Recent advances in PM6:Y6-based organic solar cells

Materials Chemistry Frontiers, Год журнала: 2021, Номер 5(8), С. 3257 - 3280

Опубликована: Янв. 1, 2021

This review provides a detailed overview of PM6:Y6-based organic solar cells (OSCs), including the underlying mechanisms, terpolymers derived from PM6, ternary or quaternary OSCs, interfacial engineering and electrode progress.

Язык: Английский

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Precise synthesis and photovoltaic properties of giant molecule acceptors

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Дек. 2, 2023

Series of giant molecule acceptors DY, TY and QY with two, three four small acceptor subunits are synthesized by a stepwise synthetic method used for systematically investigating the influence subunit numbers on structure-property relationship from YDT to polymerized PY-IT. Among these acceptors-based devices, TY-based film shows proper donor/acceptor phase separation, higher charge transfer state yield longer lifetime. Combining highest electron mobility, more efficient exciton dissociation lower carrier recombination properties, device exhibits power conversion efficiency 16.32%. These results indicate that number in has significant their photovoltaic properties. This will be beneficial diversify structures promote applications high-efficiency stable organic solar cells.

Язык: Английский

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Approach toward Low Energy Loss in Symmetrical Nonfullerene Acceptor Molecules Inspired by Insertion of Different π-Spacers for Developing Efficient Organic Solar Cells

ACS Omega, Год журнала: 2023, Номер 8(46), С. 43792 - 43812

Опубликована: Ноя. 10, 2023

In this quantum approach, by adding bridge/π-spacer fragments between the donor and acceptor parts of a newly constructed DF-PCIC (A-D-A type) molecule, it is aim to improve photovoltaic characteristics organic solar cells (OSCs). After π-spacer insertion into reference molecule (DF-R), six new molecules (DF-M1 DF-M6) were designed. The optoelectronic attributes inspected theoretically calculated using MPW1PW91/6-31G(d,p) level theory. All proposed possessed lower band gap (Eg), higher value absorption, reorganization energy, greater dipole moment, energies excitations than DF-R molecule. frontier molecular orbital study proclaimed that DF-M1 has lowest 1.62 eV in comparison 2.41 DF-R. Absorption properties represented DF-M2 show highest absorption values up 1006 1004 nm, respectively, near-infrared region. Regarding λe (0.0683896 eV) λh (0.1566471 eV). DF-M5 manifested moments with 5.514665 7.143434 D, respectively. open circuit voltage (VOC) all acceptors was J61, complex. DF-M4 DF-M6 showed VOC fill factor Based on given results, supposed presented might prove themselves be better thus great interest experimentalists. Thus, they are suggested used develop proficient OSC devices improved prospects near future.

Язык: Английский

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3D Crystal Framework Regulation Enables Se‐Functionalized Small Molecule Acceptors Achieve Over 19% Efficiency

Advanced Energy Materials, Год журнала: 2024, Номер 14(19)

Опубликована: Март 10, 2024

Abstract Se‐functionalized small molecule acceptors (SMAs) exhibit unique advantages in constructing materials with near‐infrared absorption, but their photovoltaic performance lags behind that of S‐containing analogs organic solar cells (OSCs). Herein, two new Se‐containing SMAs, namely Se‐EH and Se‐EHp, are designed synthesized by regulating bifurcation site outer alkyl chain, which enables Se‐EHp to form different 3D crystal frameworks from CH1007. displays tighter π–π stacking denser packing framework smaller‐sized pore structure induced larger steric hindrance effect chain branched at 2‐position, a higher dielectric constant PM6:Se‐EH active layer can be obtained. OSCs based on achieved very high PCEs 18.58% binary 19.03% ternary devices FF approaching 80% for SMAs. A more significant adjusts the molecular crystallization favorable nanofiber interpenetrating network an appropriate domain size reduce rate sub‐ns recombination promote balanced transport carriers. This work provides references further design development highly efficient

Язык: Английский

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Random Polymerization Strategy Leads to a Family of Donor Polymers Enabling Well‐Controlled Morphology and Multiple Cases of High‐Performance Organic Solar Cells

