An Efficient and Stable Inverted Structure Organic Solar Cell Using ZnO Modified by 2D ZrSe₂ as a Composite Electron Transport Layer

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(37)

Published: April 10, 2024

Abstract As an electron transport layer (ETL) widely used in organic solar cells (OSCs), ZnO has problems with energy level mismatch the active and excessive defects on surface, which can reduce efficiency of OSCs. Here, ZnO/ZrSe 2 composite is fabricated by modifying 2D ZrSe . The XPS first‐principles calculation (FPC) show that obtains electrons from forms interfacial dipoles toward layer, decreases work function ZnO, thus reducing interface barrier favoring collection At same time, after modification, oxygen vacancy density surface decreases, improving conductivity ZnO. More importantly, femtosecond transient absorption (Fs‐TA) shows selectively traps holes prevents entering thereby probability recombination. Finally, as a novel ETL OSCs PBDB‐T: ITIC, PM6:Y6 PM6: L8‐BO layers, obtaining 12.09%, 16.34%, 18.24% efficiency, respectively. This study provides method for modification further investigates role nanosheets modification.

Language: Английский

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Progress of organic photovoltaics towards 20% efficiency

Nature Reviews Electrical Engineering, Journal Year: 2024, Volume and Issue: 1(9), P. 581 - 596

Published: Aug. 21, 2024

Language: Английский

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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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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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Double Hole Transport Layers Enable 20.42% Efficiency Organic Solar Cells by Aggregation Control of Self‐Assembled Molecules on Cobalt Salt Surfaces

Small, Journal Year: 2025, Volume and Issue: unknown

Published: March 26, 2025

Heterojunction interfaces play a crucial role in charge carrier transport, influencing the overall photovoltaic performance of organic solar cells (OSCs). Despite importance, advancements interfacial engineering, especially optimizing microstructure and nanomorphology, have not kept pace with research on photoactive layers. In study, strategy is explored to control self-assembly growth alcohol-soluble Me-4PACz (4P) used as hole transport layer (HTL) OSCs. The surface architecture modified inorganic Co salts via Cu doping UV-ozone treatments, creating smooth top an increased Co3+/Co2+ ratio hydroxyl groups. This meticulous design fine-tuned assembly behavior self-assembled molecules, resulting transition from spherical aggregates more uniform worm-like morphology. Additionally, electrical optical properties are optimized passivate defects enhance wettability solvents, leading improved extraction reduced recombination losses. Consequently, OSC Cu-Co/4P HTL exhibited highest power conversion efficiency 20.42% (certified 20.20%). characteristic universality stability make potential candidate for widespread applications, particularly providing rationalized guidance further

Language: Английский

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In Situ Electrochemical Cobalt Doping in Perovskite-Structured Lanthanum Nickelate Thin Film Toward Energy Conversion Enhancement of Polymer Solar Cells

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(25), P. 32857 - 32873

Published: June 12, 2024

This study demonstrates that the electrochemical doping of lanthanum nickelate (LNO) with cobalt ions is a promising strategy for enhancing its physical and properties, which are critical energy storage conversion devices. LNO emerges as hole transport layer (HTL) in solar cells due to stability, large band gap, high transparency. Nevertheless, low conductivity improperly aligned positions persistent problems. Here, pioneering endeavor, Co-doped thin films were synthesized electrochemically applied HTL polymer (PSCs). Characterization revealed impact Co on electrochemical, structural, morphological, optical properties films. Depending level, PSCs based 10 mol % outperformed pure LNO, achieving champion efficiency 6.11% enhanced short-circuit current density (12.84 mA cm–2), fill factor (68%), open-circuit voltage (0.70 V), external quantum (82.6%). enhancement resulted from decreased series resistance, refined surface morphology, minimized trap-assisted recombination, conductivity, increased charge carrier production, favorable level alignment, improved extraction facilitated by LNC0.10O HTL. Moreover, unencapsulated PSC-LNC0.10O long-term stability notably retained 86% initial PCE after 450 h ambient air, 82% being continuously heated 85 °C 300 h, 80% operating at maximum power point h. These findings offer straightforward approach PSC performance through supported functional theory (DFT) calculations validate experimental results confirm improvement an

