Modified optoelectronic parameters by end-group engineering of A-D-A type non-fullerene-based small symmetric acceptors constituting IBDT core for high-performance photovoltaics

Journal of Physics and Chemistry of Solids, Год журнала: 2023, Номер 181, С. 111495 - 111495

Опубликована: Июнь 16, 2023

Язык: Английский

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A machine learning prediction model for quantitative analyzing the influence of non-radiative voltage loss on non-fullerene organic solar cells

Chemical Engineering Journal, Год журнала: 2023, Номер 475, С. 145958 - 145958

Опубликована: Сен. 9, 2023

Язык: Английский

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Correlating Aggregation Ability of Polymer Donors with Film Formation Kinetics for Organic Solar Cells with Improved Efficiency and Processability

Advanced Materials, Год журнала: 2024, Номер 36(29)

Опубликована: Май 4, 2024

Film formation kinetics significantly impact molecular processability and power conversion efficiency (PCE) of organic solar cells. Here, two ternary random copolymerization polymers are reported, D18─N-p D18─N-m, to modulate the aggregation ability D18 by introducing trifluoromethyl-substituted pyridine unit at para- meta-positions, respectively. The introduction reduces material adjusts interactions with acceptor L8-BO, thereby leading largely changed film earlier phase separation longer times, which enlarge fiber sizes in blend films improve carrier generation transport. As a result, moderate delivers high PCE 18.82% is further improved 19.45% via interface engineering. Despite slightly inferior small area device performances, D18─N-m shows solubility, inspires adjust ratio meta-trifluoromethyl carefully obtain polymer donor D18─N-m-10 good solubility nonhalogenated solvent o-xylene. High PCEs 13.07% 12.43% 1 cm

Язык: Английский

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Synergistically optimizing the optoelectronic properties and morphology using a photo-active solid additive for high-performance binary organic photovoltaics

Energy & Environmental Science, Год журнала: 2024, Номер 17(7), С. 2598 - 2609

Опубликована: Янв. 1, 2024

This work explores a new solid additive with TADF properties for high-performance OPVs. The fine-tunes the morphology and enhances exciton diffusion dissociation, resulting in an efficiency of 19.4%, making it one top binary

Язык: Английский

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19.36% Efficiency Organic Solar Cells Based on Low‐Cost Terpolymer Donors with Simple Molecular Structures

Advanced Functional Materials, Год журнала: 2024, Номер 34(44)

Опубликована: Май 19, 2024

Abstract Low cost and high performance are key elements for the industrialization of organic solar cells (OSCs). In view this, developing highly‐efficient photovoltaic molecules with simple chemical structure is one most effective countermeasures. Herein, three simple‐structure terpolymers PTQ12‐5, PTQ12‐10, PTQ12‐15 designed synthesized, by embedding difluoro‐substituted bithiophene (2T‐2F) unit into backbone low‐cost high‐efficiency polymer PTQ10. The synthesis contains only two‐step synthetic routes over 85% yields from cheap raw compounds, thus exhibiting distinctly characteristic. Remarkably, PTQ12‐5 shows significantly higher absorbance coefficient hole mobility than Consequently, PTQ12‐5‐based OSCs more efficient exciton dissociation charge transfer, suppressed carrier recombination, tighter molecular π‐π stacking, faster balanced transport, demonstrates a improved efficiency 18.77% that PTQ10‐based device (18.03%). Moreover, an outstanding 19.36% achieved in ternary further modulating energy level alignment blending features photoactive molecules, which highest based on polymers to date. This work has significant implications guiding design high‐performance materials.

Язык: Английский

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Boron- and Nitrogen-Embedded Polycyclic Arenes as an Emerging Class of Organic Semiconductors

Chemistry of Materials, Год журнала: 2023, Номер 35(24), С. 10277 - 10294

Опубликована: Дек. 11, 2023

The development of novel organic semiconductors has continuously promoted the field optoelectronics. During past decade, boron- and nitrogen-embedded (BN-embedded) polycyclic arenes have attracted considerable attention, enriching structural diversity providing a broad space for tuning their optoelectronic properties. application BN-embedded conjugated materials in different devices achieved excellent performance, e.g., high charge-carrier mobilities (μ > 1.0 cm2 V–1 s–1) field-effect transistors (OFETs), ultrapure electroluminescence (full-width at half-maximum ≤ 18 nm) light-emitting diodes (OLEDs), power conversion efficiency (PCE 19%) photovoltaics (OPVs). These advances make promising class high-performance semiconductors. Nevertheless, inherent relationship between BN-doping modes properties never been systematically discussed. In this Perspective, we aim to present an overview unique family by selecting representative examples. We will first outline characters modes, discuss effect on electronic structures arenes, finally showcase advanced applications emerging devices. hope bring together communities further promote semiconductor materials.

