Recent progress in organic solar cells (Part I material science)

Science China Chemistry, Год журнала: 2021, Номер 65(2), С. 224 - 268

Опубликована: Дек. 27, 2021

Язык: Английский

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Completely non-fused electron acceptor with 3D-interpenetrated crystalline structure enables efficient and stable organic solar cell

Nature Communications, Год журнала: 2021, Номер 12(1)

Опубликована: Авг. 24, 2021

Abstract Non-fullerene acceptors (NFAs) based on non-fused conjugated structures have more potential to realize low-cost organic photovoltaic (OPV) cells. However, their power conversion efficiencies (PCEs) are much lower than those of the fused-ring NFAs. Herein, a new bithiophene-based core (TT-P i ) featuring good planarity as well large steric hindrance was designed, which completely NFA, A4T-16, developed. The single-crystal result A4T-16 reveals that three-dimensional interpenetrating network can be formed due compact π–π stacking between adjacent end-capping groups. A high PCE 15.2% is achieved PBDB-TF:A4T-16, highest value for cells Notably, device retains ~84% its initial after 1300 h under simulated AM 1.5 G illumination (100 mW cm −2 ). Overall, this work provides insight into molecule design NFAs from aspect molecular geometry control.

Язык: Английский

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Near‐Infrared Materials: The Turning Point of Organic Photovoltaics

Advanced Materials, Год журнала: 2021, Номер 34(10)

Опубликована: Окт. 28, 2021

Abstract Near‐infrared (NIR)‐absorbing organic semiconductors have opened up many exciting opportunities for photovoltaic (OPV) research. For example, new chemistries and synthetical methodologies been developed; especially, the breakthrough Y‐series acceptors, originally invented by our group, specifically Y1, Y3, Y6, contributed immensely to boosting single‐junction solar cell efficiency around 19%; novel device architectures such as tandem transparent photovoltaics realized. The concept of NIR donors/acceptors thus becomes a turning point in OPV field. Here, development NIR‐absorbing materials OPVs is reviewed. According low‐energy absorption window, here, (p‐type (polymers) n‐type (fullerene nonfullerene)) are classified into four categories: 700–800 nm, 800–900 900–1000 greater than 1000 nm. Each subsection covers design, synthesis, utilization various types donor (D) acceptor (A) units. structure–property relationship between kinds D, A units window constructed satisfy requirements different applications. Subsequently, variety applications realized materials, including OPVs, photodetectors, presented. Finally, challenges future next‐generation beyond discussed.

Язык: Английский

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Recent progress in organic solar cells based on non-fullerene acceptors: materials to devices

Journal of Materials Chemistry A, Год журнала: 2022, Номер 10(7), С. 3255 - 3295

Опубликована: Янв. 1, 2022

This review presents the recent progress in organic solar cells based on non-fullerene acceptors, with a wide coverage from material synthesis and processing to interface engineering, device structure, large-area fabrication, stability.

Язык: Английский

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Simple Nonfused Ring Electron Acceptors with 3D Network Packing Structure Boosting the Efficiency of Organic Solar Cells to 15.44%

Advanced Energy Materials, Год журнала: 2021, Номер 11(45)

Опубликована: Окт. 17, 2021

Abstract Three nonfused ring electron acceptors (NFREAs; 2Th‐2F, BTh‐Th‐2F, and 2BTh‐2F) with thieno[3,2‐ b ]thiophene bearing two bis(4‐butylphenyl)amino substituents as the core, 3‐octylthiophene or 3‐octylthieno[3,2‐ spacer, 3‐(1,1‐dicyanomethylene)‐5,6‐difluoro‐1‐indanone terminal group are designed synthesized. The molar extinction coefficient of mobility blend films gradually increase increasing π‐conjugation length. Moreover, 2BTh‐2F displays a planar molecular conformation assisted by S···N S···O intramolecular interactions. More importantly, stacking changes from 2D packing for 2Th‐2F analog to 3D network 2BTh‐2F. Due these comprehensive merits, 2BTh‐2F:PBDB‐T‐based organic solar cells give high power conversion efficiency 14.53%. impressively, when D18 is used donor polymer, further enhanced 15.44%, which highest value reported based on NFREAs.