Advanced Materials, Год журнала: 2020, Номер 32(52)

Опубликована: Ноя. 13, 2020

Abstract Developing high‐performance donor polymers is important for nonfullerene organic solar cells (NF‐OSCs), as state‐of‐the‐art acceptors can only perform well if they are coupled with a matching suitable energy levels. However, there very limited choices of NF‐OSCs, and the most commonly used ones named PM6 PM7, which suffer from several problems. First, performance these (particularly PM7) relies on precise control their molecular weights. Also, optimal morphology extremely sensitive to any structural modification. In this work, family developed based random polymerization strategy. These achieve well‐controlled variety chemical structures The polymer donors D–A1–D–A2‐type copolymers in D A1 units monomers originating or while A2 unit comprises an electron‐deficient core flanked by two thiophene rings branched alkyl chains. Consequently, multiple cases highly efficient NF‐OSCs achieved efficiencies between 16.0% 17.1%. As cores be changed many other units, strategy easily expand NF‐OSCs.

Язык: Английский

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Wide bandgap polymer donors for high efficiency non-fullerene acceptor based organic solar cells

Materials Advances, Год журнала: 2020, Номер 2(1), С. 115 - 145

Опубликована: Ноя. 13, 2020

Structural design and processing of wide bandgap (WBG) polymer donors for non-fullerene acceptors ITIC, IT-4F, Y6 to achieve ultrahigh efficiency are discussed.

Язык: Английский

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Recent progress in reducing voltage loss in organic photovoltaic cells

Materials Chemistry Frontiers, Год журнала: 2020, Номер 5(2), С. 709 - 722

Опубликована: Окт. 14, 2020

ESP modulation can be regarded as a potential molecular design strategy to improve efficiencies of OPVs by reducing voltage losses.

Язык: Английский

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Hammer throw-liked hybrid cyclic and alkyl chains: A new side chain engineering for over 18 % efficiency organic solar cells

Nano Energy, Год журнала: 2022, Номер 101, С. 107538 - 107538

Опубликована: Июнь 23, 2022

Язык: Английский

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Enhanced Charge Transport and Broad Absorption Enabling Record 18.13% Efficiency of PM6:Y6 Based Ternary Organic Photovoltaics with a High Fill Factor Over 80%

Advanced Functional Materials, Год журнала: 2021, Номер 32(13)

Опубликована: Дек. 14, 2021

Abstract Ternary architecture is an efficient strategy to boost desired power conversion efficiency of single‐junction organic solar cells (OSCs). Here, a ternary OSC by incorporating compatible acceptor ITIC‐M as third component into state‐of‐the‐art PM6:Y6 blend reported, yielding 18.13% and impressive fill factor 80.10%. The the highest record for based devices reported date. full advantages designed heterojunction are good complementary light absorption that increases photocurrent, matched interfacial electronic structures featuring so‐called pinning energies facilitate exciton separation suppress charge recombination loss. Furthermore, plays vital role in optimizing micromorphology with better dispersity, well‐formed fibrillar structure enhanced crystallinity, thus boosting transport device performance.

Язык: Английский

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Organic Photovoltaic Efficiency Predictor: Data-Driven Models for Non-Fullerene Acceptor Organic Solar Cells

The Journal of Physical Chemistry Letters, Год журнала: 2022, Номер 13(19), С. 4235 - 4243

Опубликована: Май 6, 2022

In the design of organic solar cells, there has been a need for materials with high power conversion efficiencies. Scharber's model is commonly used to predict efficiency; however, it exhibits poor performance new non-fullerene acceptor (NFA) devices, since was designed fullerene-based devices. this work, an empirical proposed that can be more accurate alternative NFA cells. Additionally, many screening studies use computationally expensive methods. A based on using semiempirical simplified time-dependent density functional theory (sTD-DFT) as method accelerate calculations and yield similar accuracy. The models presented in paper, termed photovoltaic efficiency predictor (OPEP) models, have shown significantly lower errors than previous OPEP/B3LYP yielding 1.53% OPEP/sTD-DFT 1.55%. computational fast high-efficiency NFAs/donor pairs.

Язык: Английский

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