Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159673 - 159673
Published: Jan. 1, 2025
Language: Английский
Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 4, 2025
Abstract Ternary organic solar cells (T‐OSCs) based on energy transfer can significantly boost the light absorption efficiency, thereby improving their power conversion efficiency (PCE). However, uncontrolled distribution of third component in bulk heterojunction (BHJ) device often results low ( E FRET ), and also tends to compromise interpenetrating network structure active layer. Herein, a localized deposition strategy is proposed establish with controlled (CDBHJ). Take PM6:Y6:IBC‐F for example, IBC‐F serves as donor PM6 acceptor. Compared BHJ‐based devices, proportion within phase increases from 25.1% 72.7%, enhancing 46.5% 66.8% CDBHJ‐based devices. Furthermore, improves crystallization separation kinetics during film‐forming process. Thus, exhibits superior exciton generation, diffusion, dissociation process, along higher more balanced charge transport. Consequently, achieves PCE 18.29%, which ranks among best PM6:Y6‐based T‐OSCs. This work demonstrates effectiveness controlling component, presenting an innovative pathway development highly efficient
Language: Английский
Citations
4
Science, Journal Year: 2025, Volume and Issue: 387(6732), P. 381 - 387
Published: Jan. 23, 2025
Emerging wearable devices would benefit from integrating ductile photovoltaic light-harvesting power sources. In this work, we report a small-molecule acceptor (SMA), also known as non–fullerene (NFA), designed for stretchable organic solar cell ( s -OSC) blends with large mechanical compliance and performance. Blends of the organosilane-functionalized SMA BTP-Si4 polymer donor PNTB6-Cl achieved conversion efficiency (PCE) >16% ultimate strain (ε u ) >95%. Typical SMAs suppress OSC blend ductility, but addition enhances it. Although is less crystalline than other SMAs, it retains considerable electron mobility highly miscible essential enhancing ε . Thus, -OSCs PCE > 14% operating normally under various deformations (>80% retention an 80% strain) were demonstrated. Analysis several SMA-polymer revealed general molecular structure–miscibility–stretchability relationships designing blends.
Language: Английский
Citations
2
International Journal of Hydrogen Energy, Journal Year: 2025, Volume and Issue: 105, P. 234 - 247
Published: Jan. 23, 2025
Language: Английский
Citations
2
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 28, 2025
Abstract Simultaneously mitigating both photovoltage and photocurrent losses is crucial for organic solar cells (OSCs) to approach the Shockley–Queisser limit of ideal efficiency. Incorporating a narrower bandgap nonfullerene acceptor (NFA) as guest component into host donor:NFA system broadens absorption spectrum. However, this can also increase nonradiative decay rate according energy‐gap law. In work, ternary OSCs are constructed by combining narrow AQx‐2F (as NFA) with lower eC9 NFA), significantly enhancing generation without compromising photovoltage. The addition acts crystallization inducer, extending period increasing ordered packing distance. This leads suppressed trap states, elevated dielectric constant, prolonged exciton lifetime, balanced hole/electron transport, reduced recombination loss. Consequently, optimized D18:AQx‐2F:eC9 achieve champion power conversion efficiency (PCE) 20.6% high open‐circuit voltage 0.937 V, short‐circuit current density 27.2 mA cm −2 fill factor 80.8%, validated an independently certified PCE 20.0%, establishing new benchmark bulk heterojunction OSCs. work demonstrates effective method simultaneously mitigate losses, paving way high‐performance
Language: Английский
Citations
2
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 16, 2025
Abstract Pseudo‐planar heterojunction (PPHJ) structure using sequential deposition is an effective method for achieving high‐efficiency organic photovoltaics (OPVs). The crystallization and phase separation behavior during film‐forming process intricately related to morphology with PPHJ structure. Despite this, the relationship between these two factors remains ambiguous, thereby impeding further improvements in performance. To tackle this challenge, PM6 PY‐DT all‐polymer systems as models are utilized, combine theoretical calculations, situ spectroscopy, morphological characterization elucidate aforementioned relationship. Thermodynamically, can effectively suppress van der Waals forces, increase crystallinity of PM6, promote matching crystallinity. Kinetically, rate notably faster more sustained, facilitating development interpenetrating network enhanced Furthermore, driven by crystallization‐induced‐phase separation, characterized minimal intermixed content substantial domain size. Concurrently, layer swells a limited extent, downward diffusion PY‐DT, which promotes formation vertical Ultimately, favorable achieved optimizing process, resulting power conversion efficiency (PCE) 18.08%, highest PCEs reported binary OPVs based on date.
