Halogenation Strategy of Thiophene Derived Solvent Additives Enables Optimized Morphology for Organic Solar Cells with 19.17% Efficiency

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(19)

Published: Jan. 14, 2024

Abstract As simple and versatile tools, additives have been widely used to refine active layer morphology played a crucial role in boosting the power conversion efficiency (PCE) of organic solar cells (OSCs). Herein, three novel solvent named Th‐FSi, Th‐ClSi, Th‐BrSi with same backbone 2,5‐bis(trimethylsilyl)thiophene are designed synthesized by substituting different halogens fluorine, chlorine, bromine, respectively. Notably, Th‐ClSi exhibits more significant dipole moment engages non‐covalent interactions small‐molecule acceptor (SMA) L8‐BO, which slight adjustments intermolecular interaction, crystallinity, molecular packing PM6:L8‐BO layer. Consequently, OSCs incorporating outperform their Th‐FSi counterparts photo‐capturing, reduced energy loss, superior exciton dissociation, charge transfer properties, out‐coming yields an enhanced PCE 18.29%. Moreover, integrating near‐infrared absorbing SMA (BTP‐eC9) guest into matrix, absorption spectrum span 880–930 nm, resultant ternary achieve commendable 19.17%, ranking among highest efficiencies reported date is expanded. These findings underscore promise halogenated thiophene‐based as potent avenue for morphological fine‐tuning consequent enhancement OSCs.

Language: Английский

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High‐Performance Photoactive Polymers: Innovations in Ternary Polymerization for Solar Applications

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

Published: Feb. 2, 2025

Abstract In recent years, polymer solar cells (PSCs) have achieved rapid progress, with power conversion efficiencies (PCEs) reaching up to 20.25%, driven by significant advancements in device fabrication and active‐layer materials. The ternary polymerization strategy has proven be a straightforward effective approach for developing high‐performance photoelectric polymers incorporating third monomer into the backbone. This incorporation effectively optimizes intrinsic properties, including UV–vis absorption, energy levels, solubility, crystallinity, morphology, charge transfer, mechanical robustness, batch‐to‐batch reproducibility, stability. review highlights latest designing photoactive copolymers (both donors acceptors), particular focus on stability, potential applications commercial development. aim is provide valuable guidance development of materials using strategy.

Language: Английский

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Exploiting the donor‐acceptor‐additive interaction's morphological effect on the performance of organic solar cells

Aggregate, Journal Year: 2023, Volume and Issue: 5(2)

Published: Nov. 6, 2023

Abstract Organic solar cells (OSCs) have demonstrated over 19% power conversion efficiency (PCE) with the help of material innovation and device optimization. Co‐working newly designed materials, traditional solvent additives, 1‐chloronaphthalene (CN), 1,8‐diodooctane (DIO) are still powerful in morphology modulation towards satisfying efficiencies. Here, we chose recently reported high‐performance polymer donors (PM6 & D18‐Fu) small molecular acceptors (Y6 L8‐BO) as active layer materials processed them by different conditions (CN or DIO none). Based on corresponding 12 groups results, their film characterizations (both ex‐situ in‐situ ones), property‐performance relationships revealed case case. It is thereby supposed to be taken a successful attempt demonstrate importance complexity donor‐acceptor‐additive interaction, since performance physics analyses also tightly combined variation. Furthermore, ternary blend construction for PCE improvement provides an approaching level showcases potential understanding‐guided‐optimization (UGO) future OSCs.

Language: Английский

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Cyanoesterthiophene Based Low‐Cost Polymer Donors for High Efficiency Organic Solar Cells

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(19)

Published: Jan. 11, 2024

Abstract To achieve commercial application of organic solar cells (OSCs), it is necessary to reduce material costs and improve device efficiency. This paper reports on the utilization a multifunctional building block, namely 3‐cyanoesterthiophene, which exhibits simple structure accessibility synthetic for cost‐effective high‐performance polymer donors (PDs). Meanwhile, ternary terpolymerization strategies have been studied. Two similar PDs, PBTCl0‐TCA PBTCl100‐TCA, are synthesized, devices exhibit less‐than‐satisfactory efficiency 13.21% 11.53% due mismatching energy level imperfect morphology. The two PDs with comparable structures commendable compatibility easily form alloy‐like phase in active layer, can effectively boost 14.17% retained high J SC significant improved open‐circuit voltage ( V OC ) fill factor (FF). Encouraged by blending phenomenon, donor (PBTCl50‐TCA) same ratio random designed. And over 17% binary OSCs using demonstrated. synergies incorporation cyanoester‐group terpolymer endow developed deep‐lying levels, face‐on orientation, thermodynamic miscibility prevailing nonfullerene acceptor appropriate crystallinity. findings study provide valuable insights support advancement PDs.

