80% Fill Factor in Organic Solar Cells with a Modified Nickel Oxide Interlayer

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 5, 2025

Abstract The efficiency of organic solar cells has raised drastically in the past years. However, there is an undeniable lack hole transport layers that can provide high carrier selectivity, low defect density, and processing robustness, simultaneously. In this work, issue addressed by studying generation surface passivation nickel oxide (NiO x ). It revealed oxidation state species on NiO lowers contact resistance but hinders charge extraction when employed as layer cells. By using them coordination centers, a straightforward modification strategy implemented (2‐(9H‐carbazol‐9‐yl)ethyl)phosphonic acid (2PACz) enhances increases cell from 11.46% to 17.12%. Additionally, robustness across different deposition methods carbazole molecule demonstrated. Finally, fine‐tuning Fermi level various carbazole‐based molecules, particular with ((4‐(7H‐dibenzo[c,g]carbazol‐7‐yl)butyl)phosphonic (4PADCB), power conversion 17.29% achieved, outstanding combination V OC 0.888 fill factor 80%.

Language: Английский

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Layered All‐Polymer Solar Cells with Efficiency of 18.34% by Employing Alloyed Polymer Donors

Small, Journal Year: 2025, Volume and Issue: 21(11)

Published: Feb. 7, 2025

Abstract A series of layered all‐polymer solar cells (LA‐PSCs) with the normal or inverted structure are prepared by employing a sequential spin‐coating method PBQx‐TCl, PM1 as polymer donor, and PY‐DT acceptor. The power conversion efficiency (PCE) LA‐PSCs can be improved from 17.20% to 18.34% incorporating 30 wt.% into PBQx‐TCl layer, resulting simultaneously increased J SC 25.35 mA cm −2 , V OC 0.971 FF 74.49%. PCE improvement also achieved PBQx‐TCl:PM1 donor layers. mixed prefer form alloyed states in LA‐PSCs, which confirmed gradually s more content Meanwhile, photogenerated excitons layers dissociated at interface between PM1, especially for located near ITO electrode. exciton dissociation provide an additional channel improving utilization efficiency, positive external quantum spectral difference (∆EQE) values Over 6.6% realized using layer.

Language: Английский

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Post-Treatment Free Yttrium Phosphotungstate Anode Interfacial Material for Organic Solar Cells with 20.55% Efficiency

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 2045 - 2051

Published: April 1, 2025

Language: Английский

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Strategies to achieve efficiencies of over 19% for organic solar cells

Cell Reports Physical Science, Journal Year: 2025, Volume and Issue: 6(1), P. 102390 - 102390

Published: Jan. 1, 2025

Language: Английский

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Phase Behavior of Conjugated Polymer Solutions and Blends: The Flory–Huggins Lattice Model

The Journal of Physical Chemistry C, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 11, 2025

Language: Английский

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Suppressing Voltage Loss and Improving Charge Generation via Fluorinated Molecular Backbone of Low-Cost Polymers for Efficient Organic Solar Cells

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 25, 2025

High efficiency and low cost are indispensable for the industrialization of organic solar cells (OSCs), which urgently needs to be addressed. Herein, three simple-structure terpolymer donors, PTQ13-5, PTQ13-10, PTQ13-15, developed by embedding a simple fluorinated unit 3-fluorothiophene (T-F) into molecular backbone polymer PTQ10 pursue low-cost high-efficiency photovoltaic molecules. Three terpolymers show obviously characteristics due their short synthesis routes high total synthetic yields from cheap raw materials. The introduction T-F leads blue-shifted absorption, down-shifted HOMO levels, more favored aggregation morphology terpolymers, mainly strong electron-withdrawing property F atom, along with presence noncovalent F···H interactions. As result, PTQ13-5-based OSC achieves enhanced power conversion (PCE) 18.42% suppressed voltage loss (Vloss) because nonradiative 0.189 eV charge generation; this is one highest PCEs OSCs based on This work suggests that fluorination an effective strategy suppress Vloss improve generation OSCs, it offers rational guide in design molecules performance.

