Hyperbranched Perylene Diimide Polymers as Electron Transport Layers for Efficient Organic Solar Cells

Macromolecules, Год журнала: 2023, Номер 56(22), С. 9097 - 9106

Опубликована: Ноя. 13, 2023

The electron transport layer (ETL) plays a crucial role in achieving high performance and stability of organic solar cells (OSCs). ETL materials suffering from low conductivity can impede charge collection transport. Hyperbranched polymers display advantages excellent film-forming property facile preparation, which, however, often show conductivity. In this work, we designed two hyperbranched polymers, HPDIN-B01 HPDIN-B02, integrating the PDIN segments using tribromomethylbenzene cores through green environmentally-friendly quaternization polymerization reaction. Both possess outstanding alcohol solubility suitable energy levels. Notably, HPDIN-B02 bearing three ethyl units on benzene core exhibits strong self-doping behavior as confirmed by spin resonance measurements, which is favorable for extraction As result, when ETL, PM6:L8-BO-based OSCs delivered power conversion efficiency (PCE) 18.62%, more insensitive to thickness film compared that HPDIN-B01. More importantly, HPDIN-B02-based devices also remarkable durability under various conditions such stored glovebox, thermal treatment, or light illumination. This study demonstrates great potential perylene diimide-based polymer an efficient high-performing stable OSCs.

Язык: Английский

---

Efficient and stable organic solar cells enabled by incorporation of titanium dioxide doped PEDOT:PSS as hole transport layer

Progress in Organic Coatings, Год журнала: 2023, Номер 183, С. 107819 - 107819

Опубликована: Июль 22, 2023

Язык: Английский

---

Nickel(II) Nitrate Hole‐Transporting Layers for Single‐Junction Bulk Heterojunction Organic Solar Cells with a Record 19.02 % Efficiency

Angewandte Chemie, Год журнала: 2023, Номер 135(21)

Опубликована: Март 17, 2023

Abstract A facile strategy was developed here to improve the film quality of nickel‐based hole transporting layer (HTL) for efficient organic solar cell (OSC) applications. To prevent agglomeration Ni(NO 3 ) 2 during deposition, acetylacetonate added into precursor solution, which led formation an amorphous and glass‐like state. After thermal annealing (TA) treatment, film‐forming ability could be further improved. The additional UV‐ozone (UVO) treatment continuously improved increased work function conductivity such HTL. resulting TA & UVO modified Hacac HTL produced highly cells with exciting power conversion efficiencies 18.42 % 19.02 PM6 : BTP‐eC9 D18 BTP‐Th devices, respectively, much higher than control PEDOT PSS devices.

Язык: Английский

---

Simple and Low‐Cost Vanadyl Oxalate as Hole Transporting Layer Enables Efficient Organic Solar Cells

Advanced Functional Materials, Год журнала: 2023, Номер 34(1)

Опубликована: Сен. 22, 2023

Abstract Organic solar cells (OSCs) with the conventional configuration usually use polyethylenedioxythiophene:polystyrene sulfonate (PEDOT:PSS) as hole‐transporting layer (HTL); however, its acidity tends to affect performance and long‐term stability of devices. Therefore, replacing PEDOT:PSS other more stable HTLs is essential for realizing practical applications OSCs. To achieve this goal, a simple low‐cost vanadyl oxalate (VOC 2 O 4 ) identified HTL facilitate high power conversion efficiencies (PCEs), good stability, thickness tolerance be achieved in The VOC thin film can easily prepared by spin‐coating from aqueous solution onto ITO/glass substrate thermally annealed at 100 °C exhibit transmittance, conductivity, work function. It applied robust wide processing conditions, especially after being heated 200 treated UV‐ozone (UVO) afford very PCE 18.94% This value among highest PCEs obtained binary In addition, derived OSCs better than those based on HTL. These results reveal that an excellent OSCs, having great potential large‐area device applications.

Язык: Английский

---

Solution-Processed Co₃O₄-Based Hole Transport Layer for Nonfullerene Organic Solar Cells

ACS Applied Electronic Materials, Год журнала: 2024, Номер 6(2), С. 806 - 815

Опубликована: Янв. 22, 2024

The imperative for achieving commercial success in organic solar cells (OSCs) lies their efficient and stable operation within open-air environments, which enables large-scale production while concurrently reducing manufacturing costs. Poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) is usually used as a hole transporting material the conventional configuration of OSCs; however, observations reveal inferior stability due to its acidic hygroscopic tendency. Therefore, introducing transport layer (HTL) replacing PEDOT:PSS essential OSCs. This work highlights both these issues; simple low-cost solution-processed Co3O4 HTL was developed nonfullerene-based OSCs conditions. cobalt(II) acetate tetrahydrate (CATH) adipic acid precursors were synthesize under ambient conditions through one-shot mixing. To control electronic properties thin film, thermal annealing (TA) UV–ozone (UVO) post-treatment employed. with afford an excellent power conversion efficiency 14.13% PM6:Y6 absorber layer, much higher than that (12.62%) CATH (13.01%) counterpart. Interestingly, derived HTL-based OSC exhibited continuous illumination AM1.5G lights In conclusion, this emphasizes pivotal role Co3O4-based HTLs advancing nonfullerene OSCs, contributing advancement toward sustainable photovoltaic technologies.