Language: Английский

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Advancing High‐Performance Organic Solar Cells with Carbazole‐Modified 2PACz for Scalable Large‐Area Fabrication

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

Published: Feb. 2, 2025

Abstract The self‐assembling molecule 2PACz tends to aggregate in thin films, which negatively impacts the performance of organic solar cells (OSCs) when used as a hole‐transporting layer (HTL), particularly large‐area devices. To overcome this, binary conjugated molecular system incorporating carbazole (Cz), shares similar backbone with 2PACz, is introduced. Despite strong aggregation tendencies and Cz individually, their blend forms homogeneous films due hydrogen bonding interactions between two molecules. These suppress aggregation, resulting smooth well‐ordered films. Devices modified HTL show significantly enhanced charge transfer, achieving power conversion efficiency (PCE) 20.10%, fill factor 80.3%, short‐circuit current 28.98 mA cm − 2 , outperforming those unmodified 2PACz. Large‐area devices (1.0 ) achieve record‐high PCE 18.56% retention rate 92.7%, compared 43% for findings highlight potential carbazole‐modified improve both stability OSCs, offering promising strategy high‐performance development.

Language: Английский

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Balanced Miscibility and Crystallinity by 2D Acceptors Enabled Halogen‐Free Solvent‐Processed Organic Solar Cells to Achieve 19.28% Efficiency

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

Published: Nov. 19, 2024

Two highly crystalline 2D acceptors, ATIC-C11 and ATIC-BO, with acenaphthene-expanded quinoxaline central cores, have been demonstrated very different characteristics in ternary organic solar cells (OSCs). The difference side chains induces their distinctive molecular packing mode unique crystal structure, which displays a 3D structure an elliptical framework, ATIC-BO gives rectangular framework. Their high crystallinity contributes to organized devices, thus low energetic disorder suppressed energy loss. Through the analysis of morphology carrier kinetics, it is found that ATIC-BO's strong self-aggregation immiscibility induce large aggregates severely impede charge transfer (CT) dissociation. Conversely, ATIC-C11's suitable compatibility positively regulate kinetics during film formation, forming much-ordered favorable phase separation size blend films. As result, ATIC-C11-based devices achieve efficiency 19.28% potential scalability stability, top-ranking among nonhalogenated solvent-processed OSCs. This work not only efficient stable halogen-free photovoltaics (OPVs), but also offers new thought for material design selection rule on third component

Language: Английский

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Phosphates Modulated NiO_x HTL toward a Lower V_oc Loss in Wide Bandgap Perovskite Solar Cells

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

Published: Dec. 13, 2024

Abstract The combination of p‐type NiO x and self‐assembled monolayers (SAMs) has recently emerged as an optimal structure for hole transport layer (HTL) in wide‐bandgap perovskite solar cells (WBG PSCs). However, the unique requirements this cascade HTL system differ significantly from those neat . Specifically, tendency to agglomerate can lead poor film morphology inadequate interfacial contact with SAMs, resulting significant open‐circuit voltage ( V oc ) loss PSCs. Herein, these issues are addressed by incorporating sodium hexametaphosphate (SHMP) into ink. This approach enhances dispersibility nanoparticles, improving conductivity films through interactions between P = O P‐O groups Ni ions. Additionally, SHMP promotes better Me‐4PACz interface increasing number hydroxyl on uniform surface films. Consequently, a high power conversion efficiency (PCE) 21.02% is achieved WBG (1.79 eV) PSCs smallest relative 24.69%. encapsulated devices exhibit excellent stability under humidity elevated temperatures. Furthermore, when combined Sn‐Pb narrow‐bandgap perovskite, PCE 27.66% attained 2‐terminal tandem (TSCs).

Language: Английский

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Cost-Effective Cobalt(II) Acetate as an Efficient and Stable Hole Transport Layer in Inverted Organic Photodetectors

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

Published: Feb. 11, 2025

Language: Английский

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