Language: Английский
Citations
2
Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 2, 2024
Constructing fibril morphology has been believed to be an effective method of achieving efficient exciton dissociation and charge transport in organic solar cells (OSCs). Despite emerging endeavors on the fibrillization semiconductors via chemical structural design or physical manipulation, tuning geometry, i.e., width length, for tailored optoelectronic properties remains studied depth. In this work, a series alkoxythiophene additives featuring varied alkyl side chains connected thiophene are designed modulate growth aggregates cutting-edge polymer donors PM6 D18. Molecular dynamics simulations morphological characterizations reveal that these preferentially locate near entangle with donors, which enhance conjugated backbone stacking form nanofibrils expanding from 12.6 21.8 nm length increasing 98.3 232.7 nm. This nanofibril structure is feasible acquire simultaneously. By integrating L8-BO as donor acceptor layers pseudo-bulk heterojunction (p-BHJ) OSCs layer-by-layer deposition, improvement power conversion efficiency (PCE) 18.7% 19.8% observed, contributed by enhanced light absorption, transport, reduced recombination. The versatility also verified D18:L8-BO OSCs, PCE 19.3% 20.1%, among highest values reported OSCs.
Language: Английский
Citations
12
Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 3, 2025
Abstract Introduction of a guest component into the active layer is simple yet effective approach to enhance performance organic solar cells (OSCs). Despite various components successfully employed in OSCs, efficient require deliberate design and ingenious inspiration, which still remains big challenge for developing high OSCs. In this work, we propose concept “structural gene” engineering create new “double‐gene” small molecule (L‐DBDD) by simply combining structures both donor PM6 acceptor L8‐BO. L‐DBDD inherit features acceptor, naturally acts as bridge between donor/acceptor (D/A) interfaces strengthen D/A interactions compatibility. Incorporation can facilitate rapid charge dissociation simultaneously optimize molecular packing transport. Consequently, ternary OSC based on : L8‐BO blend achieves top power conversion efficiency (PCE) 19.51 %, significantly suppressing binary control device (PCE=18.52 %). These results demonstrate that combination provides meaningful guideline component‐assisted highly
Language: Английский
Citations
1
Sustainability, Journal Year: 2025, Volume and Issue: 17(2), P. 512 - 512
Published: Jan. 10, 2025
Organic solar cells (OSCs) are made from carbon-rich organic compounds with low environmental impacts, unlike the silicon in traditional panels. Some of these materials can be broken down and reprocessed, enabling recovery valuable components. Specifically, active-layer that make up OSCs designed sustainability mind. However, it is important to note practical active used for commercialization still an area research development due their efficiency/stability processability. Herein, we synthesized three A-D-A’-D-A-type long-conjugated non-fullerene acceptors (NFAs) by incorporating various electron-withdrawing groups into benzothiadiazole-diindacenodithiophene core. These NFAs, changing end-capping groups, exhibit not only distinct physical, optical, electrochemical properties, but also differences crystallinity exciton dissociation. As a result, they exhibited significant photovoltaic performance PM6 donor-based binary devices. The introduction small amounts NFAs as third component PM6:BTP-eC9 blend significantly enhanced its photon harvesting capabilities influenced charge transfer dynamics. Finally, achieved remarkable power conversion efficiency nearly 17% utilizing eco-friendly solvent. This study provides insights efficient OSCs.
Language: Английский
Citations
1
ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 15, 2025
Conjugated polymer donors have always been one of the important components organic solar cells (OSCs), particularly those featuring simple synthetic routes, proper energy levels, and appropriate aggregation behavior. In this work, we employed a nonfused electron-deficient building block, dicyanobithiophene (2CT), for constructing high-performance donors. Combining with side-chain engineering, two novel halogen-free donors, PB2CT-BO PB2CT-HD, were reported. shorter alkyl chains on thiophene π bridges exhibited enhanced packing ordering improved crystallinity. When paired BTP-CN-HD as electron acceptor, PB2CT-BO-based OSC attained an impressive power conversion efficiency (PCE) 14.2% within bulk-heterojunction (BHJ) configuration. Additionally, active layers refined through layer-by-layer (LbL) approach, leading to more organized molecular fibrillar network. Consequently, employing processed LbL approach achieved notable PCE 15.3%. This enhancement is credited reduced loss (Eloss) 0.514 eV formation favorable morphology. study highlights considerable promise 2CT unit in progression high-efficiency Eloss.
Language: Английский
Citations
1
ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 15, 2025
High-energy photons arising from the UV component of solar spectrum are considered as a primary cause photoinduced degradation observed in organic cells (OSCs). We herein demonstrate scheme harvesting these high-energy via down-conversion (UVDC) layer embedded thin polymeric substrates an effective strategy for simultaneously enhancing efficiency and improving photostability OSCs. Transparent UV-curable photopolymer resin (NOA 61, Norland, Inc.) is employed to prepare polymer substrate sandwich UVDC comprised Ir(dmppy-ph)2tmd─a highly efficient yellow phosphorescent emitter, which exhibits high degree spectral overlap between its emission spectra absorption PM6, donor used photoactive blend along with non-fullerene acceptor Y7. The PM6:Y7 bulk heterojunction OSCs fabricated on found show nearly 7.2% higher power conversion (PCE). study reveals that improvement performance essentially due ability absorb some make them available by down-converting visible region optical scattering effect leads longer path length within active layer. A done monitoring PV function exposure time indicates that, proposed approach, it possible achieve 3-fold enhancement T97, or takes PCE become 97% initial value, alleviating UV-induced photochemical degradation. Statistical analysis also performed wide range sample distributions, verifying reliability repeatability results.
Language: Английский
Citations
1