Achieving 20.8% organic solar cells via additive-assisted layer-by-layer fabrication with bulk p-i-n structure and improved optical management

Joule, Journal Year: 2024, Volume and Issue: 8(11), P. 3153 - 3168

Published: Aug. 29, 2024

Language: Английский

---

Extending Exciton Diffusion Length via an Organic‐Metal Platinum Complex Additive for High‐Performance Thick‐Film Organic Solar Cells

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

Published: Jan. 6, 2025

The long exciton diffusion length (LD) plays an important role in promoting dissociation, suppressing charge recombination, and improving the transport process, thereby performance of organic solar cells (OSCs), especially thick-film OSCs. However, limited LD hinders further improvement device as film thickness increases. Here, organic-metal platinum complex, namely TTz-Pt, is synthesized served a solid additive into D18-Cl:L8-BO system. addition TTz-Pt enhanced crystallinity blends, reduced energy disorder, trap density, decreased non-radiative recombination binding energy, which conducive to prolonging TTz-Pt-treated film, facilitating dissociation process along with inhibiting recombination. Consequently, D18:L8-BO:IDIC (100 nm) exhibits champion power conversion efficiency (PCE) 20.12% (certified 19.54%), one highest PCEs reported for OSCs date. Remarkably, record-breaking PCE 18.84% yielded active layer 300 nm. Furthermore, superior universality This work provides simple universal approach extending by introducing complex achieve highly efficient

Language: Английский

---

Halogenation Engineering of Solid Additives Enables 19.39% Efficiency and Stable Binary Organic Solar Cells via Manipulating Molecular Stacking and Aggregation of Both Donor and Acceptor Components

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

Published: Oct. 3, 2024

Abstract By selectively interacting with acceptor components, various typed solid additives achieve boosted power conversion efficiency (PCE) in organic solar cells (OSCs). However, due to the efficient active layer being composed of donor and materials, it is difficult obtain desired morphology by manipulating component alone, limiting further improvement PCEs. Herein, two a same backbone thiophene‐benzene‐thiophene (halogen‐free D1‐H) but different halogen substituents (fluorinated D1‐F chlorinated D1‐Cl) are developed probe working mechanism halogenated variation OSCs. Unlike D1‐H continuous charge distributions, D1‐Cl show isolated positive distribution benzene‐core negative thiophene, offering stronger non‐covalent interactions both (PM6) (L8‐BO), especially D1‐Cl. Consequently, D1‐Cl‐treated obtains an optimized phase separation improved molecular packing, boosting PCE 18.59% device stability OSCs, 17.62% for D1‐H‐treated counterparts. Moreover, using D18:L8‐BO D18:BTP‐eC9 as layers, binary OSCs impressive PCEs 19.29% 19.39%, respectively. This work indicates that halogenation engineering can effectively regulate improving elucidates underlying mechanism.

Language: Английский

---

In-situ understanding on the formation of fibrillar morphology in green solvent processed all-polymer solar cells

National Science Review, Journal Year: 2024, Volume and Issue: 11(12)

Published: Nov. 4, 2024

ABSTRACT Solid additive engineering has been intensively explored on morphology tuning for highly efficient all-polymer solar cells (all-PSCs), a promising photovoltaic technology towards multi-scenario application. Although the nano-fibrillar network of active layer induced by treatment is confirmed as key factor power conversion efficiency (PCE) all-PSCs, its formation mechanism not clearly revealed, lack precise and convincing real-time observation crystallization phase separation during liquid-to-solid transition process spin-coating. Herein we report an in-situ grazing incidence wide-angle/small-angle X-ray scattering (GIWAXS/GISAXS) screening that reveals fact naphthalene derived solid additives can suppress aggregation polymer acceptor (PY-IT) at beginning stage spin coating, which provides sufficient time space donor (PM6) to form fibril structure. Moreover, guided this knowledge, ternary system proposed, achieves cutting-edge level PCEs both small-area (0.04 cm2) (also decent operational stability) large-area (1 devices.

Language: Английский

---

Multiscale computational analysis of the effect of end group modification on PM6:BTP-x OSCs performance

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(34), P. 13311 - 13324

Published: Jan. 1, 2024

Theoretical computational simulation are used to analyse the molecular stacking characteristics of PM6:BTP- x OSCs and role end group modifications.