Language: Английский

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Effects of Additional Flexible and Rigid Structure on BDT-BDD Terpolymer and the Performance of Organic Solar Cells

Polymers, Journal Year: 2025, Volume and Issue: 17(2), P. 248 - 248

Published: Jan. 20, 2025

In organic solar cells, the aggregation and crystallization of polymers are significant for bulk heterojunction. Blending with acceptor materials, polymer donor materials can adjust their by movement chain segments. this paper, unfused structures based on thiophene carbazole respectively designed introduced into donor-acceptor copolymer to investigate influence flexible rigid polymer-aggregation leading photoelectric performance. The material quantum chemical property investigations show that selection design blocks important properties terpolymers, resulting polymer:Y6 devices achieve improvements in performance from 13.85% 15.66% (especially fill factors 63.37% up 69.81%). This result contributes designing optimizing efficient polymers.

Language: Английский

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Molecular Reconstruction for the High‐Performance Recycled Fluororubbers

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 9, 2025

Abstract To address the challenges associated with difficult recycling of fluorinated specialty materials and subpar performance recycled products, a molecular reconstruction strategy oxidative degradation, fluorination addition is reported, end‐group transformation, which upcycled waste fluororubber into high‐performance, chemically awakenable amino‐terminated low‐molecular‐weight fluoropolymer (ATLF‐Boc). Leveraging chemical properties vinylidene fluoride structure in fluororubber, carboxyl‐terminated (CTLF) controlled weight content are synthesized. Further, whole chain structurally strengthened at scale to achieve higher fluorine thermal stability, saturated (SCTLF) Subsequently, balance high reactivity stable storage, high‐performance ATLF‐Boc synthesized, realizing upcycling fluororubber. After upcycling, awakened ATLF exhibits (66.95%), cured shows regulation surface hydrophilicity hydrophobicity (between 43° 114°), tensile strength 13.3 MPa, an excellent stability (T 10% = 359 °C). In this study, novel solution for fluororubbers fabricating functional offered, great significance field materials.

Language: Английский

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Completely Fused Non‐Fullerene Acceptor Enables Efficient Postprocessing‐Free Organic Photovoltaics Cells

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 11, 2024

Abstract The photovoltaic performance of organic (OPV) cells can be significantly improved by regulating the aggregation structure and film formation kinetics constituent materials. However, many regulation strategies, including use additives annealing, require complex fabrication processes additional investments, which poses challenges for industrialization OPV cells. In this work, a completely fused non‐fullerene acceptor, GS‐20 is designed synthesized, with strong properties. incorporation as third component into PBQx‐TF:eC9‐2Cl‐based cell accelerates eC9‐2Cl improves molecular stacking promoting deposition. as‐cast ternary fabricated without any post‐treatments exhibited high V OC 0.890 maximum PCE 19.0%. Moreover, postprocessing‐free module using blade coating method obtains satisfactory 13.5%, indicating excellent feasibility large‐scale preparation. This work realizes an efficient through design strategy, facilitating technology.

Language: Английский

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Polyfluoride Acceptor with Limited Molecular Diffusion Enables Efficient and Stable Ternary Organic Solar Cells

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(35), P. 46332 - 46340

Published: Aug. 23, 2024

Due to the slow diffusion of photovoltaic molecules, in particular, small-molecule acceptors (SMAs), under light and heating, morphology active layer organic solar cells (OSCs) prefers deviate from favorably metastable status, leading challenge stability during long-term operation. Employing materials with a high glass transition temperature (Tg) as third component suppress molecular is an efficient method achieve balance efficiency OSCs. Herein, dimerized acceptor denoted F6D synthesized by introducing polyfluoride moiety linker enhance Tg. Benefitting rational design, not only exhibits higher Tg, complementary absorption, cascade energy levels host polymer donor PM6 SMA Y6 but also has excellent miscibility multiple intermolecular interactions Y6. As result, champion power conversion 17.52% achieved optimal PM6:Y6:F6D-based device. More importantly, ternary device superior continuous heating lighting compared binary

Language: Английский

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