Science China Materials, Год журнала: 2024, Номер unknown
Опубликована: Дек. 18, 2024
Язык: Английский
Small, Год журнала: 2024, Номер unknown
Опубликована: Май 16, 2024
Abstract Developing a new end group for synthesizing asymmetric small molecule acceptors (SMAs) is crucial achieving high‐performance organic photovoltaics (OPVs). Herein, an acceptor, BTP‐BO‐4FO, featuring difluoro‐methoxylated end‐group reported. Compared to its symmetric counterpart L8‐BO, BTP‐BO‐4FO exhibits upshifted energy level, larger dipole moment, and more sequential crystallinity. By adopting two representative widely available solvent additives (1‐chloronaphthalene (CN) 1,8‐diiodooctane (DIO)), the device based on PM6:BTP‐BO‐4FO photovoltaic blend demonstrates power conversion efficiency (PCE) of 18.62% with excellent open‐circuit voltage ( V OC ) 0.933 V, which surpasses optimal result L8‐BO. The PCE realizes best efficiencies binary OPVs SMAs groups. A series investigations reveal that optimized film similar molecular packing motif fibrillar phase distribution as PM6:L8‐BO (DIO) does, resulting in comparable recombination dynamics, thus, fill factor. Besides, it found possesses efficient charge generation, yields better – J SC balance. This study provides ending enables cutting‐edge SMA‐based OPVs, enriching material library shed light further design ideas.
Язык: Английский
Процитировано
10
National Science Review, Год журнала: 2024, Номер 11(12)
Опубликована: Ноя. 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.
Язык: Английский
Процитировано
10
Materials Science and Engineering R Reports, Год журнала: 2024, Номер 160, С. 100828 - 100828
Опубликована: Июль 21, 2024
Язык: Английский
Процитировано
7
Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 161037 - 161037
Опубликована: Фев. 1, 2025
Язык: Английский
Процитировано
1
Nano-Micro Letters, Год журнала: 2025, Номер 17(1)
Опубликована: Апрель 1, 2025
Sequential processing (SqP) of the active layer offers independent optimization donor and acceptor with more targeted solvent design, which is considered most promising strategy for achieving efficient organic solar cells (OSCs). In SqP method, favorable interpenetrating network seriously depends on fine control bottom swelling. However, choice solvent(s) both have been mostly based a trial-and-error manner. A single often cannot achieve sufficient yet not excessive swelling, has long difficulty in high OSCs. Herein, two new isomeric molecules are introduced to fine-tune nucleation crystallization dynamics that allows judicious over swelling layer. The strong non-covalent interaction between molecule materials provides an excellent driving force optimize swelling-process. Among them, dipole moment promotes earlier PM6 extended time during SqP, improving bulk morphology vertical phase segregation. As result, champion efficiencies 17.38% 20.00% (certified 19.70%) achieved PM6/PYF-T-o (all-polymer) PM6/BTP-eC9 devices casted by toluene solvent.
Язык: Английский
Процитировано
1
Sustainability, Год журнала: 2024, Номер 16(14), С. 6159 - 6159
Опубликована: Июль 18, 2024
Energy harvesting from cleaner sources and preserving the environment dangerous gasses are presently key priorities globally to maintain sustainable development. In this context, photovoltaic technology plays a vital role in generating energy ternary organic solar cells. Ternary cells display significant potential for achieving outstanding performance compared binary structures. Over past few years, endeavors develop novel materials have led consistent rise efficiency, surpassing 19% single-junction devices. our study, we simulated an inverted cell (TOSC) structure employing one-dimensional optical drift diffusion model using “Oghma-Nano 8.0.034” software by optimizing active blend thickness at 80 nm within of ITO/SnO2/PM6:D18:L8-BO/PEDOT:PSS/Ag. We different parameters such as EQE, Photo-CELIV, PCE, Jsc, Voc, FF with layer thicknesses ranging 50 200 discover behavior device terms efficiency parameters. Furthermore, attained PCE 20% Jsc 27.2 mA cm−2, Voc 0.89 V, 82.3%. This approach can potentially be valuable constructing highly effective TOSC laboratory.
Язык: Английский
Процитировано
3
Advanced Functional Materials, Год журнала: 2024, Номер unknown
Опубликована: Сен. 9, 2024
Abstract Pursuing power conversion efficiency (PCE) is the priority of developing organic solar cells (OSCs) based on low‐cost completely non‐fused ring acceptors. Herein, a donor/acceptor re‐intermixing strategy to enhance photon capturing process, previously established well‐stratified active layer morphology reported. By adding 20 wt% PTQ10 (polymer donor) into acceptor's precursor, device PCE increased 16.03% from 15.11% D18/A4T‐16 control system, which attributed additional charge generation interface and suppressed bimolecular recombination. On contrary, using equal ratio PM6 leads significant loss, indicating importance considering vertical distribution perspective thermodynamics. Moreover, cutting‐edge level 17.21% for acceptor systems realized by altering PBQx‐TF/TBT‐26 PTQ11, via identical processing strategy. This work thus presents attractive engineering cell performance, as well in‐depth understanding.
Язык: Английский
Процитировано
3
Materials Science and Engineering R Reports, Год журнала: 2024, Номер 163, С. 100916 - 100916
Опубликована: Дек. 16, 2024
Язык: Английский
Процитировано
3
Cell Reports Physical Science, Год журнала: 2025, Номер 6(1), С. 102390 - 102390
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
0
ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown
Опубликована: Фев. 26, 2025
The meticulous control of micromorphology in high power conversion efficiency (PCE) polymer solar cells (PSCs) typically relies on halogenated solvents, which pose serious threats to both environmental sustainability and human health. In this work, a green efficient method for fabricating PCE PSCs with halogen-free solvents is developed. By introducing volatile solid additives 1-bromo-2,6-dichlorobenzene (DIB) 1-bromo-2,3,5-trichlorobenzene (TIB) into toluene the aggregation behaviors PM6:L8-BO were meticulously regulated, forming distinct fibrous morphology; detail, vertical direction exhibited pattern acceptor enrichment at top donor bottom, leads enhanced exciton dissociation efficiency, improved charge transport performance, significantly reducing recombination, finally PCEs, as maximum PCEs 18.56 17.67%, respectively, are notably higher than those devices without additives. Furthermore, since can be completely removed from active layer, additive-treated exhibit superior morphology photovoltaic stability. This therefore, unveils straightforward environmentally friendly preparing PSCs, instrumental facilitating large-scale commercialization PSC technology.
Язык: Английский
Процитировано
0