Language: Английский

---

Enhancing charge carrier dynamics with an N-type polymer guest for printable ternary organic solar modules

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(2)

Published: Jan. 13, 2025

The ternary strategy offers a promising route to enhance the power conversion efficiencies (PCEs) of organic solar cells (OSCs). In this contribution, we focus on state-of-the-art binary system PM6:L8-BO and reveal how n-type polymer guest (PYIT) in PM6:L8-BO:PYIT enhances carrier dynamics, thereby improving both efficiency scalability for large-area printable OSC modules. These benefits are primarily attributed two key factors: (i) excellent miscibility PYIT with host materials, coupled chain-dominant structure high crystallinity nature polymer, which creates additional pathways transport charge transfer; (ii) incorporation PYIT, limits excessive aggregation L8-BO, improves molecular packing, reduces film defects, enhancing exciton dynamics. optimizations lead an increase PCEs from 17.58% 18.59% OSC, improvements across all photovoltaic parameters. More importantly, exhibits compatibility printing processes, as demonstrated by doctor blading module achieving 15.57% PCE over area 11.7 cm2. This work highlights potential methodology tuning physical properties OSCs while performance scalability.

Language: Английский

---

Enhanced moisture and thermal stability of transparent electrodes via crosslinking for large-area flexible organic photovoltaic modules

Energy & Environmental Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Crosslinking enhanced the thermal and moisture stability of AgNWs-em-PVA flexible transparent electrode, which enabled fabrication large-area (52.3 cm 2 ), organic photovoltaic modules with a power conversion efficiency 14.78%.

Language: Английский

---

Recent Advances in Probing Electron Delocalization in Conjugated Molecules by Attached Infrared Reporter Groups for Energy Conversion and Storage

ACS Applied Energy Materials, Journal Year: 2025, Volume and Issue: 8(4), P. 1942 - 1963

Published: Feb. 6, 2025

This review article reports an overview of the recent developments in field electron delocalization study organic conjugated molecules by utilizing vibration frequencies exhibited attached functional groups such as nitrile (−C≡N), alkyne (−C≡C−), or carbonyl (−C═O). A brief introduction to delocalization, methods for study, and their importance is given first, followed application infrared spectroscopy molecules. Details with various reporter have been explained respective subsections based on groups. All reported structured presented properties studied using group. Finally, outlook this recently promising, exciting, interesting probing provided.

Language: Английский

---

Conjugated π-Extension of Small Molecular Nonfullerene Acceptor for Efficient Ternary Organic Solar Cells with an Efficiency of 19.10%

Energy & Fuels, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 14, 2025

In this study, we have successfully incorporated a small molecular acceptor, Y-LC, with conjugated π-extension as secondary acceptor in the PM6:BTP-eC9-based organic photovoltaics. The performance of device was significantly promoted from 18.45% binary system PM6:BTP-eC9 to over 19% ternary minimal Y-LC loading. This enhancement can be attributed alloy-like structures acceptors and optimized active layer morphology, which leads improved hole electron mobilities, thereby suppressing charge recombination, finally resulting higher photocurrent solar cells. Furthermore, complementary absorption is observed PM6 BTP-eC9, broaden spectrum photoactive enable more photons sunlight absorbed. Additionally, facilitates efficient transfer donor by forming cascade energy levels between BTP-eC9. These advantages collectively contribute superior obtained work also highlights that adoption nonfullerene suitable π-extensions minor additive photovoltaics powerful approach for achieving state-of-the-art

Language: Английский

---

Highly Ordered Polymorphism of Small Molecule Acceptor Delivering Efficient and Stable Binary Organic Solar Cells

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: March 10, 2025

Advancements in narrow bandgap organic small molecule acceptors (SMAs) has promoted solar cell (OSC) efficiencies beyond 20%. Achieving this milestone necessitates precise control over the active layer morphology, particularly its crystallinity and phase distribution, to optimize light absorption, charge transport, suppress recombination. However, controlling SMA morphology remains a significant challenge due their strong aggregation tendency. Existing methods, including high-temperature annealing, introducing high boiling point additives, frequently yield disordered polymorphs with limited scalability. Here, we report novel approach of utilizing 4-bromochlorobenzene as volatile solid additive induce formation highly ordered polymorph BTP-eC9 through mild annealing at 60 °C. This marks first demonstration such an polymorph, exhibiting optical properties comparable ideal crystals, enhanced anisotropy, refractive index, extinction coefficients. The specific further enables well-organized PM6 donor arrangement, establishing optimal bicontinuous network morphology. Consequently, OSCs based on PM6:BTP-eC9 achieve power conversion efficiency 19.53%, which increases 20.32% addition antireflection layer. work provides scalable effective strategy for enhancing OSC performance highlights critical role polymorphism optimizing photovoltaic performance.

Language: Английский

---