Science China Chemistry, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 14, 2024
Язык: Английский
ACS Applied Polymer Materials, Год журнала: 2025, Номер unknown
Опубликована: Янв. 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.
Язык: Английский
Процитировано
2
Advanced Materials, Год журнала: 2024, Номер unknown
Опубликована: Дек. 5, 2024
Abstract Significant advancements in power conversion efficiency have been achieved organic solar cells with small molecule acceptors. However, stability remains a primary challenge, impeding their widespread adoption renewable energy applications. This review summarizes the degradation of different layers within device structure under varying conditions, including light, heat, moisture, and oxygen. For photoactive layers, chemical pathways polymer donors acceptors are examined detail, alongside morphological bulk heterojunction structure, which plays crucial role performance. The mechanisms commonly used anode cathode interlayers electrodes addressed, as these significantly influence overall stability. Mitigation methods for identified provided each section to offer practical insights improving longevity. Finally, an outlook presents remaining challenges achieving long‐term stability, emphasizing research directions that require further investigation enhance reliability performance real‐world
Язык: Английский
Процитировано
8
Advanced Energy Materials, Год журнала: 2025, Номер unknown
Опубликована: Март 5, 2025
Abstract Organic photovoltaics (OPV) are a promising solar cell technology well‐suited to mass production using roll‐to‐roll processes. The efficiency of lab‐scale cells has exceeded 20% and considerable attention is currently being given understanding minimizing the remaining loss mechanisms preventing higher efficiencies. While recent improvements partly owed reducing non‐radiative recombination losses at open circuit, low fill factor ( FF ) due significant transport resistance becoming Achilles heel OPV. term refers voltage light intensity‐dependent charge collection in low‐mobility materials. In this perspective, it demonstrated that even highest organic (OSCs) reported to‐date have performance can be attributed lead high losses. A closer look material properties influencing provided. How experimentally characterize quantify described by providing easy follow instructions. Furthermore, causes theory behind detailed. particular, relevant figures merit (FoMs) different viewpoints on integrated. Finally, we outline strategies followed minimize these future cells.
Язык: Английский
Процитировано
1
Advanced Functional Materials, Год журнала: 2025, Номер unknown
Опубликована: Апрель 7, 2025
Abstract Current state‐of‐the‐art organic photovoltaic (OPV) films, composed of conjugated polymer donors and small molecule acceptors, are often limited by the high brittleness their rigid backbones, which restricts application in wearable devices. In contrast, all‐polymer OPVs have demonstrated enhanced intrinsic stretchability, but further advancements necessary to meet demands. Here, an uncharted strategy is reported enhance mechanical stretchability performance incorporating a nearly‐amorphous polymer, poly(indacenodithiophene‐co‐benzothiadiazole) (IDTBT) into layer‐by‐layer structured active layer. IDTBT possesses fracture strain ≈80%, significantly outperforming well‐known donor polymers like PM6. The incorporation enhances properties, with both optimized at low contents. More importantly, intrinsically stretchable demonstrate superior stability impressive power conversion efficiency 14.2%, highest date this category. Particularly, IDTBT‐strengthened retain 72% initial under tensile 50%, 68% even after being stretched hundreds times 30% strain, demonstrating exceptional stability. This approach underscores potential semiconductors designing highly OPVs, paving way for seamless integration electronics.
Язык: Английский
Процитировано
1
Advanced Energy Materials, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 10, 2024
Abstract Flexible and stretchable organic solar cells (FOSCs SOSCs) hold immense potential due to their versatility applicability in emerging areas such as wearable electronics, foldable devices, biointegrated systems. Despite these promising applications, several challenges remain, primarily related the mechanical durability, material performance, scalability required for commercialization. This review comprehensively highlights recent advancements design fabrication of FOSCs SOSCs, with a particular emphasis on key functional layers, including transparent conductive electrodes, interfacial photoactive materials, top electrodes. Innovations design, active layers electrodes improved flexibility, are discussed alongside developments device processes achieve power conversion efficiencies exceeding 19%. Furthermore, addresses remaining challenges, need scalable manufacturing techniques enhanced robustness under strain. Finally, prospects SOSCs analyzed, providing insights into how technologies can contribute development sustainable, high‐performance sources electronic devices other flexible electronics. offers valuable insights, bringing commercialization wearable, closer reality.
Язык: Английский
Процитировано
6
Macromolecular Rapid Communications, Год журнала: 2024, Номер unknown
Опубликована: Сен. 3, 2024
Abstract The dimerization of small molecule acceptors (SMAs) holds significant potential by combining the advantages both SMAs and polymer in realizing high power conversion efficiency (PCE) operational stability organic solar cells (OSCs). However, advancements selection innovation dimeric linkers are still challenging enhancing their performance. In this study, three new acceptors, namely DY‐Ar‐4, DY‐Ar‐5, DY‐Ar‐6 synthesized, linking two Y‐series SMA subunits via an “end‐to‐end” strategy using flexible spacers (octyl, decyl, dodecyl, respectively). influence spacer lengths on device performance is systematically investigated. results indicate that DY‐Ar‐5 exhibits more compact ordered packing, leading to optimal morphology. OSCs based PM6: achieves a maximum PCE 15.76%, attributes enhance balance carrier mobility, reduce recombination. This suitable non‐conjugated units provides rational principle for designing high‐performance non‐fullerene acceptors.
Язык: Английский
Процитировано
4
Advanced Functional Materials, Год журнала: 2024, Номер unknown
Опубликована: Сен. 18, 2024
Abstract High efficiency, stability, and flexibility are key prerequisites for the commercial applications of organic solar cells (OSCs). Herein, three back‐to‐back connected dimers (2Qx‐TT, 2Qx‐C3, 2Qx‐C6) developed as guest acceptors OSCs with improved comprehensive performance. By regulating linkage from rigid bithiophene to flexible alkyl chain, display quite different molecular geometry intermolecular interactions, consequently influencing their packing arrangement, film‐forming process, carrier mobilities, device flexibility. introducing these dimer into active layer, form alloy phases host acceptor, promoting process charge dynamics. All ternary devices exhibit PCEs over 18% than control binary device. Among them, 2Qx‐C3‐based obtains best efficiency high 19.03%. Moreover, thanks stronger entanglement favored by linkage, PM6:BTP‐eC9:2Qx‐C3‐based shows outstanding stability The displays an PCE 16.09% a crack‐onset strain 15.0%, showing excellent mechanical robustness close all‐polymer devices. This work demonstrates potential highly efficient, stable OSCs.
Язык: Английский
Процитировано
4
Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160548 - 160548
Опубликована: Фев. 1, 2025
Язык: Английский
Процитировано
0
Nano Energy, Год журнала: 2025, Номер unknown, С. 111008 - 111008
Опубликована: Апрель 1, 2025
Язык: Английский
Процитировано
0
Macromolecular Rapid Communications, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 3, 2024
Abstract Branch‐connected dimerized acceptors can take full advantages of four end units in enhancing molecular packing comparing to that terminal‐connected ones, thus potentially reaching the best balance between stability and power conversion efficiency (PCE) organic solar cells (OSCs). Herein, two branch‐connected acceptors, namely D1 D2, are developed by employing bithiophene difluorinated as linker groups, respectively. Induced fluorine atoms on group, D2 affords a larger molar extinction coefficient, more importantly, optimized nanoscale film morphology superior charge transport behavior D1. Consequently, D2‐based binary OSCs render good PCE 16.66%, outperforming 15.08% for D1‐based ones. This work highlights great significance group screening designing high‐performance acceptors.
Язык: Английский
Процитировано
1