Язык: Английский

---

Current Progress of Efficient Active Layers for Organic, Chalcogenide and Perovskite-Based Solar Cells: A Perspective

Energies, Год журнала: 2023, Номер 16(16), С. 5868 - 5868

Опубликована: Авг. 8, 2023

Photovoltaics has become one of the emerging alternatives to progressively supply/replace conventional energy sources, considering potential exploitation solar energy. Depending on nature light harvester influence its light-absorption capability and facility produce electricity, different generations devices have been fabricated. Early studies organic molecules (dye sensitizers) with good absorption coefficients, going through metal chalcogenides and, lastly, timely emergence halide perovskites, promoted development novel low-cost cells promising photoconversion efficiency (PCE), close well-established Si-based devices. However, main drawbacks such as degradation/photocorrosion active layer, existence intrinsic defect sites, inherent toxicity material due presence some harmful elements blocked future commercialization above kind cells. In this review, we highlight current progress in achieving efficient photomaterials for organic, perovskites-based purpose high PCE values, which are breakthroughs research topic, diverse approaches used extend stability layer improve performance

Язык: Английский

---

An Alcohol-Soluble Cathode Interface Material with Low-Temperature Processing and Thickness Insensitivity for Efficient and Highly Stable Flexible Organic Solar Cells

ACS Sustainable Chemistry & Engineering, Год журнала: 2025, Номер unknown

Опубликована: Фев. 14, 2025

Язык: Английский

---

Solvent‐Induced Copper Vacancy in CuSCN Layer: A Strategy to Boost Conductivity and Optimize Energy Levels for Efficient Organic Solar Cells

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 9, 2024

Abstract Copper(I) thiocyanate (CuSCN) is a prominent wide‐bandgap p‐type semiconductor with desirable transparency and chemical robustness. Whereas intrinsic limitations, such as its relatively low Fermi level ( E F ) modest electrical conductivity, have impeded broader application in organic solar cells (OSCs). This study introduces novel approach to modify the electronic properties of CuSCN by inducing copper vacancies through use specific solvent mixtures, thereby enhancing suitability for OSCs. The effects two methanol/ammonia (CH 3 OH/NH 4 OH) dimethyl sulfoxide/ N , ‐Dimethylformamide (DMSO/DMF) systematically investigated, on layer. findings reveal that these systems induce higher concentration within film, resulting significant reduction substantial increase conductivity. These modifications led improved energy alignment PM6:L8‐BO:BTP‐eC9 blended photoactive layers, culminating marked enhancement power‐conversion efficiencies 19.10% DMSO/DMF processed Additionally, it has observed enhanced shelf/thermal stability thickness tolerance OSCs based films. work not only presents strategy modifying performance characteristics but also underscores potential contribute advancement photovoltaic technologies.

Язык: Английский

---

Solution‐Processed Thickness‐Insensitive Molybdenum Oxide Hole‐Transporting Layer Regulated by Reductive Ionic Liquid for Stable and Efficient Organic Solar Cells

Small, Год журнала: 2024, Номер 21(5)

Опубликована: Дек. 29, 2024

Abstract Developing solution‐processed, thickness‐insensitive hole‐transporting layers (HTLs) is a key challenge in scaling high‐performance organic solar cells (OSCs). Here, simple and efficient method presented to produce highly conductive molybdenum oxide (MoO x ) HTLs by n‐doping ammonium heptamolybdate with reductive ionic liquid (IL). Owing the effect inherent conductivity of IL, 5% IL:MoO significantly increased 8.06 × 10 −3 S m −1 , surpassing traditional solution‐processed MoO HTLs. Moreover, IL's multifunctional non‐covalent adsorption sites high boiling point help reduce electronic disorder passivate parasitic traps, enhancing overall performance. As result, shows excellent versatility commonly used photoactive systems achieves remarkable PCE 19.55% D18:N3:L8‐BO ternary system. This outperforms neat PEDOT:PSS devices represents as highest reported value among single‐junction OSCs Additionally, also exhibit superior stability compared devices. Furthermore, impressive thickness insensitivity, maintaining 83.3% optimum even at 150 nm. The exceptional PCE, versatility, stability, insensitivity HTL collectively highlight its potential substitute for OSC production.

Язык: Английский

---

The Influence of Donor/Acceptor Interfaces on Organic Solar Cells Efficiency and Stability Revealed through Theoretical Calculations and Morphology Characterizations

Angewandte Chemie, Год журнала: 2024, Номер 136(10)

Опубликована: Янв. 8, 2024

Abstract End‐groups halogenation strategies, generally refers to fluorination and chlorination, have been confirmed as simple efficient methods regulate the photoelectric performance of non‐fullerene acceptors (NFAs), but a controversy over which one is better has existed for long time. Here, two novel NFAs, C9N3‐4F C9N3‐4Cl, featured with different end‐groups were successfully synthesized blended renowned donors, D18 PM6, electron‐withdrawing units. Detailed theoretical calculations morphology characterizations interface structures indicate NFAs based on possess binding energy miscibility shows an obvious influence phase‐separation morphology, charge transport behavior device performance. After verified by other three pairs reported universal conclusion obtained devices fluorination‐end‐groups‐based PM6 chlorination‐end‐groups‐based show excellent efficiencies, high fill factors stability. Finally, D18: PM6: C9N3‐4Cl yield outstanding efficiency 18.53 % 18.00 %, respectively. Suitably selecting donor regulating donor/acceptor can accurately present conversion ability points out way further molecular design selection high‐performance stable organic solar cells.

Язык: Английский

---