAs, which pivotal designing highly efficient

Язык: Английский

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Asymmetric small-molecule acceptor enables suppressed electron-vibration coupling and minimized driving force for organic solar cells

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Фев. 10, 2025

Abstract Minimizing the energy loss, particularly non-radiative loss (Δ E nr ), without sacrificing charge collection efficiency, is key to further improve photovoltaic performance of organic solar cells (OSCs). Herein, we proposed an asymmetric molecular design strategy, via developing alkyl/thienyl hybrid side chain based small molecule acceptors (SMAs) BTP-C11-TBO and BTP-BO-TBO, manipulate intermolecular interactions realize enhanced luminescence efficiency reduced loss. Theoretical experimental results indicate that compared three symmetric SMAs BTP-DC11, BTP-DTBO BTP-DBO, BTP-BO-TBO exhibit repressed electron-vibration coupling Δ . Moreover, nature allows formation multiple D:A interfacial conformations energies, which have made charge-transfer state energies closer strongly absorbing (and emitting) local-exciton state, thus gaining low while maintaining efficient exciton dissociation. Consequently, PM6:BTP-BO-TBO-based OSCs achieve a higher power conversion 19.76%, with high open circuit voltage 0.913 V fill factor 81.17%, profiting from more improved balanced mobility longer carrier lifetime. This work provides ideas suppress nonradiative decay paves way obtain high-performance OSCs.

Язык: Английский

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Fingerprint Recognition Matrix Based on Photomultiplication-Type Organic Photodetectors with a Signal-to-Noise Ratio of 51,400

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Фев. 27, 2025

Large-area and highly sensitive image sensors are vital for undercell fingerprint recognition technology. The photomultiplication-type organic photodetector (PM-OPD) is one of the alternative choices due to its special active layers with ratio donor acceptor by weight about 100:3 achieving single charge carrier transport channels, resulting in relatively low dark current density high external quantum efficiency under bias. optimal PM-OPDs exhibit a maximal 2.1 × 1012 Jones specific detectivity at 610 nm -6 V bias signal-to-noise 51,400 -5.2 Solution-processed were prepared onto top polycrystalline-silicon thin-film transistor readout circuit, successfully realized 338 pixels resolution per inch. electrical optical properties sensor investigated, high-quality images obtained.

Язык: Английский

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Achieving light utilization efficiency of 3.88% and efficiency of 14.04% for semitransparent layer-by-layer organic solar cells by diluting donor layer

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161148 - 161148

Опубликована: Фев. 1, 2025

Язык: Английский

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Minimizing Energy Loss by Designing Multifunctional Solid Additives to Independent Regulation of Donor and Acceptor Layers for Efficient LBL Polymer Solar Cells

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Март 20, 2025

Solid additives are crucial in layer-by-layer (LBL) polymer solar cells (PSCs). Despite its importance, the simultaneous application of solid into both donor and acceptor layers has been largely overlooked. In this work, two multifunctional actively designed, investigated synergistic effect on layers. Incorporating layer could effectively enhance aggregation molecular stacking polymer, leading to reduced energy disorder minimizing ΔE2. When introduced layer, they just play a role optimizing morphology, thereby reducing ΔE3. Excitedly, addition produced for decreasing ΔE2 ΔE3 simultaneously, especially adding SA2, thus enabling an excellent power conversion efficiency (PCE) 19.95% (certified as 19.68%) with open-circuit voltage (Voc) 0.921 V, short circuit current density (Jsc) 27.08 mA cm-2 fill factor (FF) 79.98%. The work highlights potential independently regulating properties layers, which is expected promising approach further developing higher performance PSCs.

Язык: Английский

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A critical review on the progress of emerging active and substrate materials for organic solar cells and device level fabrication techniques by solution process method

Next Materials, Год журнала: 2025, Номер 8, С. 100595 - 100595

Опубликована: Март 22, 2025

Язык: Английский

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Cost‐Effective Perylene‐Diimide Non‐Conjugated Polymer as Cathode Interlayer for Large‐Scale Production of Organic Photovoltaics

Small, Год журнала: 2025, Номер unknown

Опубликована: Апрель 1, 2025

Abstract At present, organic solar cells (OSCs) stand at a key stage of industrialization. Although many photovoltaic materials exhibit outstanding performance, they cannot meet the requirements for large‐scale production. Here, cost‐effective and high‐throughput method is reported to prepare Perylene/naphthalene‐diimide (PDI/NDI) non‐conjugated polymers serving as cathode interlayer (CIL) in OSCs. By utilizing low‐cost raw materials, NDI/PDI can be readily synthesized without involving purification by column chromatography, which minimizes cost CILs. Notably, performance PDI‐OEG CIL insensitive preparation conditions processing methods, thereby lowering technical threshold practical applications, essentially important using binary blend PM6:L8‐BO an active layer, OSC modified exhibited power conversion efficiency (PCE) 18.7%. It demonstrated that suitable work function, self‐doping effect, H‐aggregate endowed with excellent electron collection capability, suppress charge recombination Moreover, well‐compatible large‐area blade‐coating technique, 1‐cm 2 fabricated blade‐coated PDI‐OEG, delivering PCE 17.0%. The results suggest promising material advancing industrialization technology.

Язык: Английский

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Examining the Relationship between Synthetic Accessibility and Efficiency in Organic Solar Cells: A Statistical Analysis

ACS Applied Energy Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 31, 2025

Язык: Английский

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