Язык: Английский

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Benzo[d]thiazole Based Wide Bandgap Donor Polymers Enable 19.54% Efficiency Organic Solar Cells Along with Desirable Batch‐to‐Batch Reproducibility and General Applicability

Advanced Materials, Год журнала: 2023, Номер 35(21)

Опубликована: Март 4, 2023

Abstract The limited selection pool of high‐performance wide bandgap (WBG) polymer donors is a bottleneck problem the nonfullerene acceptor (NFA) based organic solar cells (OSCs) that impedes further improvement their photovoltaic performances. Herein, series new WBG polymers, namely PH‐BTz, PS‐BTz, PF‐BTz, and PCl‐BTz, are developed by using bicyclic difluoro‐benzo[d]thiazole (BTz) as block benzo[1,2‐b:4,5‐b′]dithiophene (BDT) derivatives donor units. By introducing S, F, Cl atoms to alkylthienyl sidechains on BDT, resulting polymers exhibit lowered energy levels enhanced aggregation properties. fluorinated PBTz‐F not only exhibits low‐lying HOMO level, but also has stronger face‐on packing order results in more uniform fibril‐like interpenetrating networks related PF‐BTz:L8‐BO blend. A high‐power conversion efficiency (PCE) 18.57% achieved. Moreover, good batch‐to‐batch reproducibility general applicability. In addition, ternary blend OSCs host PBTz‐F:L8‐BO PM6 guest PCE 19.54%, which among highest values OSCs.

Язык: Английский

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A Synergistic Strategy of Manipulating the Number of Selenophene Units and Dissymmetric Central Core of Small Molecular Acceptors Enables Polymer Solar Cells with 17.5 % Efficiency

Angewandte Chemie International Edition, Год журнала: 2021, Номер 60(35), С. 19241 - 19252

Опубликована: Июнь 3, 2021

Abstract A dissymmetric backbone and selenophene substitution on the central core was used for synthesis of symmetric or A‐DA′D‐A type non‐fullerene small molecular acceptors (NF‐SMAs) with different numbers selenophene. From S‐YSS‐Cl to A‐WSSe‐Cl S‐WSeSe‐Cl , a gradually red‐shifted absorption larger electron mobility crystallinity in neat thin film observed. exhibit stronger tighter intermolecular π–π stacking interactions, extra S⋅⋅⋅N non‐covalent interactions from benzothiadiazole, better ordered 3D interpenetrating charge‐transfer networks comparison thiophene‐based . The ‐based device has PCE 17.51 %, which is highest value selenophene‐based NF‐SMAs binary polymer solar cells. combination precise replacement effective improve J sc FF without sacrificing V oc

Язык: Английский

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Advances in organic photovoltaic cells: a comprehensive review of materials, technologies, and performance

RSC Advances, Год журнала: 2023, Номер 13(18), С. 12244 - 12269

Опубликована: Янв. 1, 2023

The paper analyzes the key features, performance, efficiency, and electrical characteristics of organic PV cells to highlight latest trends advancements by using comparative tables a comprehensive SWOT analysis.

Язык: Английский

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Non-fullerene acceptors with hetero-dihalogenated terminals induce significant difference in single crystallography and enable binary organic solar cells with 17.5% efficiency

Energy & Environmental Science, Год журнала: 2021, Номер 15(1), С. 320 - 333

Опубликована: Окт. 6, 2021

A synergistic hetero-dihalogenated terminals strategy was systematically employed for the first time to enhance single-crystal packing, boosting device performance of a Y-BO-FCl:PM6 with remarkable PCE 17.52%.

Язык: Английский

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Central Unit Fluorination of Non‐Fullerene Acceptors Enables Highly Efficient Organic Solar Cells with Over 18 % Efficiency

Angewandte Chemie International Edition, Год журнала: 2022, Номер 61(41)

Опубликована: Июль 27, 2022

Halogenation of terminal acceptors has been shown to give dramatic improvements in power conversion efficiencies (PCEs) organic solar cells (OSCs). Similar significant results could be expected from the halogenation central units state-of-the-art Y-series acceptors. Herein, a pair acceptors, termed CH6 and CH4, featuring conjugation-extended phenazine unit with without fluorination, have synthesized. The fluorinated enhanced molecular interactions crystallinity, superior fibrillar network morphology improved charge generation transport blend films, thus affording higher PCE 18.33 % for CH6-based binary OSCs compared 16.49 non-fluorinated CH4. new site offers further opportunities structural optimization molecules afford better-performed reveals effectiveness fluorination on units.

Язык: Английский

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