Язык: Английский

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Tetrahydrofuran Processable Organic Solar Cells with 19.45% Efficiency Realized by Introducing High Molecular Dipole Unit Into the Terpolymer

Advanced Materials, Год журнала: 2024, Номер unknown

Опубликована: Окт. 14, 2024

Developing organic solar cells (OSCs) processable with halogen-free, non-aromatic solvents is crucial for practical applications, yet challenging due to the limited solubility of most photoactive materials. This study introduces high-performance terpolymers in tetrahydrofuran (THF) by incorporating dithienophthalimide (DPI) into PM6 backbone. DPI extends absorption band, lowers HOMO levels, and improves THF film crystallinity through its large dipole moment effect. Optimal PBD-10:L8-BO devices processed achieved a competitive power conversion efficiency (PCE) 18.79%, approaching chloroform-processed (19.04%). By introducing PBTz-F as second donor, ternary OSCs reached an impressive 19.45% PCE when THF. improvement stems from enhanced photon generation, improved morphology, better charge transport, longer exciton lifetimes, efficient dissociation collection, suppressed recombination. These PCEs 18.79% binary blend OSCs, respectively, represent highest reported efficiencies solvents. work demonstrates significant progress eco-friendly OSC fabrication, paving way more sustainable commercially viable photovoltaic technologies.

Язык: Английский

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Processability Considerations for Next‐Generation Organic Photovoltaic Materials

Advanced Materials, Год журнала: 2023, Номер unknown

Опубликована: Дек. 4, 2023

The evolution of organic semiconductors for photovoltaics (OPVs) has resulted in unforeseen outcomes. This provided substitute choices photoactive layer materials, which effectively convert sunlight into electricity. Recently developed OPV materials have narrowed down the gaps efficiency, stability, and cost devices. Records now show power conversion efficiency single-junction devices closing to 20%. Despite this, there is still a gap between currently those that meet requirements practical applications, especially solution processability issue widely concerned field OPVs. Based on general rule structure determines properties, methodologies enhance are reviewed explored from perspective material design views further development processable presented. Considering current dilemma existing evaluation indicators cannot reflect industrial more complete set key performance proposed their considerations. purpose this raise awareness boundary conditions exist manufacturing provide guidance academic research aspires contribute technological advancements.

Язык: Английский

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Self‐Templating Copolymerization to Produce Robust Conductive Nanocoatings Based on Conjugated Polymer Brushes with Implementable Memristive Characteristics

Small, Год журнала: 2024, Номер 20(29)

Опубликована: Фев. 9, 2024

An effective synthesis of conductive polymer brushes, i.e., self-templating surface-initiated copolymerization (ST-SICP), is developed. It proceeds through pendant thiophene groups in the precursor multimonomer poly(3-methylthienyl methacrylate) (PMTM) brushes with free 3-methylthiophene (3MT) monomers leading to PMTM-co-P3MT brushes. This approach leads improved conformational freedom generated conjugated poly(thiophene)-based chains and their higher share respect conjugation only. As a result, best performing demonstrate high ohmic conductivity both out-of-plane in-plane direction. Furthermore, thanks covalent anchoring as well intra- intermolecular connections, highly stable mechanically robust nanocoatings are produced which can survive mechanical cleaning long-term storage under ambient conditions. Grafting ionic poly(sodium 4-styrenesulfonate) (PSSNa) between brings new properties such binary mixed that operate thin-film memristive coating switchable conductance. worth mentioning crucial synthetic steps, grafting PMTM by organocatalyzed atom transfer radical polymerization (SI-O-ATRP) PSSNa photoiniferter-mediated (SI-PIMP) conducted conditions using only microliter volumes reagents providing methodology be considered for use beyond laboratory scale.

Язык: Английский

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Developing Benzodithiophene-Free donor polymer for 19.36% efficiency Green-Solvent-Processable organic solar cells

Chemical Engineering Journal, Год журнала: 2024, Номер 490, С. 151920 - 151920

Опубликована: Май 5, 2024

Язык: Английский

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