Language: Английский

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Halogenated Dibenzo[f,h]quinoxaline Units Constructed 2D‐Conjugated Guest Acceptors for 19% Efficiency Organic Solar Cells

Advanced Science, Journal Year: 2024, Volume and Issue: 11(31)

Published: June 17, 2024

Abstract Halogenation of Y‐series small‐molecule acceptors (Y‐SMAs) is identified as an effective strategy to optimize photoelectric properties for achieving improved power‐conversion‐efficiencies (PCEs) in binary organic solar cells (OSCs). However, the effect different halogenation 2D‐structured large π‐fused core guest Y‐SMAs on ternary OSCs has not yet been systematically studied. Herein, four 2D‐conjugated (X‐QTP‐4F, including halogen‐free H‐QTP‐4F, chlorinated Cl‐QTP‐4F, brominated Br‐QTP‐4F, and iodinated I‐QTP‐4F) by attaching halogens into 2D‐conjugation extended dibenzo[ f , h ]quinoxaline are developed. Among these X‐QTP‐4F, Cl‐QTP‐4F a higher absorption coefficient, optimized molecular crystallinity packing, suitable cascade energy levels, complementary with PM6:L8‐BO host. Moreover, among PM6:L8‐BO:X‐QTP‐4F blends, PM6:L8‐BO:Cl‐QTP‐4F obtains more uniform size‐suitable fibrillary network morphology, well vertical phase distribution, thus boosting charge generation, transport, extraction, suppressing loss OSCs. Consequently, PM6:L8‐BO:Cl‐QTP‐4F‐based achieve 19.0% efficiency, which state‐of‐the‐art based superior devices host (17.70%) guests H‐QTP‐4F (18.23%), Br‐QTP‐4F (18.39%), I‐QTP‐4F (17.62%). The work indicates that promising gain efficient

Language: Английский

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Side‐chain symmetry‐breaking strategy on porphyrin donors enables high‐efficiency binary all‐small‐molecule organic solar cells

SusMat, Journal Year: 2024, Volume and Issue: 4(3)

Published: May 10, 2024

Abstract Side‐chain symmetry‐breaking strategy plays an important role in developing photovoltaic materials for high‐efficiency all‐small‐molecule organic solar cells (ASM OSCs). However, the power conversion efficiencies (PCEs) of ASM OSCs still lag behind their polymer‐based counterparts, which can be attributed to difficulties achieving favorable morphology. Herein, two asymmetric porphyrin‐based donors named DAPor‐DPP and DDPor‐DPP were synthesized, presenting stronger intermolecular interaction closer molecular stacking compared symmetric ZnP‐TEH. The DAPor‐DPP:6TIC blend afforded a morphology with nanoscale phase separation more ordered packing, thus efficient charge transportation suppressed recombination. Consequently, DAPor‐DPP:6TIC‐based device exhibited superior parameters, yielding champion PCE 16.62% higher than that DDPor‐DPP‐based (14.96%). To our knowledge, ranked as one highest values among binary OSC filed. This work provides prospective approach address challenge improving film further high efficiency via side‐chain strategy, exhibiting great potential constructing OSCs.

Language: Английский

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Efficient and Stable Z907-Based Dye-Sensitized Solar Cells Enabled by Suppressed Charge Recombination and Photocatalytic Activity

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(34), P. 13007 - 13016

Published: Aug. 14, 2024

Dye-sensitized solar cells (DSSCs) based on the TiO2 photoanode are promising contenders for photovoltaic technology. However, shows severe charge recombination and leads to rapid photodegradation of absorbed dyes due its photocatalytic activity. Herein, we developed a hybrid by embedding multifunctional fulleropyrrolidine (PCBO-3) into film. The film presents higher electron mobility, aligned energy level with dyes, reduced oxygen vacancy defects, synergistically contributing suppressed Moreover, dye molecules can form hydrogen bonds PCBO-3 molecules, thus enhancing loading photon harvesting. resulting DSSCs yield efficiencies 11.6% under standard one sun illumination 32.8% 1500 lx dim light, representing highest values Z907-based DSSCs. encapsulated devices show enhanced long-term operational stability, retaining 76.8% 89.3% initial PCE light 500 h, respectively. In contrast, only 48.9% 69.5% their original efficiency could be maintained control devices. Our results suggest that anode is facile approach revitalizing

Language: Английский

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Molecular Orientation Regulation of Hole Transport Semicrystalline‐Polymer Enables High‐Performance Carbon‐Electrode Perovskite Solar Cells

Small, Journal Year: 2024, Volume and Issue: 20(44)

Published: July 10, 2024

Carbon-based perovskite solar cells (PSCs) coupled with solution-processed hole transport layers (HTLs) have shown potential owing to their combination of low cost and high performance. However, the commonly used poly(3-hexylthiophene) (P3HT) semicrystalline-polymer HTL dominantly shows edge-on molecular orientation, in which alkyl side chains directly contact layer, resulting an electronically poor at perovskite/P3HT interface. The study adopts a synergetic strategy comprising additive solvent engineering transfer orientation P3HT into 3D orientation. target possesses improved charge as well enhanced moisture-repelling capability. Moreover, energy level alignment between layer is realized. As result, champion devices small (0.04 cm

Language: Английский

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Trialkylsilyl-thiophene-conjugated acceptor for efficient organic solar cells compatible with spin-coating and blade-coating technologies

Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(12), P. 4184 - 4193

Published: May 21, 2024

Language: Английский

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Gamma-Irradiated Chitosan@PVA@TiO2 Catalytic Counter Electrodes for Enhanced Dye-Sensitized Solar Cell (DSSC) Performance

Synthetic Metals, Journal Year: 2025, Volume and Issue: unknown, P. 117841 - 117841

Published: Jan. 1, 2025

Language: Английский

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