Enhancing Molecular Stacking Through “Strengthened Aggregation in Pseudo‐Dry Film” Strategy by Bromothiazol Additive for Efficient Organic Solar Cells DOI
Qiang Zhang, Hongyan Gao, Lin Li

et al.

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

Published: Nov. 29, 2024

Abstract Regulating the morphology and molecular ordering of active layer is crucial for developing high‐performance organic solar cells (OSCs). However, enhancing stacking challenging as non‐fullerene acceptors (NFAs) are confined within polymer network owing to well donor/acceptor miscibility fast solvent evaporation. Herein, 2,5‐dibromothiazol (DBrTz) removable solid additive chosen optimize film‐forming kinetics aggregation PM6:L8‐BO blends. During film formation process, chloroform evaporates first, trapping DBrTz in (pseudo‐dry state). Thereafter, will gradually volatilize, persistently prompting L8‐BO stack aggregate orderly until volatilization completed. The behavior designated “enhanced pseudo‐dry film,” an occurrence hitherto unobserved other additives. This results more compact π – long‐range L8‐BO. Furthermore, facilitated increased face‐on orientations improved vertical component distributions. optimized facilitates charge generation, transport, extraction. Consequently, DBrTz‐processed OSCs achieved a power conversion efficiency (PCE) 19.4%. work elucidates principles additives offers valuable insights fostering development novel improve OSCs.

Language: Английский

Achieving 20.8% organic solar cells via additive-assisted layer-by-layer fabrication with bulk p-i-n structure and improved optical management DOI
Lei Zhu, Ming Zhang,

Guanqing Zhou

et al.

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

Published: Aug. 29, 2024

Language: Английский

Citations

115
Extending Exciton Diffusion Length via an Organic‐Metal Platinum Complex Additive for High‐Performance Thick‐Film Organic Solar Cells DOI Open Access

Wentao Zou,

Yanna Sun, Lei Sun

et al.

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

Citations

2
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 DOI

Wenyan Su,

Xuming Zhou,

Qiang Wu

et al.

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

Citations

10
In-situ understanding on the formation of fibrillar morphology in green solvent processed all-polymer solar cells DOI Creative Commons
Ruijie Ma, Hongxiang Li, Top Archie Dela Peña

et al.

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

Citations

9
Multiscale computational analysis of the effect of end group modification on PM6:BTP-x OSCs performance DOI

Qingxing Wu,

Chongchen Xiang,

Guangjun Zhang

et al.

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

Citations

7
Unravel the Distinctive Roles of Liquid and Solid Additives in Blade‐Coated Active Layer for Organic Solar Cell Modules DOI

Adiljan Wupur,

Yaokai Li,

Yongmin Luo

et al.

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

Published: Sept. 24, 2024

Abstract Although encouraging progress in spin‐coated small‐area organic solar cells (OSCs), reducing efficiency loss caused by differences film uniformity and morphology when up‐scaled to large‐area modules through meniscus‐guided coating is an important but unsolved issue. In this work, in‐depth research conducted on the influence of both liquid solid additives active layer blade‐coated PM6:L8‐BO binary system. The study reveals that high boiling point like 1,8‐diiodooctane (DIO) used blade‐coating not only delay volatilization solvent also trigger Marangoni flow same direction as capillary flow, causing excessive aggregation acceptors, therefore destroying device performance. On contrary, additive 2‐Iododiphenyl ether (IDPE), which first reported can preserve mechanism for improving performance while effectively suppressing acceptors during film‐forming process from halogen‐free toluene, resulting highly homogeneous films. Consequently, with impressive 15.34% a total module area 18.90 cm 2 via based are achieved. This provides deep understanding effect perspective fluid mechanisms gives pathway development green printed high‐efficiency OSCs.

Language: Английский

Citations

3
Solid additive for manipulating the lamellar-stacking phases of donor and π-stacking phases of acceptor and its recycling implementation in organic solar cells DOI
Yeo Hyung Kim, Seoyoung Kim, Seunglok Lee

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158329 - 158329

Published: Dec. 1, 2024

Language: Английский

Citations

3
1,4-Dimethoxynaphthalene as a Solid Additive for Improved Photovoltaic Performance in Organic Solar Cells DOI
Yuanyuan Liu, Shiqi Ye, Huiqiu Deng

et al.

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

Published: Jan. 10, 2025

Morphology optimization of blend films is an essential strategy to enhance the photovoltaic performance organic solar cells (OSCs). Additive engineering effective for fine-tuning active layer morphology. Given limited efforts and achievements in designing synthesizing liquid additives, new solid additives manipulate morphology layers have gained widespread attention. Herein, 1,4-dimethoxynaphthalene (DMNA), with merits simple structure, low cost, ecofriendliness, successfully incorporated as a novel additive optimize OSCs based on D18-Cl:N3. The relationship between different DMNA contents device has been investigated. It found that can be effectively regulated by DMNA, leading enhanced molecular packing films, which favors exciton dissociation, charge transfer, suppression recombination. As result, 18.61% power conversion efficiency (PCE) obtained D18-Cl:N3 binary devices better than 17.21% PCE control device. This primarily due simultaneous increase short-circuit current density fill factor. Furthermore, general applicability confirmed other systems. These results suggest presents potential prospects regulating bulk heterojunction toward high-performance high-stability OSCs.

Language: Английский

Citations

0
Enhancing charge carrier dynamics with an N-type polymer guest for printable ternary organic solar modules DOI
Chujun Zhang, Dian Zhang,

Er-ming Feng

et al.

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

Citations

0
Enhanced moisture and thermal stability of transparent electrodes via crosslinking for large-area flexible organic photovoltaic modules DOI
Xin Lü, Yang Liu,

Ruiyu Tian

et al.

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

Citations

0